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98-620: The United States census (plural censuses or census) is a census that is legally mandated by the Constitution of the United States . It takes place every ten years. The first census after the American Revolution was taken in 1790 under Secretary of State Thomas Jefferson . There have been 23 federal censuses since that time. The census includes territories of the United States . The United States Census Bureau

196-660: A base-10 positional system. On May 25, 1577, King Philip II of Spain ordered by royal cédula the preparation of a general description of Spain's holdings in the Indies. Instructions and a questionnaire, issued in 1577 by the Office of the Cronista Mayor, were distributed to local officials in the Viceroyalties of New Spain and Peru to direct the gathering of information. The questionnaire, composed of fifty items,

294-544: A census for tax purposes, which was partially responsible for the development of the Zealot movement and several failed rebellions against Rome ultimately ending in the Jewish Diaspora . The Gospel of Luke makes reference to Quirinius' census in relation to the birth of Jesus ; based on variant readings of this passage, a minority of biblical scholars, including N. T. Wright , speculate that this passage refers to

392-639: A presidential memorandum ordering the exclusion of illegal immigrants from the numbers in the 2020 census that are used to apportion seats in the House of Representatives. The COVID-19 pandemic made the collection of the census results difficult, and the department had extended the deadline to complete collection to October 31 instead of July 31, 2020. On August 3, the department announced its Replan Schedule that would end collection early on September 30, aware this would leave them with incomplete data that they would have to estimate total numbers to complete. This move

490-408: A sampling frame such as an address register. Census counts are necessary to adjust samples to be representative of a population by weighting them as is common in opinion polling . Similarly, stratification requires knowledge of the relative sizes of different population strata, which can be derived from census enumerations. In some countries, the census provides the official counts used to apportion

588-412: A sampling frame to count the population. This is the only way to be sure that everyone has been included, as otherwise those not responding would not be followed up on and individuals could be missed. The fundamental premise of a census is that the population is not known, and a new estimate is to be made by the analysis of primary data. The use of a sampling frame is counterintuitive as it suggests that

686-480: A "permanent" address, which might be a family home for students or long-term migrants. A precise definition of residence is needed, to decide whether visitors to a country should be included in the population count. This is becoming more important as students travel abroad for education for a period of several years. Other groups causing problems with enumeration are newborn babies, refugees, people away on holiday, people moving home around census day, and people without

784-714: A census was taken in Virginia , and people were counted in almost all of the British colonies that became the United States . Between 1781 and 1786, the first "actual enumeration" was conducted separately in each state and compiled by John Kean for consideration at the Constitutional Convention in 1787. Throughout the years, the country's needs and interests became more complicated. This meant that statistics were needed to help people understand what

882-477: A clan or tribe, or by a juridical person such as a corporation, cooperative, or government agency. The holding's land may consist of one or more parcels, located in one or more separate areas or one or more territorial or administrative divisions, providing the parcels share the same production means, such as labor, farm buildings, machinery or draught animals. Historical censuses used crude enumeration assuming absolute accuracy. Modern approaches take into account

980-450: A coherent snapshot and avoid double counting. The actual census-taking begins before this date and extends for months thereafter. In 2020, the earliest responses were collected starting January 21 in remote parts of Alaska, and March 12 for most Americans. In addition to its primary purpose of reapportioning the House of Representatives, census data are used for a wide variety of applications, including: The census has historically and up to

1078-415: A family home during vacations, or children whose parents have separated who effectively have two family homes. Census enumeration has always been based on finding people where they live, as there is no systematic alternative: any list used to find people is likely to be derived from census activities in the first place. Recent UN guidelines provide recommendations on enumerating such complex households. In

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1176-510: A fishing analogy can be found in "Trout, Catfish and Roach..." which won an award from the Royal Statistical Society for excellence in official statistics in 2011. Triple system enumeration has been proposed as an improvement as it would allow evaluation of the statistical dependence of pairs of sources. However, as the matching process is the most difficult aspect of census estimation this has never been implemented for

1274-414: A fixed address. People with second homes, because they are working in another part of the country or have a holiday cottage, are difficult to fix at a particular address; this sometimes causes double counting or houses being mistakenly identified as vacant. Another problem is where people use a different address at different times e.g. students living at their place of education in term time but returning to

