Estimates of coverage of the population by sex,race, and age in the 1970 census

Several estimates of total net underenumeration and of net census errors by sex, race (white, Negro-and-other-races, Negro), and age (five-year groups) in the 1960 and 1970 Censuses, for the total population of the United States, derived by the methods of demographic analysis, are presented. The different data, procedures, and assumptions employed in developing the various estimates are described briefly, and the findings are then discussed in terms of a”preferred” set of estimates. The preferred set of estimates of corrected population for 1970 combines estimates for persons under age 35 based directly on birth, death, and migration statistics, estimates for females aged 35 to 64 based on the Coale-Zelnik estimates (white) for 1950 or the Coale-Rives estimates (Negro) for 1960, estimates for males aged 35 to 64 based on the use of expected sex ratios, and estimates for the population 65 and over based on”Medicare” enrollments and expected sex ratios. These estimates indicate an overall net underenumeration of 5.3 million persons or 2.5 percent in 1970, as compared with 5.1 million or 2.7 percent in 1960, and a net underenumeration of 1.9 percent for whites and of 7.7 percent for Negroes in 1970, as compared with 2.0 percent and 8.0 percent, respectively, in 1960. As in 1960, undercoverage in 1970 was greatest for Negro males (9.9 percent); net error rates exceeded 12 percent in each age group 20 to 49 and reached 17 to 19 percent at ages 25 to 44. All sex-race groups showed marked increases between 1960 and 1970 for children under ten and marked declines at ages ten to 24. Equally reliable estimates of population coverage cannot be prepared for states and smaller geographic units or for the population of Spanish ancestry.     

Foreign-Born Emigration From The United States: 1960 To 1970

This paper presents estimates of emigration of foreign-born persons by age and sex for 1960 to 1970, based on 1960 and 1970 census counts of the foreign-born population, adjusted life table survival rates, and annual statistics on alien immigration published by the Immigration and Naturalization Service. The effects of nativity bias are discussed. It is estimated that approximately 1,140,000 foreign-born persons emigrated between 1960 and 1970, of which 663,000, or 58 percent, were women and 477,000 were men. Almost one-quarter of the foreign-born emigrants were women 25–44 years of age in 1970. About 175,000 foreign-born persons 65 years and over in 1970 emigrated during the decade. The most significant finding, that more than one million foreign-born persons left the United States between 1960 and 1970, has important implications for U.S. immigration policy and for net immigration data used to estimate the population of the United States.     

Estimation of demographic measures for India, 1881-1961, based on census age distributions

Abstract India is one of the very few developing countries which have a relatively long history of population censuses. The first census was taken in 1872, the second in 1881 and since then there has been a census every ten years, the latest in 1971. Yet the registration of births and deaths in India, even at the present time, is too inadequate to be of much help in estimating fertility and mortality conditions in the country. From time to time Indian census actuaries have indirectly constructed life tables by comparing one census age distribution with the preceding one. Official life tables are available for all the decades from 1872-1881 to 1951-1961, except for 1911-1921 and 1931-1941. Kingsley Davis(1) filled in the gap by constructing life tables for the latter two decades. He also estimated the birth and death rates ofIndia for the decades from 1881-1891 to 1931-1941. Estimates of these rates for the following two decades, 1941-1951 and 1951-1961, were made by Indian census actuaries. The birth rates of Davis and the Indian actuaries were obtained basically by the reverse survival method from the age distribution and the computed life table of the population. Coale and Hoover(2), however, estimated the birth and death rates and the life table of the Indian population in 1951 by applying stable population theory. The most recent estimates of the birth rate and death rate for 1963-1964 are based on the results of the National Sample Survey. All these estimates are presented in summary form in Table 1.     

