Heterodox
145-527: Macroeconomics is a branch of economics that deals with the performance, structure, behavior, and decision-making of an economy as a whole. This includes regional, national, and global economies . Macroeconomists study topics such as output / GDP (gross domestic product) and national income , unemployment (including unemployment rates ), price indices and inflation , consumption , saving , investment , energy , international trade , and international finance . Macroeconomics and microeconomics are
290-692: A fixed exchange rate regime, aligning their currency with one or more foreign currencies, typically the US dollar or the euro . Conventional monetary policy can be ineffective in situations such as a liquidity trap . When nominal interest rates are near zero, central banks cannot loosen monetary policy through conventional means. In that situation, they may use unconventional monetary policy such as quantitative easing to help stabilize output. Quantity easing can be implemented by buying not only government bonds, but also other assets such as corporate bonds, stocks, and other securities. This allows lower interest rates for
435-630: A fixed exchange rate system or even a currency union like the Economic and Monetary Union of the European Union , drawing on the research literature on optimum currency areas . Macroeconomics as a separate field of research and study is generally recognized to start with the publication of John Maynard Keynes ' The General Theory of Employment, Interest, and Money in 1936. The terms "macrodynamics" and "macroanalysis" were introduced by Ragnar Frisch in 1933, and Lawrence Klein in 1946 used
580-436: A 2% inflation rate just because that has been the average the past few years; they will look at current monetary policy and economic conditions to make an informed forecast. In the new classical models with rational expectations, monetary policy only had a limited impact. Lucas also made an influential critique of Keynesian empirical models. He argued that forecasting models based on empirical relationships would keep producing
725-466: A 3% increase in output would lead to a 1% decrease in unemployment. The structural or natural rate of unemployment is the level of unemployment that will occur in a medium-run equilibrium, i.e. a situation with a cyclical unemployment rate of zero. There may be several reasons why there is some positive unemployment level even in a cyclically neutral situation, which all have their foundation in some kind of market failure : A general price increase across
870-803: A basis for making economic forecasting . Well-known specific theoretical models include short-term models like the Keynesian cross , the IS–LM model and the Mundell–Fleming model , medium-term models like the AD–AS model , building upon a Phillips curve , and long-term growth models like the Solow–Swan model, the Ramsey–Cass–Koopmans model and Peter Diamond 's overlapping generations model . Quantitative models include early large-scale macroeconometric model ,
1015-612: A broader class of assets beyond government bonds. A similar strategy is to lower long-term interest rates by buying long-term bonds and selling short-term bonds to create a flat yield curve , known in the US as Operation Twist . Fiscal policy is the use of government's revenue ( taxes ) and expenditure as instruments to influence the economy. For example, if the economy is producing less than potential output , government spending can be used to employ idle resources and boost output, or taxes could be lowered to boost private consumption which has
1160-401: A business to create goods or provide services for consumers, capital goods are important in other ways. In an industry where production equipment and materials are quite expensive, they can be a high barrier to entry for new companies. If a new business cannot afford to purchase the machines it needs to create a product, for example, it may not be able to compete as effectively in the market. Such
1305-401: A company might turn to another business to supply its products, but this can be expensive as well. This means that, in industries where the means of production represent a large amount of a business's start-up costs, the number of companies competing in the market is often relatively small. The acquisition of machinery and other expensive equipment often represents a significant investment for
1450-418: A company. When a business is struggling, it often puts off such purchases as long as possible, since it does not make sense to spend money on equipment if the company is not around to use it. Capital spending can be a sign that a manufacturer expects growth or at least a steady demand for its products, a potentially positive economic sign. In most cases, capital goods require a substantial investment on behalf of
1595-568: A core part of contemporary macroeconomics. The 2007–2008 financial crisis , which led to the Great Recession , led to major reassessment of macroeconomics, which as a field generally had neglected the potential role of financial institutions in the economy. After the crisis, macroeconomic researchers have turned their attention in several new directions: Research in the economics of the determinants behind long-run economic growth has followed its own course. The Harrod-Domar model from
SECTION 10
#17327810558051740-702: A definition of economics as a study of human behaviour, subject to and constrained by scarcity, which forces people to choose, allocate scarce resources to competing ends, and economise (seeking the greatest welfare while avoiding the wasting of scarce resources). According to Robbins: "Economics is the science which studies human behavior as a relationship between ends and scarce means which have alternative uses". Robbins' definition eventually became widely accepted by mainstream economists, and found its way into current textbooks. Although far from unanimous, most mainstream economists would accept some version of Robbins' definition, even though many have raised serious objections to
1885-451: A distinct field. The book focused on determinants of national income in the short run when prices are relatively inflexible. Keynes attempted to explain in broad theoretical detail why high labour-market unemployment might not be self-correcting due to low " effective demand " and why even price flexibility and monetary policy might be unavailing. The term "revolutionary" has been applied to the book in its impact on economic analysis. During
2030-520: A distinction that is often confused with David Ricardo 's. In Marxian theory, variable capital refers to a capitalist's investment in labor-power, seen as the only source of surplus-value . It is called "variable" since the amount of value it can produce varies from the amount it consumes, i.e. , it creates new value. On the other hand, constant capital refers to investment in non-human factors of production, such as plant and machinery, which Marx takes to contribute only its own replacement value to
2175-603: A key role in the economic analysis of "... growth and production, as well as the distribution of income..." Capital goods can also be immaterial, when they take the form of intellectual property . Many production processes require the intellectual property to (legally) produce their products. Just like material capital goods, they can require substantial investment, and can also be subject to amortization, depreciation, and divestment. People buy capital goods to use as static resources to make other goods, whereas consumer goods are purchased to be consumed. For example, an automobile
2320-420: A lower relative cost of production, rather relying only on its own production. It has been termed a "fundamental analytical explanation" for gains from trade . Coming at the end of the classical tradition, John Stuart Mill (1848) parted company with the earlier classical economists on the inevitability of the distribution of income produced by the market system. Mill pointed to a distinct difference between
2465-425: A major factor in the process of technical innovation : All innovations—whether they involve the introduction of a new product or provide a cheaper way of producing an existing product—require that the capital goods sector shall produce a new product (machine or physical plant ) according to certain specifications . Capital goods are a constituent element of the stock of capital assets, or fixed capital and play