1372-500: A large city, it might be appropriate to give the average income for black males aged between 50 and 60. However, doing this for a town that only has two black males in this age group would be a breach of privacy because either of those persons, knowing his own income and the reported average, could determine the other man's income. Typically, census data are processed to obscure such individual information. Some agencies do this by intentionally introducing small statistical errors to prevent

1470-404: A larger system of different surveys. Although population estimates remain an important function of a census, including exactly the geographic distribution of the population or the agricultural population, statistics can be produced about combinations of attributes, e.g., education by age and sex in different regions. Current administrative data systems allow for other approaches to enumeration with

1568-469: A national enumeration. It would also be difficult to identify three different sources that were sufficiently different to make the triple system effort worthwhile. The DSE approach has another weakness in that it assumes there is no person counted twice (over count). In de facto residence definitions this would not be a problem but in de jure definitions individuals risk being recorded on more than one form leading to double counting. A particular problem here

1666-802: A number of controversies and legal challenges under the Trump administration due to President Donald Trump 's policies on illegal immigration, particularly those undocumented in the country. Prior to the publication of the census, the Commerce Department stated its intention to add a question asking responders about their immigration status, which many states and activists stated would cause illegal immigrants to not respond out of fear of prosecution and lead to undercounting, affecting state representation and federal funding. The Supreme Court case Department of Commerce v. New York , decided in June 2019, found

1764-433: A population and housing census – numbers of people, their distribution, their living conditions and other key data – is critical for development." This is because this type of data is essential for policymakers so that they know where to invest. Many countries have outdated or inaccurate data about their populations and thus have difficulty in addressing the needs of the population. The UNFPA said: "The unique advantage of

1862-528: A practice called " hot-deck imputation ." The use of hot-deck imputation in the 2000 census increased the population of North Carolina by 0.4% and Utah by 0.2%. Due to the practice, during the reapportionment of the US House of Representatives Utah received one less seat and North Carolina gained a seat. Utah sought an injunction requiring the Bureau to revise the published census results to those without

1960-460: A realist approach to measurement, acknowledging that under any definition of residence there is a true value of the population but this can never be measured with complete accuracy. An important aspect of the census process is to evaluate the quality of the data. Many countries use a post-enumeration survey to adjust the raw census counts. This works similarly to capture-recapture estimation for animal populations. Among census experts, this method

2058-704: A separate registration conducted during the reign of Herod the Great , several years before Quirinius' census. The 15-year indiction cycle established by Diocletian in AD   297 was based on quindecennial censuses and formed the basis for dating in late antiquity and under the Byzantine Empire . In the Middle Ages , the Caliphate began conducting regular censuses soon after its formation, beginning with

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2156-489: A snapshot of life spans and causes of death throughout the country. The first nine censuses (1790–1870) were conducted by U.S. Marshals before the Census Bureau was created. Appointed U.S. Marshals of each judicial district hired assistant marshals to conduct the actual enumeration. The census enumerators were typically from the village or neighborhood and often knew the residents. Before enabling self-identification on

2254-453: Is called dual system enumeration (DSE). A sample of households is visited by interviewers who record the details of the household as of census day. These data are then matched to census records, and the number of people missed can be estimated by considering the number of people who are included in one count but not the other. This allows adjustments to the count for non-response, varying between different demographic groups. An explanation using

2352-787: Is controversial; up to one-third of all U.S. residents do not respond to repeated reminders. In recent censuses, the nonresponse rate has been less than 1% (it was about 0.4% in 2010), but during the 2020 census, as of September 11, many experts believed the nonresponse rate could reach double digits. By October 19, 2020, all states had topped a 99% response rate, with all but one state having a nonresponse rate below 0.1%. The Census Bureau estimates that in 1970 over six percent of African Americans went uncounted, whereas only around two percent of European Americans went uncounted. Democrats often argue that modern sampling techniques should be used so that more accurate and complete data can be inferred. Republicans often argue against such sampling techniques, stating

2450-401: Is important in considering individuals who have multiple or temporary addresses. Every person should be identified uniquely as a resident in one place; but the place where they happen to be on Census Day, their de facto residence , may not be the best place to count them. Where an individual uses services may be more useful, and this is at their usual residence. An individual may be recorded at