Constructing fertility tables for Soviet populations

Because the 1970 Soviet Union census does not provide information on the age structure of men and women separately by sex and according to their ethnic affiliation, the 1959 USSR census data serve as the basis to infer knowledge about ethnic fertility. The model takes into account (1) the total number of births in 1960, estimated from the child-woman ratio in 1959, (2) the age structure of women in 1959, and (3) the assumed pattern of age-specific birth rates structured in terms of the modal age at childbearing and the length of the fertility age span. The results show that Ukrainians among the Slav populations ranked as the lowest with 2.07 children born per woman. Their total fertility contrasts with that of Kazakhs native to Central Asia, who reportedly according to Soviet sources had 7.46 children per woman in 1958-1959, and whose estimated rate is around 8.59 children. Extreme variations appear in the estimates of fertility among nationalities of the Caucasus region, Volga Basin, and to a lesser degree in Siberia. Official Soviet calculations of crude birth rates and age-specific rates for 15 Union Republics in 1967-1968 are transcribed and compared with the estimates for nationalities in 1959-1960. The same theoretical model used to generate the Soviet rates may be adapted under different assumptions to non-Soviet populations in other situations where the data are scanty or incomplete.     

Regional trends in fertility and mortality in Brazil

Abstract Questions asked in the 1970 Brazilian census allow the application of fertility and childhood mortality techniques developed by W. Brass. Using some propositions based on fertility estimates from the 1970 census data it was possible to extend the analysis to the 1940, 1950 and 1960 censuses. Estimates are also provided for ten Brazilian regions, for 1940, 1950 and 1970. These estimates show a slight decrease in the fertility level for the country as a whole, but two different trends at regional levels. Between 1940-50 and 1960-70 the poorer regions experienced constant or increasing fertility levels while developed regions experienced declining ones, with only one exception. The mortality estimates indicate a consistent decline in the mortality level of all regions, but also a divergent trend between poor and developed regions, in life expectancies at birth. This work is a summarized version of Chapters II, III and IV of my Ph.D. thesis written under the supervision of Professor D. V. Glass and Mr J. Hobcraft at the University of London. I am most grateful to my supervisors as well as to Professor W. Brass for valuable comments on several aspects of the thesis. While carrying out this study, the author was supported by grants from the Federal University of Minas Gerais, Brazil, and the Ford Foundation.     

Coverage of the population in Census 2000: Results from Demographic Analysis

Since the 1960 Census, Demographic Analysis (DA) has been used by the Census Bureau to evaluate the coverage of the population. Administrative statistics on births, deaths, immigration and Medicare enrollments as well as estimates of legal emigration and net undocumented immigration are used to produce demographic analysis estimates of the population for the census date. These estimates are compared to the Census 2000 data to evaluate coverage in the census. The results are also compared to measures of undercount obtained from dual system estimation. The DA measures substantial reduction in net undercount in Census 2000 compared to 1990. The reductions occur among all demographic categories: all broad age groups, males and females, Blacks and Non-Blacks.     

Effects of migration on the educational levels of the black resident population at the origin and destination, 1955–1960 and 1965–1970

Using the 1960 and 1970 census data, this paper analyzes the net effects of the interregional migration of black males on the educational levels of the resident black male population at the regions of origin and destination. Significant variations are observed in the educational selectivity of out-migrants from each region, by region of destination. Comparing the educational levels of the return migrants to the South with those of the resident population in the nonsouthern regions provides no evidence that the return migrants are "failed" migrants. The net effect of interregional migration on the educational levels of the black male resident population at the regions of origin and destination is insignificant in most age groups, for both the 1955--1960 and 1965--1970 periods. In particular, in-migration from the South to nonsouthern regions has little effect on the educational levels of the resident population in most age groups. In fact, for nonsouthern regions, out-migration is more detrimental to the educational level of the resident black male population than is in-migration from the South. Furthermore, the net effect of interregional migration has declined from the 1955--1960 period to the 1965--1970 period.     

Characteristics of age composition of China's population]

The age composition of Chinese population is analyzed via data collected in the 1982 census, which has been the basis for planning the social and economic life of 1 billion people. The census reflected complete population age composition, by birth, mortality and growth rates, from the time of the Liberation in 1949. The 10% sample, based on the national age composition, did not include the 4,240,000 people in military service which, as .42% of the total population, did not constitute a large differential. The population has grown rapidly since 1949. A few years before and after 1960, growth was reduced due to economic conditions, but the overall growth trend remained unchanged. The census showed that since 1970, growth has experienced a downturn, but the decrease was not related to the sudden drop before and after 1960. The census also showed China's population had changed from 1964's primarily young population to an adult population, but the process of population aging is only beginning, with a still relatively young population. China's population is not a stable one. This increase and decrease were greatly influenced by the changes in social and economic conditions. The disparity in age composition caused by these changes has created problems in social life, education, employment, marriage, housing, health, transportation, and cultural facilities. There are large differences in age composition between regions and ethnic groups. The decreases in birth and growth rate of the eastern coastal provinces were more rapid than those of the southwest and northwest regions. The age composition of minority nationalities is considerably younger than the Han people. Factors that influenced age composition characteristics included reduction of the neonatal mortality rate, the rises and falls of economic development, and the work in planned fertility.     