2610-442: A medium-run equilibrium (or "potential") level, the process would be slow at best. Keynes coined the term liquidity preference (his preferred name for what is also known as money demand ) and explained how monetary policy might affect aggregate demand, at the same time offering clear policy recommendations for an active role of fiscal policy in stabilizing aggregate demand and hence output and employment. In addition, he explained how
2755-449: A more comprehensive theory of costs on the supply side. In the 20th century, neoclassical theorists departed from an earlier idea that suggested measuring total utility for a society, opting instead for ordinal utility , which posits behaviour-based relations across individuals. In microeconomics , neoclassical economics represents incentives and costs as playing a pervasive role in shaping decision making . An immediate example of this
2900-467: A more important role in mainstream economic theory. Also, heterogeneity among the economic agents, e.g. differences in income, plays an increasing role in recent economic research. Other schools or trends of thought referring to a particular style of economics practised at and disseminated from well-defined groups of academicians that have become known worldwide, include the Freiburg School ,
3045-418: A parallel division of macroeconomic policies into short-run policies aimed at mitigating the harmful consequences of business cycles (known as stabilization policy ) and medium- and long-run policies targeted at improving the structural levels of macroeconomic variables. Stabilization policy is usually implemented through two sets of tools: fiscal and monetary policy. Both forms of policy are used to stabilize
SECTION 20
#17327810558053190-597: A proportion of the value their work had created. Marxian economics was further developed by Karl Kautsky (1854–1938)'s The Economic Doctrines of Karl Marx and The Class Struggle (Erfurt Program) , Rudolf Hilferding 's (1877–1941) Finance Capital , Vladimir Lenin (1870–1924)'s The Development of Capitalism in Russia and Imperialism, the Highest Stage of Capitalism , and Rosa Luxemburg (1871–1919)'s The Accumulation of Capital . At its inception as
3335-409: A rapidly growing population against a limited amount of land meant diminishing returns to labour. The result, he claimed, was chronically low wages, which prevented the standard of living for most of the population from rising above the subsistence level. Economist Julian Simon has criticised Malthus's conclusions. While Adam Smith emphasised production and income, David Ricardo (1817) focused on
3480-469: A set of stable preferences, a definite overall guiding objective, and the capability of making a choice. There exists an economic problem, subject to study by economic science, when a decision (choice) is made by one or more players to attain the best possible outcome. Keynesian economics derives from John Maynard Keynes , in particular his book The General Theory of Employment, Interest and Money (1936), which ushered in contemporary macroeconomics as
3625-498: A similar effect. Government spending or tax cuts do not have to make up for the entire output gap . There is a multiplier effect that affects the impact of government spending. For instance, when the government pays for a bridge, the project not only adds the value of the bridge to output, but also allows the bridge workers to increase their consumption and investment, which helps to close the output gap. The effects of fiscal policy can be limited by partial or full crowding out . When
3770-409: A single tax on income of land owners. In reaction against copious mercantilist trade regulations, the physiocrats advocated a policy of laissez-faire , which called for minimal government intervention in the economy. Adam Smith (1723–1790) was an early economic theorist. Smith was harshly critical of the mercantilists but described the physiocratic system "with all its imperfections" as "perhaps
3915-452: A social science, economics was defined and discussed at length as the study of production, distribution, and consumption of wealth by Jean-Baptiste Say in his Treatise on Political Economy or, The Production, Distribution, and Consumption of Wealth (1803). These three items were considered only in relation to the increase or diminution of wealth, and not in reference to their processes of execution. Say's definition has survived in part up to
4060-435: A sought after end). Some subsequent comments criticised the definition as overly broad in failing to limit its subject matter to analysis of markets. From the 1960s, however, such comments abated as the economic theory of maximizing behaviour and rational-choice modelling expanded the domain of the subject to areas previously treated in other fields. There are other criticisms as well, such as in scarcity not accounting for
4205-545: A special case of the more general Ramsey growth model , where households' savings rates are not constant as in the Solow model, but derived from an explicit intertemporal utility function . In the 1980s and 1990s endogenous growth theory arose to challenge the neoclassical growth theory of Ramsey and Solow. This group of models explains economic growth through factors such as increasing returns to scale for capital and learning-by-doing that are endogenously determined instead of
4350-499: A specific type of goods, i.e. , capital goods. Austrian School economist Eugen Boehm von Bawerk maintained that capital intensity was measured by the roundaboutness of production processes. Since capital is defined by him as being goods of higher-order, or goods used to produce consumer goods, and derived their value from them, being future goods. Human development theory describes human capital as being composed of distinct social, imitative and creative elements: This theory
4495-442: A synthesis emerged by the 2000s, often given the name the new neoclassical synthesis . It integrated the rational expectations and optimizing framework of the new classical theory with a new Keynesian role for nominal rigidities and other market imperfections like imperfect information in goods, labour and credit markets. The monetarist importance of monetary policy in stabilizing the economy and in particular controlling inflation
Macroeconomics - Misplaced Pages Continue
4640-532: A transhistorical state of affairs distinguishes different forms of capital: Adam Smith defined capital as "that part of man's stock which he expects to afford him revenue". In economic models , capital is an input in the production function . The total physical capital at any given moment in time is referred to as the capital stock (not to be confused with the capital stock of a business entity). Capital goods , real capital, or capital assets are already-produced, durable goods or any non-financial asset that
4785-401: A whole intellectural framework - a novel theory of economics that explained why markets might not clear, which would evolve into a school of thought known as Keynesian economics , also called Keynesianism or Keynesian theory. In Keynes' theory, aggregate demand - by Keynes called "effective demand" - was key to determining output. Even if Keynes conceded that output might eventually return to
4930-433: Is a consumer good when purchased as a private car. Dump trucks used in manufacturing or construction are capital goods because companies use them to build things like roads, dams, buildings, and bridges. In the same way, a chocolate bar is a consumer good, but the machines that produce the candy are capital goods. Some capital goods can be used in both production of consumer goods or production goods, such as machinery for
5075-421: Is a term for the "way (nomos) to run a household (oikos)", or in other words the know-how of an οἰκονομικός ( oikonomikos ), or "household or homestead manager". Derived terms such as "economy" can therefore often mean "frugal" or "thrifty". By extension then, "political economy" was the way to manage a polis or state. There are a variety of modern definitions of economics ; some reflect evolving views of
5220-545: Is affected. Expansionary monetary policy lowers interest rates, increasing economic activity, whereas contractionary monetary policy raises interest rates. In the case of a fixed exchange rate system, interest rate decisions together with direct intervention by central banks on exchange rate dynamics are major tools to control the exchange rate. In developed countries, most central banks follow inflation targeting , focusing on keeping medium-term inflation close to an explicit target, say 2%, or within an explicit range. This includes