2548-469: Is interested; researchers in particular have an interest in the role of Census Field Officers (CFO) and their assistants. Data can be represented visually or analysed in complex statistical models, to show the difference between certain areas, or to understand the association between different personal characteristics. Census data offer a unique insight into small areas and small demographic groups which sample data would be unable to capture with precision. In

2646-533: Is mandated by Article I , Section 2 of the United States Constitution , which states: " Representatives and direct Taxes shall be apportioned among the several States... according to their respective Numbers... . The actual Enumeration shall be made within three years after the first meeting of the Congress of the United States , and within every subsequent Term of ten Years". Section 2 of

2744-714: Is named after the counting of the Israelite population according to the house of the Fathers after the exodus from Egypt. A second census was taken while the Israelites were camped in the " plains of Moab ". King David performed a census that produced disastrous results. His son, King Solomon , had all of the foreigners in Israel counted. One of the world's earliest preserved censuses was held in China in AD   2 during

2842-538: Is not known if there are any residents or how many people there are in each household. Depending on the mode of enumeration, a form is sent to the householder, an enumerator calls, or administrative records for the dwelling are accessed. As a preliminary to the dispatch of forms, census workers will check for any address problems on the ground. While it may seem straightforward to use the postal service file for this purpose, this can be out of date and some dwellings may contain several independent households. A particular problem

2940-473: Is of Latin origin: during the Roman Republic , the census was a list of all adult males fit for military service. The modern census is essential to international comparisons of any type of statistics, and censuses collect data on many attributes of a population, not just the number of individuals. Censuses typically began as the only method of collecting national demographic data and are now part of

3038-980: Is part of the United States Department of Commerce . Title 13 of the United States Code governs how the census is conducted and how its data are handled. Information is confidential as per 13 U.S.C.   § 9 . The census law, coupled with the Sentencing Reform Act of 1984 ( Title 18 of the United States Code , Sections 3551, 3559, and 3571), provides for penalties of up to $ 5,000 for not responding or for willfully providing false answers to any question. Decennial U.S. census figures are based on actual counts of persons dwelling in U.S. residential structures. They include citizens, non-citizen legal residents, non-citizen long-term visitors and undocumented immigrants. The Census Bureau bases its decision about whom to count on

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3136-458: Is responsible for conducting the census. The most recent national census took place in 2020; the next census is scheduled for 2030. Since 2013, the Census Bureau began discussions on using technology to aid data collection starting with the 2020 census. In 2020, every household received an invitation to complete the census over the Internet, by phone or by paper questionnaire. For years between

3234-423: Is still conducted in a similar way to the post-enumeration survey employed in a traditional census. Other countries that have a population register use this as a basis for all the census statistics needed by users. This is most common among Nordic countries but requires many distinct registers to be combined, including population, housing, employment, and education. These registers are then combined and brought up to

3332-415: Is students who often have a term time and family address. Several countries have used a system known as short form/long form. This is a sampling strategy that randomly chooses a proportion of people to send a more detailed questionnaire to (the long form). Everyone receives the short-form questions. This means more data are collected, but without imposing a burden on the whole population. This also reduces

3430-477: Is that it was chosen in 1952 as slightly higher than the average female life expectancy, 71.6. Another explanation (which disputes the life expectancy number) is that this number is a holdover from 1942, when a disagreement between the Census Bureau and the National Archives was resolved with 1870 as the boundary between confidential and public records. The individual census data most recently released to

3528-491: Is typically collected about the household structure and the housing. For this reason, international documents refer to censuses of population and housing. Normally the census response is made by a household, indicating details of individuals resident there. An important aspect of census enumerations is determining which individuals can be counted and which cannot be counted. Broadly, three definitions can be used: de facto residence; de jure residence; and permanent residence. This

3626-416: Is what is termed " communal establishments ", a category that includes student residences, religious orders, homes for the elderly, people in prisons, etc. As these are not easily enumerated by a single householder, they are often treated differently and visited by special teams of census workers to ensure they are classified appropriately. Individuals are normally counted within households , and information