A tentative discussion on population reproduction in U.S.A. after World War II]

Immigration is an important factor in America's population growth. In the last 200 years over 50 million persons immigrated to the U.S.; 99.6% of the current total population are descendents of those immigrants. In the 1930s, American population decreased by about 7.2/1000, but during the 1950s the annual rate of natural increase rose to 18.5/1000. In the 1960s, this rate began to decrease until the 1970s when it was about 9/1000. By 1981 and 1982, the rate of natural increase declined to 7/1000. These changes are due to the relatively slow decline in the mortality rate of the last 30 years (10.6/1000 in 1945 to 9/1000 in 1981) and to the fluctuations in birth rates (from 19.5/1000 in 1945 to a high of 25.3/1000 in 1957 and back to 16/1000 in 1981). Birth rates are influenced by factors such as the number of fertile women, age structure, fecundity, marriage, family, occupation, and education. In 1950 there were 38,920,000 women aged 15-49, and by 1980 there were 57,630,000. Of these, in 1950, 31.28% were aged 20-29, the most fertile period for women, as compared with 35.04% in 1980. Thus, in postwar America, the changes in birth rate did not follow changes in the number of fertile women. Marriage patterns also underwent changes, particularly in the last 20 years. From 1930 to 1935, the marriage rate was 8.6/1000. By 1945, it rose to 16.4/1000. But during the 1960s, an increasing number of women aged 20-29 years remained unmarried. At the end of the 1970s, there was also an increase in the number of married women who did not have children. Furthermore, the number of divorces increased, an additional reason for a declining birth rate. Changes in family structure also influenced postwar American reproduction. In the last two decades, the traditional family has almost disappeared and the nuclear fammily is on the decline. By 1970 there were more people living alone, single parent families, and unrelated people sharing a domicile, than there were family units. Also, educated women who worked often married at a later age, thus placing restrictions on the birth rate.     

Changes in racial identification and the educational attainment of American Indians, 1970–1990

We use data from the 1970, 1980, and 1990 census public-use files to assess the impact of newly identified Indians on the educational attainment of American Indians who were at least 25 years old in 1970. We test the hypotheses that this impact was limited to metropolitan areas and to states with small Indian populations. We find that educational attainment for American Indians rose sharply between 1970 and 1990 and that changes in racial identification were an important component of this increase in 1980 but not in 1990. Increases in educational attainment were concentrated in metropolitan areas and occurred in states with large and small Indian populations.     

The growing American Indian population, 1960–1990: Beyond demography

Since 1960, the Native American population has exhibited explosive growth, increasing from 552,000 to 1,959,000, or 255 percent. The average annual growth rate of 4.3 percent, extending over a 30-year period, is demographically impossible without immigration – in fact, of the 1.4 million growth only 762,000 comes from natural increase, whereas 645,000 comes from non-demographic factors. This paper expands on previous work to illustrate with demographic techniques how such extraordinary growth was achieved through changing patterns of racial self-identification on the part of people with only partial or distant American Indian ancestry, coupled with relatively high fertility and improving mortality. It also provides some basic demographic background on the size, growth, and geographic structure of the American Indian population, while exploring both demographic and geographic underpinnings of the changing population. Data on race from the 1970, 1980, and 1990 Censuses are based on self-identification. A person choosing the American Indian racial response does not have to provide any substantiation or documentation. While this method aids overall census taking by permitting respondents to fill out their own census forms, self-identification adds a temporal component to the data because responses elicited from the same individual (or group of individuals) may change over time in reaction to social, political, or economic conditions or variations in question wording. New identities may emerge or old ones may disappear. This effect has had a noteworthy impact on data for American Indians. Analysts and other data users must be aware of underlying response patterns to interpret changes correctly.     