5365-438: Is also applied to such diverse subjects as crime , education , the family , feminism , law , philosophy , politics , religion , social institutions , war , science , and the environment . The earlier term for the discipline was "political economy", but since the late 19th century, it has commonly been called "economics". The term is ultimately derived from Ancient Greek οἰκονομία ( oikonomia ) which
5510-468: Is implemented through automatic stabilizers without any active decisions by politicians. Automatic stabilizers do not suffer from the policy lags of discretionary fiscal policy . Automatic stabilizers use conventional fiscal mechanisms, but take effect as soon as the economy takes a downturn: spending on unemployment benefits automatically increases when unemployment rises, and tax revenues decrease, which shelters private income and consumption from part of
5655-407: Is measured by the unemployment rate, i.e. the percentage of persons in the labor force who do not have a job, but who are actively looking for one. People who are retired, pursuing education, or discouraged from seeking work by a lack of job prospects are not part of the labor force and consequently not counted as unemployed, either. Unemployment has a short-run cyclical component which depends on
5800-503: Is not really capital, because "Their economic value merely represents the power of one class to appropriate the earnings of another" and "their increase or decrease does not affect the sum of wealth in the community". Some thinkers, such as Werner Sombart and Max Weber , locate the concept of capital as originating in double-entry bookkeeping , which is thus a foundational innovation in capitalism , Sombart writing in "Medieval and Modern Commercial Enterprise" that: Karl Marx adds
5945-413: Is promoting it. By preferring the support of domestic to that of foreign industry, he intends only his own security; and by directing that industry in such a manner as its produce may be of the greatest value, he intends only his own gain, and he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention. Nor is it always the worse for the society that it
Macroeconomics - Misplaced Pages Continue
6090-414: Is referred to as an "environment's source function", and this function is depleted as resources are consumed or pollution contaminates the resources. The "sink function" describes an environment's ability to absorb and render harmless waste and pollution: when waste output exceeds the limit of the sink function, long-term damage occurs. The division into various time frames of macroeconomic research leads to
6235-460: Is that of an economy's openness, economic theory distinguishing sharply between closed economies and open economies . It is usual to distinguish between three time horizons in macroeconomics, each having its own focus on e.g. the determination of output: National output is the total amount of everything a country produces in a given period of time. Everything that is produced and sold generates an equal amount of income. The total net output of
6380-598: Is the consumer theory of individual demand, which isolates how prices (as costs) and income affect quantity demanded. In macroeconomics it is reflected in an early and lasting neoclassical synthesis with Keynesian macroeconomics. Neoclassical economics is occasionally referred as orthodox economics whether by its critics or sympathisers. Modern mainstream economics builds on neoclassical economics but with many refinements that either supplement or generalise earlier analysis, such as econometrics , game theory , analysis of market failure and imperfect competition , and
6525-459: Is the basis of triple bottom line accounting and is further developed in ecological economics , welfare economics and the various theories of green economics . All of which use a particularly abstract notion of capital in which the requirement of capital being produced like durable goods is effectively removed. The Cambridge capital controversy was a dispute between economists at Cambridge, Massachusetts based MIT and University of Cambridge in
6670-417: Is the machinery used in a factory . At the macroeconomic level, "the nation's capital stock includes buildings, equipment, software, and inventories during a given year." Capital goods have also been called complex product systems ( CoPS ). The means of production is as a "...series of heterogeneous commodities, each having specific technical characteristics ..." in the form of a durable good that
6815-469: Is the product of two inputs: capital and labor. The Solow model assumes that labor and capital are used at constant rates without the fluctuations in unemployment and capital utilization commonly seen in business cycles. In this model, increases in output, i.e. economic growth, can only occur because of an increase in the capital stock, a larger population, or technological advancements that lead to higher productivity ( total factor productivity ). An increase in
6960-531: Is used in production of goods or services . Classical and neoclassical economics describe capital as one of the factors of production (alongside the other factors: land and labour ). All other inputs to production are called intangibles in classical economics. This includes organization, entrepreneurship , knowledge, goodwill, or management (which some characterize as talent , social capital or instructional capital). Many definitions and descriptions of capital goods production have been proposed in
7105-401: Is used in the production of goods or services. Capital goods are a particular form of economic good and are tangible property . Capital goods are one of the three types of producer goods , the other two being land and labour . The three are also known collectively as "primary factors of production ". This classification originated during the classical economics period and has remained
7250-607: Is viewed as basic elements within economies , including individual agents and markets , their interactions, and the outcomes of interactions. Individual agents may include, for example, households, firms, buyers, and sellers. Macroeconomics analyses economies as systems where production, distribution, consumption, savings , and investment expenditure interact, and factors affecting it: factors of production , such as labour , capital , land , and enterprise , inflation , economic growth , and public policies that have impact on these elements . It also seeks to analyse and describe
7395-526: Is what makes it a factor of production: These distinctions of convenience have carried over to contemporary economic theory . Adam Smith provided the further clarification that capital is a stock . As such, its value can be estimated at a point in time. By contrast, investment , as production to be added to the capital stock, is described as taking place over time ("per year"), thus a flow . Earlier illustrations often described capital as physical items, such as tools, buildings, and vehicles that are used in
SECTION 50
#17327810558057540-606: The Federal Reserve and the European Central Bank , which are generally considered to follow a strategy very close to inflation targeting, even though they do not officially label themselves as inflation targeters. In practice, an official inflation targeting often leaves room for the central bank to also help stabilize output and employment, a strategy known as "flexible inflation targeting". Most emerging economies focus their monetary policy on maintaining
7685-732: The School of Lausanne , the Stockholm school and the Chicago school of economics . During the 1970s and 1980s mainstream economics was sometimes separated into the Saltwater approach of those universities along the Eastern and Western coasts of the US, and the Freshwater, or Chicago school approach. Within macroeconomics there is, in general order of their historical appearance in
7830-433: The macroeconomics of high unemployment. Gary Becker , a contributor to the expansion of economics into new areas, described the approach he favoured as "combin[ing the] assumptions of maximizing behaviour, stable preferences , and market equilibrium , used relentlessly and unflinchingly." One commentary characterises the remark as making economics an approach rather than a subject matter but with great specificity as to
7975-473: The multiplier effect would magnify a small decrease in consumption or investment and cause declines throughout the economy, and noted the role that uncertainty and animal spirits can play in the economy. The generation following Keynes combined the macroeconomics of the General Theory with neoclassical microeconomics to create the neoclassical synthesis . By the 1950s, most economists had accepted