3724-579: The Fourteenth Amendment amended Article I, Section 2 to include that the "respective Numbers" of the "several States" will be determined by "counting the whole number of persons in each State, excluding Indians not taxed." The United States Census Bureau (officially the Bureau of the Census, as defined in Title 13 U.S.C. § 11) is responsible for the United States census. The Bureau of the Census

3822-553: The Han dynasty , and is still considered by scholars to be quite accurate. The population was registered as having 57,671,400 individuals in 12,366,470 households but on this occasion only taxable families had been taken into account, indicating the income and the number of soldiers who could be mobilized. Another census was held in AD   144. The oldest recorded census in India is thought to have occurred around 330   BC during

3920-465: The United States Constitution 's requirement of an "actual enumeration" for the purpose of apportioning Representatives. In an 8–1 ruling, the Supreme Court rejected Utah's arguments and affirmed the district court's opinion. In the majority opinion Justice Breyer reasoned that hot-deck imputation did not constitute sampling, which attempts to extrapolate statistics about a large population from

4018-649: The United States census does not violate 13 USC §195 or the Census Clause of the Constitution. The case was brought against Donald L. Evans , et al. by the state of Utah ; Evans was the U.S. Secretary of Commerce at the time. In instances where the Census Bureau remained unsure of the number of residents at an address after a field visit, the Bureau inferred its population characteristics with statistics taken from its nearest similar neighbor,

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4116-692: The nomarch , "whence he gained his living". Under the Ptolemies and the Romans several censuses were conducted in Egypt by government officials. There are several accounts of ancient Greek city states carrying out censuses. Censuses are mentioned several times in the Biblical narrative. God commands a per capita tax to be paid with the census for the upkeep of the Tabernacle . The Book of Numbers

4214-437: The population size is already known. However, a census is also used to collect attribute data on the individuals in the nation, not only to assess population size. This process of sampling marks the difference between a historical census, which was a house-to-house process or the product of an imperial decree, and the modern statistical project. The sampling frame used by a census is almost always an address register. Thus, it

4312-412: The 19th and 20th centuries collected paper documents which had to be collated by hand, so the statistical information obtained was quite basic. The government that owned the data could publish statistics on the state of the nation. The results were used to measure changes in the population and apportion representation. Population estimates could be compared to those of other countries. By the beginning of

4410-437: The 20th century, censuses were recording households and some indications of their employment. In some countries, census archives are released for public examination after many decades, allowing genealogists to track the ancestry of interested people. Archives provide a substantial historical record which may challenge established views. Information such as job titles and arrangements for the destitute and sick may also shed light on

4508-447: The Census Bureau headcount, the volume of scheduled publications, and the use of Hollerith's electromechanical tabulators) was to reduce the time required to fully process the census from eight years for the 1880 census to six years for the 1890 census. The total population, of 62,947,714, was announced after only six weeks of processing (punched cards were not used for this family, or rough , count). The public reaction to this tabulation

4606-564: The FBI, has access to census data. The census records data specific to individual respondents are not available to the public until 72 years after a given census was taken, but aggregate statistical data derived from the census are released as soon as they are available. Every census up to and including 1950 is currently available to the public and can be viewed on microfilm released by the National Archives and Records Administration ,

4704-516: The U.S. Constitution requires an "actual enumeration" for apportionment of House seats, and that political appointees would be tempted to manipulate the sampling formulas. Groups like the Prison Policy Initiative assert that the census practice of counting prisoners as residents of prisons, not their pre-incarceration addresses, leads to misleading information about racial demographics and population numbers. The 2020 census drew

4802-526: The U.S. House of Representatives ". According to the Census Bureau, "Census Day" has been April 1 since 1930. Previously, from 1790 to 1820, the census counted the population as of the first Monday in August. It moved to June 1 in 1830, (June 2 in 1890), April 15 in 1910, and January 1 in 1920. Because people are born, die, and move during the year, the census counts people where they were or expect to be living on this specific reference date in an attempt to get

4900-463: The UK, all census formats are scanned and stored electronically before being destroyed, replacing the need for physical archives. The record linking to perform an administrative census would not be possible without large databases being stored on computer systems. There are sometimes problems in introducing new technology. The US census had been intended to use handheld computers, but cost escalated, and this