Estimation of interprovincial migration for Canada from place of birth by residence data, 1951–1961

In Canada, unlike many other countries, birth-residence data by age and sex are available in each of the decennial censuses from 1931 to 1961 which permit the estimation of intercensal net migration for the provinces and regions. After a brief discussion of the basic measures of migration from birth-residence data the paper focusses on the problems and procedures in estimating interprovincial net migration, 1951–1961 for Canada using “the place of birth survival ratio method, ” and it evaluates the estimates thus obtained. The evaluation of the estimates, taking into consideration the inherent limitations of the method and its merits compared with period migration estimates by the census survival ratio method and life table survival ratio method, suggests that the net migration estimates for the Canadian born by the place of birth survival ratio method are probably more reliable than those by the other two methods. One striking finding was that the net migration curves by age obtained from the census survival ratio and place of birth survival ratio estimates were smoother than the curve obtained with the use of the more accurate life table survival ratios. Furthermore, whatever the relative accuracy of net migration may be, the birth-residence approach is capable of furnishing more details about the net migration of the native born than by the standard survival-ratio methods. For the population under age 10 intercensal estimates were directly derived from the place of birth and residence distributions by age.     

The Vital Statistics Method of Estimating Net Migration By Age Cohorts

The focus of this paper is the development and testing of a method of estimating deaths which occur during a decade to aging birth and death cohorts, so that it may be possible to estimate net migration by the vital statistics (VS) method for age cohorts. Until now the VS method has been used only in making estimates of total net migration.The results obtained by using the VS method for age cohorts show that (1) the average census survival rate (CSR) method generally yields algebraically lower estimates of net migration than does the VS method; but (2) there are some striking exceptions which are apparently associated with errors in census enumeration by age, sex, and color. Comparisons between the average CSR and the VS methods are shown, by age, for both the North Carolina and the coterminous United States populations.A cursory examination of these comparisons suggests that the exclusive use of the VS method in estimating net migration for age cohorts may lead to substantial error. Finally, the magnitude of these errors in estimating net migration, as well as in census enumeration, can be roughly approximated if it is assumed that the use of the CSR method yields reasonably accurate estimates of net migration.     

Annual fertility rates from census data on own children: Comparisons with vital statistics data for the United States

This paper begins by describing the procedure and data requirements for calculating annual fertility rates from census data on own children. Then, using data from the United States Censuses of 1960 and 1970, fully adjusted estimates are presented and compared with recorded vital statistics rates. Total fertility estimates derived from own children data for whites average less than two percent lower than the recorded rates- a difference that can be attributed partially to the fact that the estimates are adjusted for net census undercount but the recorded rates are not. Even without adjustments for mortality, children not living with their mothers, and net census undercount, the own children data estimates accurately replicate recorded trends (even though the levels are misspecified). The utility of own children data for the study of differential fertility is discussed.     

Comparing the U.S. Decennial Census Coverage Estimates for Children from Demographic Analysis and Coverage Measurement Surveys

Following every U.S. decennial census since 1960, the U.S. Census Bureau has evaluated the completeness of coverage using two different methods. Demographic analysis (DA) compares the census counts to a set of independent population estimates to infer coverage differences by age, sex, and race. The survey-based approach (also called dual system estimation or DSE) provides coverage estimates based on matching data from a post-enumeration survey to census records. This paper reviews the fundamentals of the two methodological approaches and then initially examines the results of these two methods for the 2010 decennial census in terms of consistency and inconsistency for age groups. The authors find that the two methods produce relatively consistent results for all age groups, except for young children. Consequently, the paper focuses on the results for children. Results of the 1990, 2000, and 2010 decennial censuses are shown for the overall population in this age group and by demographic detail (age, race, and Hispanic origin). Among children, the DA and DSE results are most inconsistent for the population aged 0–4 and most consistent for ages 10–17. Results also show that DA and DSE are more consistent for Black than non-Black populations. The authors discuss possible explanations for the differences in the two methods for young children and conclude that the DSE approach may underestimate the net undercount of young children due to correlation bias.     