8120-467: The neoclassical model of economic growth for analysing long-run variables affecting national income . Neoclassical economics studies the behaviour of individuals , households , and organisations (called economic actors, players, or agents), when they manage or use scarce resources, which have alternative uses, to achieve desired ends. Agents are assumed to act rationally, have multiple desirable ends in sight, limited resources to obtain these ends,
8265-415: The societal to the microeconomic level: Economics is a study of man in the ordinary business of life. It enquires how he gets his income and how he uses it. Thus, it is on the one side, the study of wealth and on the other and more important side, a part of the study of man. Lionel Robbins (1932) developed implications of what has been termed "[p]erhaps the most commonly accepted current definition of
8410-400: The "choice process and the type of social interaction that [such] analysis involves." The same source reviews a range of definitions included in principles of economics textbooks and concludes that the lack of agreement need not affect the subject-matter that the texts treat. Among economists more generally, it argues that a particular definition presented may reflect the direction toward which
8555-409: The 1940s attempted to build a long-run growth model inspired by Keynesian demand-driven considerations. The Solow–Swan model worked out by Robert Solow and, independently, Trevor Swan in the 1950s achieved more long-lasting success, however, and is still today a common textbook model for explaining economic growth in the long-run. The model operates with a production function where national output
8700-486: The 1970s and 1980s, when several major central banks followed a monetarist-inspired policy, but was later abandoned because the results were unsatisfactory. A more fundamental challenge to the prevailing Keynesian paradigm came in the 1970s from new classical economists like Robert Lucas , Thomas Sargent and Edward Prescott . They introduced the notion of rational expectations in economics, which had profound implications for many economic discussions, among which were
8845-499: The Great Depression struck, the reigning economists had difficulty explaining how goods could go unsold and workers could be left unemployed. In the prevailing neoclassical economics paradigm, prices and wages would drop until the market cleared, and all goods and labor were sold. Keynes in his main work, the General Theory , initiated what is known as the Keynesian revolution . He offered a new interpretation of events and
SECTION 60
#17327810558058990-473: The Keynesian school. A central development in new classical thought came when Robert Lucas introduced rational expectations to macroeconomics. Prior to Lucas, economists had generally used adaptive expectations where agents were assumed to look at the recent past to make expectations about the future. Under rational expectations, agents are assumed to be more sophisticated. Consumers will not simply assume
9135-1170: The Lucas critique. Like classical models, new classical models had assumed that prices would be able to adjust perfectly and monetary policy would only lead to price changes. New Keynesian models investigated sources of sticky prices and wages due to imperfect competition , which would not adjust, allowing monetary policy to impact quantities instead of prices. Stanley Fischer and John B. Taylor produced early work in this area by showing that monetary policy could be effective even in models with rational expectations when contracts locked in wages for workers. Other new Keynesian economists, including Olivier Blanchard , Janet Yellen , Julio Rotemberg , Greg Mankiw , David Romer , and Michael Woodford , expanded on this work and demonstrated other cases where various market imperfections caused inflexible prices and wages leading in turn to monetary and fiscal policy having real effects. Other researchers focused on imperferctions in labor markets, developing models of efficiency wages or search and matching (SAM) models, or imperfections in credit markets like Ben Bernanke . By
9280-476: The UK about the measurement of capital. The Cambridge, UK economists, including Joan Robinson and Piero Sraffa claimed that there is no basis for aggregating the heterogeneous objects that constitute 'capital goods.' Political economists Jonathan Nitzan and Shimshon Bichler have suggested that capital is not a productive entity, but solely financial and that capital values measure the relative power of owners over
9425-407: The analysis of wealth: how wealth is created (production), distributed, and consumed; and how wealth can grow. But he said that economics can be used to study other things, such as war, that are outside its usual focus. This is because war has as the goal winning it (as a sought after end ), generates both cost and benefits; and, resources (human life and other costs) are used to attain the goal. If
9570-479: The area of inquiry or object of inquiry rather than the methodology. In the biology department, it is not said that all biology should be studied with DNA analysis. People study living organisms in many different ways, so some people will perform DNA analysis, others might analyse anatomy, and still others might build game theoretic models of animal behaviour. But they are all called biology because they all study living organisms. According to Ha Joon Chang, this view that
9715-443: The author believes economics is evolving, or should evolve. Many economists including nobel prize winners James M. Buchanan and Ronald Coase reject the method-based definition of Robbins and continue to prefer definitions like those of Say, in terms of its subject matter. Ha-Joon Chang has for example argued that the definition of Robbins would make economics very peculiar because all other sciences define themselves in terms of
9860-441: The business cycle, and a more permanent structural component, which can be loosely thought of as the average unemployment rate in an economy over extended periods, and which is often termed the natural or structural rate of unemployment. Cyclical unemployment occurs when growth stagnates. Okun's law represents the empirical relationship between unemployment and short-run GDP growth. The original version of Okun's law states that
10005-458: The case of a very low interest level, the economy may be in a liquidity trap in which monetary policy becomes ineffective, which makes fiscal policy the more potent tool to stabilize the economy. Thirdly, in regimes where monetary policy is tied to fulfilling other targets, in particular fixed exchange rate regimes, the central bank cannot simultaneously adjust its interest rates to mitigate domestic business cycle fluctuations, making fiscal policy
10150-517: The colonies. Physiocrats , a group of 18th-century French thinkers and writers, developed the idea of the economy as a circular flow of income and output. Physiocrats believed that only agricultural production generated a clear surplus over cost, so that agriculture was the basis of all wealth. Thus, they opposed the mercantilist policy of promoting manufacturing and trade at the expense of agriculture, including import tariffs. Physiocrats advocated replacing administratively costly tax collections with
10295-506: The commodities it is used to produce. Investment or capital accumulation , in classical economic theory, is the production of increased capital. Investment requires that some goods be produced that are not immediately consumed, but instead used to produce other goods as capital goods . Investment is closely related to saving , though it is not the same. As Keynes pointed out, saving involves not spending all of one's income on current goods or services, while investment refers to spending on
10440-409: The consequences of international trade in goods , financial assets and possibly factor markets like labor migration and international relocation of firms (physical capital). It explores what determines import , export , the balance of trade and over longer horizons the accumulation of net foreign assets . An important topic is the role of exchange rates and the pros and cons of maintaining