4998-578: The US census, including Department of Commerce v. United States House of Representatives, 525 U.S. 316 (1999), a suit which followed President Clinton's veto of a law passed by Congress intending to explicitly prohibit sampling, and Wisconsin v. City of New York, 517 U.S. 1 (1996), which ruled that sampling was not required by the Enumeration clause. This article related to the Supreme Court of

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5096-499: The Union, as well as to other areas under U.S. sovereignty or jurisdiction. There were so many more inquiries of all kinds in the census of 1880 that almost a full decade was needed to publish all the results. In response to this, the census was mechanized in 1890, with tabulating machines made by Herman Hollerith . This reduced the processing time to two and a half years. For the first six censuses (1790–1840), enumerators recorded only

5194-413: The United States for the presentation of data. Census The UN 's Food and Agriculture Organization (FAO), in turn, defines the census of agriculture as "a statistical operation for collecting, processing and disseminating data on the structure of agriculture, covering the whole or a significant part of a country." "In a census of agriculture, data are collected at the holding level." The word

5292-417: The burden on the statistical office. Indeed, in the UK until 2001 all residents were required to fill in the whole form but only a 10% sample was coded and analysed in detail. New technology means that all data are now scanned and processed. During the 2011 Canadian census there was controversy about the cessation of the mandatory long-form census; the head of Statistics Canada , Munir Sheikh , resigned upon

5390-521: The case Trump v. New York for an expedited hearing in November, given the results are to be delivered to Congress by December 31, 2020. The Court issued a per curiam decision on December 18, 2020, which vacated the District Court's ruling and remanded the case to that court with orders to dismiss it. Censuses had been taken prior to the Constitution's ratification; in the early 17th century,

5488-420: The census even though they may vote. Only Americans living abroad who are "federal employees (military and civilian) and their dependents living overseas with them" are counted. "Private U.S. citizens living abroad who are not affiliated with the federal government (either as employees or their dependents) will not be included in the overseas counts. These overseas counts are used solely for reapportioning seats in

5586-438: The census is also an important tool for identifying forms of social, demographic or economic exclusions, such as inequalities relating to race, ethics, and religion as well as disadvantaged groups such as those with disabilities and the poor. An accurate census can empower local communities by providing them with the necessary information to participate in local decision-making and ensuring they are represented. The importance of

5684-536: The census is that it represents the entire statistical universe, down to the smallest geographical units, of a country or region. Planners need this information for all kinds of development work, including: assessing demographic trends; analysing socio-economic conditions; designing evidence-based poverty-reduction strategies; monitoring and evaluating the effectiveness of policies; and tracking progress toward national and internationally agreed development goals." In addition to making policymakers aware of population issues,

5782-443: The census of agriculture , data is collected at the agricultural holding unit. An agricultural holding is an economic unit of agricultural production under single management comprising all livestock kept and all land used wholly or partly for agricultural production purposes, without regard to title, legal form, or size. Single management may be exercised by an individual or household, jointly by two or more individuals or households, by

5880-474: The census of agriculture for development is that it gives a snapshot of the structure of the agricultural sector in a country and, when compared with previous censuses, provides an opportunity to identify trends and structural transformations of the sector, and points towards areas for policy intervention. Census data are used as a benchmark for current statistics and their value is increased when they are employed together with other data sources. Early censuses in

5978-563: The census of agriculture, users need census data to: Although the census provides useful statistical information about a population, the availability of this information could sometimes lead to abuses, political or otherwise, by the linking of individuals' identities to anonymous census data. This is particularly important when individuals' census responses are made available in microdata form, but even aggregate-level data can result in privacy breaches when dealing with small areas and/or rare subpopulations. For instance, when reporting data from

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6076-438: The censuses, the U.S. Census Bureau relied on local people to have some knowledge of residents. Racial classification was made by the census enumerator in these decades, rather than by the individual. The 1890 census was the first to be compiled using the new tabulating machines invented by Herman Hollerith . The net effect of the many changes from the 1880 census (the larger population, the number of data items to be collected,