Estimation of vital rates for Ghana

Abstract A complete and efficient registration system, of the type which would provide good data on births and deaths, does not exist in Ghana. However, registration of vital events is supposed to be compulsory in 39 towns in the country but the data collected in these areas are too inadequate and defective to provide a sound basis for the analysis of the dynamics of population growth. The results of the censuses conducted by the colonial governments are so defective and unreliable that they do not allow scientific research in the field of population analysis. Before 1960, therefore, when the national census and the post-enumeration survey (based on a 5% sample of the population) were carried out, estimates of fertility and mortality levels were little more than guesses. In this study an attempt has been made to utilize the information on the age-sex composition provided by the 1960 census and post-enumeration survey data on births and deaths to determine, as far as possible, the levels of fertility and mortality and the rates of population growth in Ghana. The fertility estimates-i.e. a crude birth rate of 50, total fertility rate of 6.9 and a gross reproduction rate of 3.4-show that Ghana's fertility is one of the highest in the world. An expectation of life at birth of 40 years, an infant mortality of 160 and a crude death rate of 23 appear to be the most plausible estimates. These estimates yield a rate of natural increase of 2.7% and a growth rate of 3.0% per annum.     

Estimates of vital rates for the Canadian Indians, 1960–1970

The present paper is an attempt to evaluate the registered data on Canadian Indians collected by the Department of Indian Affairs and Northern Development and to prepare vital rates for 1960–1970 using the adjusted data. A cursory examination of registered data for the purpose of developing various demographic indices and for making future estimates of population indicates certain anomalies that call for a careful appraisal of the data. The main problem is the inconsistency in the reporting of births, due largely to the late registration of births. One plausible reason for late registration may be the increased outward movement of Indians from their reserves. Indirect methods are used to adjust the number of births and infant deaths reported annually since 1960. On the basis of the adjusted data, vital rates for the Canadian Indians are calculated for the period 1960–1970. The crude death rate decreased from 10.9 in 1960 to 7.5 in 1970. The infant mortality rate registered a drastic decline, from 81.5 deaths per 1,000 births in 1960 to 34.9 in 1970. During this same time period the birth rate also declined, from 46.5 to 37.2.     

The growth of families headed by women: 1950–1980

In recent decades, the number of families headed by women has increased dramatically. In this article, we use U.S. census data from 1950 to 1980 to consider the extent to which population growth, fertility change, decreased marriage, increased divorce, and increased household headship have contributed to the growth of female-headed families. For white women, the major source of growth during the 1960s and 1970s was an increase in the number of formerly married mothers due to increased divorce and decreased remarriage. There is a similar pattern for black women for the 1960-1970 period. During the 1970-1980 decade, however, the major source of growth for black women was an increase in the number of never-married mothers due to decreased marriage and increased fertility among nonmarried women.     

Migration between India and Pakistan, 1951–61

A critical evaluation of the available data on migration between India and Pakistan in the 1951-61 decade leads to the conclusion that there was a substantial net migration of Pakistan-born persons into India, but only a negligible net migration of India-born persons into Pakistan. Annual administrative statistics published by the Indian Government suggest an immigration from Pakistan of the order of 1.16 to 1.32 million. More importantly, birthplace data from the Indian censuses indicate a net intercensal immigration of Pakistan-born persons amounting to 1.19 to 1.34 million, depending on the assumed level of mortality. The Pakistani census data on the India-born show no net influx from India during 1951-61. Intercensal growth rates for the populations of different religious faiths in Pakistan are consistent with the estimates of net immigration into India. The migrants and the survivors of their progeny are estimated to represent a net gain of about 1.68 million by India and to account for no more than 2.2 per cent of the total population growth in India during 1951-61.     

Estimating the regional migration patterns of the foreign-born population in the United States: 1950-1990

"In this paper, we apply model schedules to graduate data on the internal and external regional [U.S.] migration patterns of the foreign-born population for the 1950-1990 period.... To find estimates of the unrecorded migration flows in-between for four census-defined periods in our study (that is, for 1950-1955, 1960-1965, 1970-1975, and 1980-1985) we interpolate between the data of adjacent census time periods. Finally, we combine the estimated migration data with the corresponding mortality data to calculate and analyze the multiregional life tables and projections associated with each five-year time interval." (EXCERPT)