10585-488: The design of modern monetary policy and are now standard workhorses in most central banks. After the 2007–2008 financial crisis , macroeconomic research has put greater emphasis on understanding and integrating the financial system into models of the general economy and shedding light on the ways in which problems in the financial sector can turn into major macroeconomic recessions. In this and other research branches, inspiration from behavioural economics has started playing
10730-400: The development of the macroeconomic research mainstream . Macroeconomics encompasses a variety of concepts and variables, but above all the three central macroeconomic variables are output, unemployment, and inflation. Besides, the time horizon varies for different types of macroeconomic topics, and this distinction is crucial for many research and policy debates. A further important dimension
10875-676: The difference may be considerable. Economists interested in long-run increases in output study economic growth. Advances in technology, accumulation of machinery and other capital , and better education and human capital , are all factors that lead to increased economic output over time. However, output does not always increase consistently over time. Business cycles can cause short-term drops in output called recessions . Economists look for macroeconomic policies that prevent economies from slipping into either recessions or overheating and that lead to higher productivity levels and standards of living . The amount of unemployment in an economy
11020-506: The distribution of income among landowners, workers, and capitalists. Ricardo saw an inherent conflict between landowners on the one hand and labour and capital on the other. He posited that the growth of population and capital, pressing against a fixed supply of land, pushes up rents and holds down wages and profits. Ricardo was also the first to state and prove the principle of comparative advantage , according to which each country should specialise in producing and exporting goods in that it has
11165-435: The dominant method for classification. Capital can be increased by the use of the factors of production , which however excludes certain durable goods like homes and personal automobiles that are not used in the production of saleable goods and services. In Marxian critique of political economy , capital is viewed as a social relation . Critical analysis of the economists portrayal of the capitalist mode of production as
11310-440: The economic system is dependant upon the environment. In this case, the circular flow of income diagram may be replaced by a more complex flow diagram reflecting the input of solar energy, which sustains natural inputs and environmental services which are then used as units of production . Once consumed, natural inputs pass out of the economy as pollution and waste. The potential of an environment to provide services and materials
11455-524: The economy , i.e. limiting the effects of the business cycle by conducting expansive policy when the economy is in a recession or contractive policy in the case of overheating . Structural policies may be labor market policies which aim to change the structural unemployment rate or policies which affect long-run propensities to save, invest, or engage in education or research and development. Central banks conduct monetary policy mainly by adjusting short-term interest rates . The actual method through which
11600-469: The economy can and should be studied in only one way (for example by studying only rational choices), and going even one step further and basically redefining economics as a theory of everything, is peculiar. Questions regarding distribution of resources are found throughout the writings of the Boeotian poet Hesiod and several economic historians have described Hesiod as the "first economist". However,
11745-454: The economy is usually measured as gross domestic product (GDP). Adding net factor incomes from abroad to GDP produces gross national income (GNI), which measures total income of all residents in the economy. In most countries, the difference between GDP and GNI are modest so that GDP can approximately be treated as total income of all the inhabitants as well, but in some countries, e.g. countries with very large net foreign assets (or debt),
11890-500: The economy was sufficient to explain the Great Depression , and that aggregate demand oriented explanations were not necessary. Friedman also argued that monetary policy was more effective than fiscal policy; however, Friedman doubted the government's ability to "fine-tune" the economy with monetary policy. He generally favored a policy of steady growth in money supply instead of frequent intervention. Friedman also challenged
12035-459: The economy, could hardly generate the large short-run output fluctuations that we observe. In addition, there is strong empirical evidence that monetary policy does affect real economic activity, and the idea that technological regress can explain recent recessions seems implausible. Despite criticism of the realism in the RBC models, they have been very influential in economic methodology by providing
12180-601: The entire economy is called inflation . When prices decrease, there is deflation . Economists measure these changes in prices with price indexes . Inflation will increase when an economy becomes overheated and grows too quickly. Similarly, a declining economy can lead to decreasing inflation and even in some cases deflation. Central bankers conducting monetary policy usually have as a main priority to avoid too high inflation, typically by adjusting interest rates. High inflation as well as deflation can lead to increased uncertainty and other negative consequences, in particular when
12325-463: The exogenous technological improvement used to explain growth in Solow's model. Another type of endogenous growth models endogenized the process of technological progress by modelling research and development activities by profit-maximizing firms explicitly within the growth models themselves. Since the 1970s, various environmental problems have been integrated into growth and other macroeconomic models to study their implications more thoroughly. During
12470-401: The fall in market income. There is a general consensus that both monetary and fiscal instruments may affect demand and activity in the short run (i.e. over the business cycle). Economists usually favor monetary over fiscal policy to mitigate moderate fluctuations, however, because it has two major advantages. First, monetary policy is generally implemented by independent central banks instead of
12615-647: The first large-scale macroeconometric model , applying the Keynesian thinking systematically to the US economy . Immediately after World War II, Keynesian was the dominant economic view of the United States establishment and its allies, Marxian economics was the dominant economic view of the Soviet Union nomenklatura and its allies. Monetarism appeared in the 1950s and 1960s, its intellectual leader being Milton Friedman . Monetarists contended that monetary policy and other monetary shocks, as represented by
12760-476: The first examples of general equilibrium models based on microeconomic foundations and a specification of underlying shocks that aim to explain the main features of macroeconomic fluctuations, not only qualitatively, but also quantitatively. In this way, they were forerunners of the later DSGE models. New Keynesian economists responded to the new classical school by adopting rational expectations and focusing on developing micro-founded models that were immune to
12905-493: The following decades, many economists followed Keynes' ideas and expanded on his works. John Hicks and Alvin Hansen developed the IS–LM model which was a simple formalisation of some of Keynes' insights on the economy's short-run equilibrium. Franco Modigliani and James Tobin developed important theories of private consumption and investment , respectively, two major components of aggregate demand . Lawrence Klein built
13050-459: The following division: Separate literatures have developed to describe both natural capital and social capital . Such terms reflect a wide consensus that nature and society both function in such a similar manner as traditional industrial infrastructural capital, that it is entirely appropriate to refer to them as different types of capital in themselves. In particular, they can be used in the production of other goods, are not used up immediately in
13195-509: The global economy . Other broad distinctions within economics include those between positive economics , describing "what is", and normative economics , advocating "what ought to be"; between economic theory and applied economics ; between rational and behavioural economics ; and between mainstream economics and heterodox economics . Economic analysis can be applied throughout society, including business , finance , cybersecurity , health care , engineering and government . It