6174-575: The central government. Differing release strategies of governments have led to an international project ( IPUMS ) to co-ordinate access to microdata and corresponding metadata. Such projects such as SDMX also promote standardising metadata, so that best use can be made of the minimal data available. Censuses in Egypt first appeared in the late Middle Kingdom and developed in the New Kingdom Pharaoh Amasis , according to Herodotus , required every Egyptian to declare annually to

6272-464: The combination of data from registers, surveys and other sources. Censuses have evolved in their use of technology: censuses in 2010 used many new types of computing. In Brazil, handheld devices were used by enumerators to locate residences on the ground. In many countries, census returns could be made via the Internet as well as in paper form. DSE is facilitated by computer matching techniques that can be automated, such as propensity score matching . In

6370-469: The concept of usual residence. Usual residence, a principle established by the Census Act of 1790, is defined as the place a person lives and sleeps most of the time. The Census Bureau uses special procedures to ensure that those without conventional housing are counted. Data from these operations are not as accurate as data obtained from traditional procedures. In instances where the bureau is unsure of

6468-666: The data provides a beginning for the allocation of resources. In addition, collected data are used in aggregate for statistical purposes. Replies are obtained from individuals and establishments only to enable the compilation of such general statistics. The confidentiality of these replies is very important. By law, no one—neither the census takers nor any other Census Bureau employee—is permitted to reveal identifiable information about any person, household, or business. By law ( Pub. L.   95–416 , 92  Stat.   915 , enacted October 5, 1978 ), individual decennial census records are sealed for 72 years. One explanation for this number

6566-565: The decennial census questionnaires are available online from many websites. Computerized aggregate data describing the characteristics of small geographic areas for the entire period from 1790 to 2010 are available from the National Historical Geographic Information System . The bureau recognizes four census regions within the United States and further organizes them into nine divisions. These regions are groupings of states that subdivide

6664-560: The decennial censuses, the Census Bureau issues estimates made using surveys and statistical models, in particular, the Population Estimates Program and American Community Survey . The United States census is distinct from the Census of Agriculture , which is no longer the responsibility of the Census Bureau. It is also distinct from local censuses conducted by some states or local jurisdictions . The U.S. census

6762-548: The federal government's decision to do so. The use of alternative enumeration strategies is increasing but these are not as simple as many people assume and are only used in developed countries. The Netherlands has been most advanced in adopting a census using administrative data . This allows a simulated census to be conducted by linking several different administrative databases at an agreed time. Data can be matched, and an overall enumeration established allowing for discrepancies between different data sources. A validation survey

6860-423: The form of conditional distributions ( histograms ) can be derived interactively from the estimated mixture model without any further access to the original database. As the final product does not contain any protected microdata, the model-based interactive software can be distributed without any confidentiality concerns. Another method is simply to release no data at all, except very large scale data directly to

6958-792: The historical structure of society. Political considerations influence the census in many countries. In Canada in 2010 for example, the government under the leadership of Stephen Harper abolished the mandatory long-form census. This abolition was a response to protests from some Canadians who resented the personal questions. The long-form census was reinstated by the Justin Trudeau government in 2016. As governments assumed responsibility for schooling and welfare, large government research departments made extensive use of census data. Population projections could be made, to help plan for provision in local government and regions. Central government could also use census data to allocate funding. Even in

7056-466: The identification of individuals in marginal populations; others swap variables for similar respondents. Whatever is done to reduce the privacy risk, new improved electronic analysis of data can threaten to reveal sensitive individual information. This is known as statistical disclosure control . Another possibility is to present survey results by means of statistical models in the form of a multivariate distribution mixture. The statistical information in

7154-511: The internet. It is also possible that the hidden nature of an administrative census means that users are not engaged with the importance of contributing their data to official statistics. Alternatively, population estimations may be carried out remotely with geographic information system (GIS) and remote sensing technologies. According to the United Nations Population Fund (UNFPA), "The information generated by

7252-606: The legal protection of confidential census data, which was not restored until 1947. This information facilitated the internment of Japanese-Americans , following the Japanese attack on the U.S. at Pearl Harbor on December 7, 1941, and the internment of Italian- and German-Americans following the United States' entry into World War II . In 1980, four FBI agents went to the Census Bureau's Colorado Springs office with warrants to seize census documents, but were forced to leave with nothing. Courts upheld that no agency, including