13340-428: The government takes on spending projects, it limits the amount of resources available for the private sector to use. Full crowding out occurs in the extreme case when government spending simply replaces private sector output instead of adding additional output to the economy. A crowding out effect may also occur if government spending should lead to higher interest rates, which would limit investment. Some fiscal policy
13485-424: The growth in the money stock, was an important cause of economic fluctuations, and consequently that monetary policy was more important than fiscal policy for purposes of stabilisation . Friedman was also skeptical about the ability of central banks to conduct a sensible active monetary policy in practice, advocating instead using simple rules such as a steady rate of money growth. Monetarism rose to prominence in
13630-463: The importance of various market failures for the functioning of the economy, as had Keynes. Not least, they proposed various reasons that potentially explained the empirically observed features of price and wage rigidity , usually made to be endogenous features of the models, rather than simply assumed as in older Keynesian-style ones. After decades of often heated discussions between Keynesians, monetarists, new classical and new Keynesian economists,
13775-497: The inflation (or deflation) is unexpected. Consequently, most central banks aim for a positive, but stable and not very high inflation level. Changes in the inflation level may be the result of several factors. Too much aggregate demand in the economy will cause an overheating , raising inflation rates via the Phillips curve because of a tight labor market leading to large wage increases which will be transmitted to increases in
13920-537: The interest rate is changed differs from central bank to central bank, but typically the implementation happens either directly via administratively changing the central bank's own offered interest rates or indirectly via open market operations . Via the monetary transmission mechanism , interest rate changes affect investment , consumption , asset prices like stock prices and house prices , and through exchange rate reactions export and import . In this way aggregate demand , employment and ultimately inflation
14065-463: The late 1990s, economists had reached a rough consensus. The market imperfections and nominal rigidities of new Keynesian theory was combined with rational expectations and the RBC methodology to produce a new and popular type of models called dynamic stochastic general equilibrium (DSGE) models. The fusion of elements from different schools of thought has been dubbed the new neoclassical synthesis . These models are now used by many central banks and are
14210-437: The literature. Capital goods are generally considered one-of-a-kind, capital intensive products that consist of many components. They are often used as manufacturing systems or services themselves. Examples include hand tools , machine tools , data centers , oil rigs , semiconductor fabrication plants , and wind turbines . Their production is often organized in projects, with several parties cooperating in networks. This
14355-445: The literature; classical economics , neoclassical economics , Keynesian economics , the neoclassical synthesis , monetarism , new classical economics , New Keynesian economics and the new neoclassical synthesis . Capital (economics) In economics , capital goods or capital are "those durable produced goods that are in turn used as productive inputs for further production" of goods and services. A typical example
14500-417: The macro economy. RBC models were created by combining fundamental equations from neo-classical microeconomics to make quantitative models. In order to generate macroeconomic fluctuations, RBC models explained recessions and unemployment with changes in technology instead of changes in the markets for goods or money. Critics of RBC models argue that technological changes, which typically diffuse slowly throughout
14645-434: The macro/micro divide is institutionalized in the field of economics. Most economists identify as either macro- or micro-economists. Macroeconomics is traditionally divided into topics along different time frames: the analysis of short-term fluctuations over the business cycle , the determination of structural levels of variables like inflation and unemployment in the medium (i.e. unaffected by short-term deviations) term, and
14790-449: The market's two roles: allocation of resources and distribution of income. The market might be efficient in allocating resources but not in distributing income, he wrote, making it necessary for society to intervene. Value theory was important in classical theory. Smith wrote that the "real price of every thing ... is the toil and trouble of acquiring it". Smith maintained that, with rent and profit, other costs besides wages also enter
14935-478: The money market is modeled as giving equilibrium between the money supply and liquidity preference (equivalent to money demand). Economics Economics ( / ˌ ɛ k ə ˈ n ɒ m ɪ k s , ˌ iː k ə -/ ) is a social science that studies the production , distribution , and consumption of goods and services . Economics focuses on the behaviour and interactions of economic agents and how economies work. Microeconomics analyses what
15080-437: The most famous passages in all economics," Smith represents every individual as trying to employ any capital they might command for their own advantage, not that of the society, and for the sake of profit, which is necessary at some level for employing capital in domestic industry, and positively related to the value of produce. In this: He generally, indeed, neither intends to promote the public interest, nor knows how much he
15225-420: The new classical real business cycle models , microfounded computable general equilibrium (CGE) models used for medium-term (structural) questions like international trade or tax reforms, Dynamic stochastic general equilibrium (DSGE) models used to analyze business cycles, not least in many central banks, or integrated assessment models like DICE . The IS–LM model, invented by John Hicks in 1936, gives
15370-561: The oil crises of the 1970s when scarcity problems of natural resources were high on the public agenda, economists like Joseph Stiglitz and Robert Solow introduced non-renewable resources into neoclassical growth models to study the possibilities of maintaining growth in living standards under these conditions. More recently, the issue of climate change and the possibilities of a sustainable development are examined in so-called integrated assessment models , pioneered by William Nordhaus . In macroeconomic models in environmental economics ,
15515-605: The only usable tool for such countries. Macroeconomic teaching, research and informed debates normally evolve around formal ( diagrammatic or equational ) macroeconomic models to clarify assumptions and show their consequences in a precise way. Models include simple theoretical models, often containing only a few equations, used in teaching and research to highlight key basic principles, and larger applied quantitative models used by e.g. governments, central banks, think tanks and international organisations to predict effects of changes in economic policy or other exogenous factors or as
15660-479: The original simple Phillips curve relationship between inflation and unemployment. Friedman and Edmund Phelps (who was not a monetarist) proposed an "augmented" version of the Phillips curve that excluded the possibility of a stable, long-run tradeoff between inflation and unemployment. When the oil shocks of the 1970s created a high unemployment and high inflation, Friedman and Phelps were vindicated. Monetarism
15805-503: The pessimistic analysis of Malthus (1798). John Stuart Mill (1844) delimited the subject matter further: The science which traces the laws of such of the phenomena of society as arise from the combined operations of mankind for the production of wealth, in so far as those phenomena are not modified by the pursuit of any other object. Alfred Marshall provided a still widely cited definition in his textbook Principles of Economics (1890) that extended analysis beyond wealth and from
15950-462: The political institutions that control fiscal policy. Independent central banks are less likely to be subject to political pressures for overly expansionary policies. Second, monetary policy may suffer shorter inside lags and outside lags than fiscal policy. There are some exceptions, however: Firstly, in the case of a major shock, monetary stabilization policy may not be sufficient and should be supplemented by active fiscal stabilization. Secondly, in
16095-487: The present, modified by substituting the word "wealth" for "goods and services" meaning that wealth may include non-material objects as well. One hundred and thirty years later, Lionel Robbins noticed that this definition no longer sufficed, because many economists were making theoretical and philosophical inroads in other areas of human activity. In his Essay on the Nature and Significance of Economic Science , he proposed
16240-447: The price level are directly caused by changes in the money supply . Whereas there is empirical evidence that there is a long-run positive correlation between the growth rate of the money stock and the rate of inflation, the quantity theory has proved unreliable in the short- and medium-run time horizon relevant to monetary policy and is abandoned as a practical guideline by most central banks today. Open economy macroeconomics deals with
16385-409: The price of a commodity. Other classical economists presented variations on Smith, termed the ' labour theory of value '. Classical economics focused on the tendency of any market economy to settle in a final stationary state made up of a constant stock of physical wealth (capital) and a constant population size . Marxist (later, Marxian) economics descends from classical economics and it derives from
16530-517: The price of the products of employers. Too little aggregate demand will have the opposite effect of creating more unemployment and lower wages, thereby decreasing inflation. Aggregate supply shocks will also affect inflation, e.g. the oil crises of the 1970s and the 2021–2023 global energy crisis . Changes in inflation may also impact the formation of inflation expectations , creating a self-fulfilling inflationary or deflationary spiral. The monetarist quantity theory of money holds that changes in
16675-425: The process of production, and can be enhanced (if not created) by human effort. There is also a literature of intellectual capital and intellectual property law . However, this increasingly distinguishes means of capital investment, and collection of potential rewards for patent , copyright (creative or individual capital ), and trademark (social trust or social capital) instruments. Building on Marx, and on
16820-406: The producer, and their purchase is usually referred to as a capital expense. These goods are important to businesses because they use these items to make functional goods for customers or to provide consumers with valuable services. As a result, they are sometimes referred to as producers' goods, production goods, or means of production. In the theory of international trade, the causes and nature of
16965-403: The production of a product (e.g., machines and storage facilities), while the latter referred to physical assets consumed in the process of production (e.g., raw materials and intermediate products). For an enterprise, both were types of capital. Economist Henry George argued that financial instruments like stocks, bonds, mortgages, promissory notes, or other certificates for transferring wealth
17110-491: The production of dump trucks. Consumption is the logical result of all economic activity, but the level of future consumption depends on the future capital stock, and this in turn depends on the current level of production in the capital-goods sector. Hence if there is a desire to increase consumption, the output of the capital goods should be maximized. Capital goods, often called complex products and systems (CoPS), play an important role in today's economy. Aside from allowing
17255-730: The production process. Since at least the 1960s economists have increasingly focused on broader forms of capital. For example, investment in skills and education can be viewed as building up human capital or knowledge capital , and investments in intellectual property can be viewed as building up intellectual capital . Natural capital is the world's stock of natural resources, which includes geology, soils, air, water and all living organisms. These terms lead to certain questions and controversies discussed in those articles. A capital good lifecycle typically consists of tendering, engineering and procurement, manufacturing, commissioning, maintenance, and (sometimes) decommissioning. Capital goods are
17400-429: The purest approximation to the truth that has yet been published" on the subject. The publication of Adam Smith 's The Wealth of Nations in 1776, has been described as "the effective birth of economics as a separate discipline." The book identified land, labour, and capital as the three factors of production and the major contributors to a nation's wealth, as distinct from the physiocratic idea that only agriculture
17545-414: The same predictions even as the underlying model generating the data changed. He advocated models based on fundamental economic theory (i.e. having an explicit microeconomic foundation ) that would, in principle, be structurally accurate as economies changed. Following Lucas's critique, new classical economists, led by Edward C. Prescott and Finn E. Kydland , created real business cycle (RBC) models of
17690-493: The savings rate leads to a temporary increase as the economy creates more capital, which adds to output. However, eventually the depreciation rate will limit the expansion of capital: savings will be used up replacing depreciated capital, and no savings will remain to pay for an additional expansion in capital. Solow's model suggests that economic growth in terms of output per capita depends solely on technological advances that enhance productivity. The Solow model can be interpreted as
17835-412: The scope and method of economics, emanating from that definition. A body of theory later termed "neoclassical economics" formed from about 1870 to 1910. The term "economics" was popularised by such neoclassical economists as Alfred Marshall and Mary Paley Marshall as a concise synonym for "economic science" and a substitute for the earlier " political economy ". This corresponded to the influence on
17980-486: The so-called Lucas critique and the presentation of real business cycle models . During the 1980s, a group of researchers appeared being called New Keynesian economists , including among others George Akerlof , Janet Yellen , Gregory Mankiw and Olivier Blanchard . They adopted the principle of rational expectations and other monetarist or new classical ideas such as building upon models employing micro foundations and optimizing behaviour, but simultaneously emphasised
18125-444: The source of the word economy. Joseph Schumpeter described 16th and 17th century scholastic writers, including Tomás de Mercado , Luis de Molina , and Juan de Lugo , as "coming nearer than any other group to being the 'founders' of scientific economics" as to monetary , interest , and value theory within a natural-law perspective. Two groups, who later were called "mercantilists" and "physiocrats", more directly influenced
18270-406: The state or commonwealth with a revenue for the publick services. Jean-Baptiste Say (1803), distinguishing the subject matter from its public-policy uses, defined it as the science of production, distribution, and consumption of wealth . On the satirical side, Thomas Carlyle (1849) coined " the dismal science " as an epithet for classical economics , in this context, commonly linked to
18415-749: The study of long-term economic growth. It also studies the consequences of policies targeted at mitigating fluctuations like fiscal or monetary policy , using taxation and government expenditure or interest rates, respectively, and of policies that can affect living standards in the long term, e.g. by affecting growth rates. Macroeconomics as a separate field of research and study is generally recognized to start in 1936, when John Maynard Keynes published his The General Theory of Employment, Interest and Money , but its intellectual predecessors are much older. Since World War II, various macroeconomic schools of thought like Keynesians , monetarists , new classical and new Keynesian economists have made contributions to