7350-524: The mid 20th century, census data was only directly accessible to large government departments. However, computers meant that tabulations could be used directly by university researchers, large businesses and local government offices. They could use the detail of the data to answer new questions and add to local and specialist knowledge. Nowadays, census data are published in a wide variety of formats to be accessible to business, all levels of government, media, students and teachers, charities, and any citizen who

7448-476: The names of the heads of household and a general demographic accounting of the remaining members of the household. Beginning in 1850, all members of the household were named on the census. The first slave schedules were also completed in 1850, with the second (and last) in 1860. Censuses of the late 19th century also included agricultural and industrial schedules to gauge the productivity of the nation's economy. Mortality schedules (taken between 1850 and 1880) captured

7546-403: The number of elected representatives to regions (sometimes controversially – e.g., Utah v. Evans ). In many cases, a carefully chosen random sample can provide more accurate information than attempts to get a population census. A census is often construed as the opposite of a sample as it intends to count everyone in a population, rather than a fraction. However, population censuses do rely on

7644-529: The number of residents at an address after a field visit, its population characteristics are inferred from its nearest similar neighbor (hot-deck imputation ). This practice has effects across many areas, but is seen by some as controversial. The practice was ruled constitutional by the U.S. Supreme Court in Utah v. Evans . Certain American citizens living overseas are specifically excluded from being counted in

7742-558: The official keeper of archived federal census records. Complete online census records can be accessed for no cost from National Archives facilities and many libraries, and a growing portion of the census is freely available from non-commercial online sources. Census microdata for research purposes are available for all censuses from 1790 forward except for 1890 through the Integrated Public Use Microdata Series ( IPUMS ), and scanned copies of each of

7840-497: The one ordered by the second Rashidun caliph , Umar . The Domesday Book was undertaken in AD   1086 by William I of England so that he could properly tax the land he had recently conquered. In 1183, a census was taken of the crusader Kingdom of Jerusalem , to ascertain the number of men and amount of money that could possibly be raised against an invasion by Saladin , sultan of Egypt and Syria . The first national census of France ( L'État des paroisses et des feux )

7938-436: The present been controversial due to its role in reapportioning political representation. In the 1850s, census planners suppressed information about slavery due to pressure from Southern lawmakers. The results of the 1920 census were ignored and no reapportionment took place, as rural lawmakers feared losing power to urban areas. In the 1940s, census officials were involved in organizing Japanese-American internment . The census

8036-428: The problems of overcount and undercount and the coherence of census enumerations with other official sources of data. For instance, during the 2020 U.S. Census, the Census Bureau counted people primarily by collecting answers sent by mail, on the internet, over the phone, or using shared information through proxies. These methods accounted for 95.5 percent of all occupied housing units in the United States. This reflects

8134-577: The public is the 1950 census, released on April 1, 2022. Aggregate census data are released when available. Under the administration of President Franklin D. Roosevelt , the Federal Bureau of Investigation (FBI), using primarily census records, compiled (1939–1941) the Custodial Detention Index ("CDI") on citizens , enemy aliens , and foreign nationals , who might be dangerous. The Second War Powers Act of 1941 repealed

8232-403: The rationale to add the question was arbitrary and capricious and required the department to provide a better reasoning before inclusion. The department dropped the question by the form's publication time. Following the decision, Trump issued an executive order directing the department to obtain citizenship data from other federal agencies rather than via the census. On July 21, 2020, Trump signed

8330-506: The reign of Emperor Chandragupta Maurya under the leadership of Chanakya and Ashoka . The English term is taken directly from the Latin census , from censere ("to estimate"). The census played a crucial role in the administration of the Roman government, as it was used to determine the class a citizen belonged to for both military and tax purposes. Beginning in the middle republic, it

8428-443: The same level of detail but raise concerns about privacy and the possibility of biasing estimates. A census can be contrasted with sampling in which information is obtained only from a subset of a population; typically, main population estimates are updated by such intercensal estimates . Modern census data are commonly used for research, business marketing , and planning, and as a baseline for designing sample surveys by providing