18560-408: The subject of mathematical methods used in the natural sciences . Neoclassical economics systematically integrated supply and demand as joint determinants of both price and quantity in market equilibrium, influencing the allocation of output and income distribution. It rejected the classical economics' labour theory of value in favour of a marginal utility theory of value on the demand side and
18705-402: The subject or different views among economists. Scottish philosopher Adam Smith (1776) defined what was then called political economy as "an inquiry into the nature and causes of the wealth of nations", in particular as: a branch of the science of a statesman or legislator [with the twofold objectives of providing] a plentiful revenue or subsistence for the people ... [and] to supply
18850-471: The subject": Economics is the science which studies human behaviour as a relationship between ends and scarce means which have alternative uses. Robbins described the definition as not classificatory in "pick[ing] out certain kinds of behaviour" but rather analytical in "focus[ing] attention on a particular aspect of behaviour, the form imposed by the influence of scarcity ." He affirmed that previous economists have usually centred their studies on
18995-826: The subsequent development of the subject. Both groups were associated with the rise of economic nationalism and modern capitalism in Europe. Mercantilism was an economic doctrine that flourished from the 16th to 18th century in a prolific pamphlet literature, whether of merchants or statesmen. It held that a nation's wealth depended on its accumulation of gold and silver. Nations without access to mines could obtain gold and silver from trade only by selling goods abroad and restricting imports other than of gold and silver. The doctrine called for importing inexpensive raw materials to be used in manufacturing goods, which could be exported, and for state regulation to impose protective tariffs on foreign manufactured goods and prohibit manufacturing in
19140-410: The synthesis view of the macroeconomy. Economists like Paul Samuelson , Franco Modigliani , James Tobin , and Robert Solow developed formal Keynesian models and contributed formal theories of consumption, investment, and money demand that fleshed out the Keynesian framework. Milton Friedman updated the quantity theory of money to include a role for money demand. He argued that the role of money in
19285-476: The theories of the sociologist and philosopher Pierre Bourdieu , scholars have recently argued for the significance of "culinary capital" in the arena of food. The idea is that the production, consumption, and distribution of knowledge about food can confer power and status. Within classical economics, Adam Smith ( Wealth of Nations , Book II, Chapter 1) distinguished fixed capital from circulating capital . The former designated physical assets not consumed in
19430-467: The trade of capital goods receive little attention. Trade-in capital goods is a crucial part of the dynamic relationship between international trade and development. The production and trade of capital goods, as well as consumer goods, must be introduced to trade models, and the entire analysis integrated with domestic capital accumulation theory. Detailed classifications of capital that have been used in various theoretical or applied uses generally respect
19575-504: The two most general fields in economics. The focus of macroeconomics is often on a country (or larger entities like the whole world) and how its markets interact to produce large-scale phenomena that economists refer to as aggregate variables. In microeconomics the focus of analysis is often a single market, such as whether changes in supply or demand are to blame for price increases in the oil and automotive sectors. From introductory classes in "principles of economics" through doctoral studies,
19720-418: The underpinnings of aggregate demand (itself discussed below). It answers the question "At any given price level, what is the quantity of goods demanded?" The graphic model shows combinations of interest rates and output that ensure equilibrium in both the goods and money markets under the model's assumptions. The goods market is modeled as giving equality between investment and public and private saving (IS), and
19865-467: The war is not winnable or if the expected costs outweigh the benefits, the deciding actors (assuming they are rational) may never go to war (a decision ) but rather explore other alternatives. Economics cannot be defined as the science that studies wealth, war, crime, education, and any other field economic analysis can be applied to; but, as the science that studies a particular common aspect of each of those subjects (they all use scarce resources to attain
20010-515: The word Oikos , the Greek word from which the word economy derives, was used for issues regarding how to manage a household (which was understood to be the landowner, his family, and his slaves ) rather than to refer to some normative societal system of distribution of resources, which is a more recent phenomenon. Xenophon , the author of the Oeconomicus , is credited by philologues for being
20155-400: The word "macroeconomics" itself in a journal title in 1946. but naturally several of the themes which are central to macroeconomic research had been discussed by thoughtful economists and other writers long before 1936. In particular, macroeconomic questions before Keynes were the topic of the two long-standing traditions of business cycle theory and monetary theory . William Stanley Jevons
20300-460: The work of Karl Marx . The first volume of Marx's major work, Das Kapital , was published in 1867. Marx focused on the labour theory of value and theory of surplus value . Marx wrote that they were mechanisms used by capital to exploit labour. The labour theory of value held that the value of an exchanged commodity was determined by the labour that went into its production, and the theory of surplus value demonstrated how workers were only paid
20445-421: Was no part of it. By pursuing his own interest he frequently promotes that of the society more effectually than when he really intends to promote it. The Reverend Thomas Robert Malthus (1798) used the concept of diminishing returns to explain low living standards. Human population , he argued, tended to increase geometrically, outstripping the production of food, which increased arithmetically. The force of
20590-467: Was one of the pioneers of the first tradition, whereas the quantity theory of money , labelled the oldest surviving theory in economics, as an example of the second was described already in the 16th century by Martín de Azpilcueta and later discussed by personalities like John Locke and David Hume . In the first decades of the 20th century monetary theory was dominated by the eminent economists Alfred Marshall , Knut Wicksell and Irving Fisher . When
20735-415: Was particularly influential in the early 1980s, but fell out of favor when central banks found the results disappointing when trying to target money supply instead of interest rates as monetarists recommended, concluding that the relationships between money growth, inflation and real GDP growth are too unstable to be useful in practical monetary policy making. New classical macroeconomics further challenged
20880-892: Was productive. Smith discusses potential benefits of specialisation by division of labour , including increased labour productivity and gains from trade , whether between town and country or across countries. His "theorem" that "the division of labor is limited by the extent of the market" has been described as the "core of a theory of the functions of firm and industry " and a "fundamental principle of economic organization." To Smith has also been ascribed "the most important substantive proposition in all of economics" and foundation of resource-allocation theory—that, under competition , resource owners (of labour, land, and capital) seek their most profitable uses, resulting in an equal rate of return for all uses in equilibrium (adjusted for apparent differences arising from such factors as training and unemployment). In an argument that includes "one of
21025-437: Was recognised as well as the traditional Keynesian insistence that fiscal policy could also play an influential role in affecting aggregate demand . Methodologically, the synthesis led to a new class of applied models, known as dynamic stochastic general equilibrium or DSGE models, descending from real business cycles models, but extended with several new Keynesian and other features. These models proved useful and influential in
#804195