8526-534: The standard of a statistical register by comparing the data from different sources and ensuring the quality is sufficient for official statistics to be produced. A recent innovation is the French instigation of a rolling census program with different regions enumerated each year so that the whole country is completely enumerated every 5 to 10 years. In Europe, in connection with the 2010 census round, many countries adopted alternative census methodologies, often based on

8624-508: The statistics of a smaller one, rather it attempts to account for missing individuals by comparing across populations. Furthermore, the Census Clause of the Constitution was not violated as the actual enumeration needs to be conducted "in such Manner as" Congress itself "shall by Law direct," which wording which does not forbid the use of statistical methods to improve accuracy. This case follow several others that rule on ' sampling ' in

8722-404: The third by Karl Friedrich Wilhelm Dieterici in 1859. In 1931, Walter Willcox published a table in his book, International Migrations: Volume II Interpretations , that estimated the 1929 world population to be roughly 1.8 billion. Utah v. Evans Utah v. Evans , 536 U.S. 452 (2002), was a United States Supreme Court case holding that the use of certain statistical techniques in

8820-419: The totals, claiming that he had the authority to make this determination on a Constitutional and past legal basis. Several legal challenges were filed, and a combined suit from 22 states and several non-governmental organizations were found against Trump, ruling that only Congress has the authority to interpret the manner of which people the census includes. Trump petitioned to the Supreme Court which has certified

8918-576: The use of imputation. North Carolina, which stood to lose a Representative under such an injunction, intervened in the case, disputing Utah's standing to sue. The Utah federal district court refused to grant the State's injunction ruling in favor of the Census Bureau. Appealing the ruling to the Supreme Court, Utah argued that the Bureau's use of imputation violated 13 U.S.C. §195, which prohibits use of ' sampling ' for apportioning Representatives among states. It further argued that imputation did not satisfy

9016-443: Was abandoned, with the contract being sold to Brazil. The online response has some advantages, but one of the functions of the census is to make sure everyone is counted accurately. A system that allowed people to enter their address without verification would be open to abuse. Therefore, households have to be verified on the ground, typically by an enumerator visit or post out . Paper forms are still necessary for those without access to

9114-547: Was again challenged in the courts. While lower courts had ruled for an injunction against the department from implementing the Replan Schedule, the Supreme Court issued a stay of the injunction in October 2020, allowing the census to end early. Around the same time, Trump issued a memo to the Commerce Department on July 21, 2020, instructing them to use estimates of undocumented immigrants and subtract their numbers from

9212-533: Was designed to elicit basic information about the nature of the land and the life of its peoples. The replies, known as " relaciones geográficas ", were written between 1579 and 1585 and were returned to the Cronista Mayor in Spain by the Council of the Indies. The earliest estimate of the world population was made by Giovanni Battista Riccioli in 1661; the next by Johann Peter Süssmilch in 1741, revised in 1762;

9310-405: Was disbelief, as it was widely believed that the "right answer" was at least 75,000,000. This census is also notable for the fact it is one of only three for which the original data are no longer available. Almost all the population schedules were destroyed following a fire in 1921. One purpose of the census is to divide the house seats by population. Furthermore, as with any Census Bureau survey,

9408-421: Was happening and have a basis for planning. The content of the decennial census changed accordingly. In 1810, the first inquiry on manufactures, quantity and value of products occurred; in 1840, inquiries on fisheries were added; and in 1850, the census included inquiries on social issues, such as taxation, churches, pauperism, and crime. The censuses also spread geographically, to new states and territories added to

9506-524: Was undertaken in 1328, mostly for fiscal purposes. It estimated the French population at 16 to 17 million. In the 15th century, the Inca Empire had a unique way to record census information. The Incas did not have any written language but recorded information collected during censuses and other numeric information as well as non-numeric data on quipus , strings from llama or alpaca hair or cotton cords with numeric and other values encoded by knots in

9604-493: Was usually carried out every five years. It provided a register of citizens and their property from which their duties and privileges could be listed. It is said to have been instituted by the Roman king Servius Tullius in the 6th century BC, at which time the number of arms-bearing citizens was supposedly counted at around 80,000. When the Romans conquered Judea in AD   6, the legate Publius Sulpicius Quirinius organized

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