The fecundability of U.S. women

Abstract In this note I shall define fecundability as the probability that a non-pregnant woman will achieve a recognizable pregnancy during a month of exposure to risk.     

The fecundability of U.S. women

In this note I shall define fecundability as the probability that a non-pregnant woman will achieve a recognizable pregnancy during a month of exposure to risk.     

Influence of yard work and weight training on bone mineral density among older U.S. women

The purpose of this study was to determine the influence of type of physical activity on bone mineral density among older U.S. women. Findings from the present study indicate that jogging, swimming and calisthenics were weak predictors for high bone density values. Bicycling, aerobics, walking and dancing were moderate predictors for positive bone density. Yard work and weight training were strong and independent predictors for positive bone density.     

The status of women in the rural U.S.S.R.

Degree of sex equality in rural areas of the U.S.S.R. is assessed with reference to a multi-variable model which specifies demographic, technological, social, and ideological factors associated with sex stratification. Such analysis reveals that the emphasis in the U.S.S.R. on women's participation in production as the key to sex equality ignores other dimensions of sex stratification which are not changed using this tactic. In particular, rural traditions of higher birth rates, more authoritarian families, greater religious emphasis, and male scorn for women have kept the status of rural women even lower than that of their urban counterparts. Additionally, the agrarian techno-economic base and lack of institutional supports for childcare and housework help perpetuate sex stratification. Increasing sex differentiation is probably in store for the Soviet Union, because official pronatalist policies are likely to be facilitated by expanding the service sector, which will further increase the division of labor in the market.     

Diverging fertility among U.S. women who delay childbearing past age 30

In this paper I examine the evolving association between educational attainment and the timing of births. In the late 1970s, women with four-year college degrees had lower first birth rates before age 30 than women with less education, but rates of first births were similar for the two groups after age 30. From the 1970s to the 1990s, first birth rates decreased before age 30 for all women, but increased after age 30 only for women with four-year college degrees. Parity 2 birth rates also increased for college graduates with a first birth after age 30. These results document widening educational differences in fertility timing between 1975 and 1995, which may reflect period changes at later ages in women's work and family lives.     

Playing Cat and Mouse at the U.S.-Mexican Border

Border control and apprehension activity represents a major element of the Immigration Reform and Control Act of 1986. Does apprehending an undocumented migrant deter remigration? If it does not, does it change future migration behavior? I explore these questions by testing hypotheses about the effects of apprehension on the actual and desired length of stay in the United States and on the frequency of migration for undocumented Mexican male migrants. Results suggest that INS policy may well be backfiring. Migrants stay in the United States longer on non-apprehended trips and stay in Mexico for shorter spells between trips to compensate for the cost of a past apprehension.     

Underreporting of abortion in surveys of U.S. women: 1976 to 1988

Although research on reproductive behavior depends heavily on information from surveys, abortions are characteristically underreported in such data. Estimates of the level of reporting are made for each of the recent major surveys of U.S. women: the 1976, 1982, and 1988 cycles of the National Survey of Family Growth, the 1976 and 1979 National Surveys of Young Women, and the National Longitudinal Surveys of Work Experience of Youth. The estimates are based on comparisons with external counts of abortions taking place. We examine variation by characteristics of women, trends over time, and the possible effects of length of recall and of the way in which questions about abortion are asked. Abortion reporting is found to be highly deficient in all the surveys, although the level varies widely. Whites are more likely to report their abortions than nonwhites. Special, confidential questioning procedures hold promise for improving the results.     

Fertility of U.S. farm women during the electrification era, 1930–1950

The research reported here examines the fertility of U.S. farm women during the period in which rural America became electrified. It suggests that electrification was relatedly indirectly to fertility through the impact it had on farm and home production modes, and also through its facilitation of more general socioeconomic change. The model is tested using Census and Agricultural Census data for 473 rural farm counties at three points in time — 1930, 1940, and 1950. Overall, the results of multivariate analyses generally support the conceptual model. The effects of farm production/technology factors, electrification, and sociodemographic characteristics are evaluated using OLS. The effects of electrification net of the other variables are significant when subsamples of Southern and non-Southern counties are examined separately, with electrification related to lower fertility in Southern counties and higher fertility in non-Southern counties. The findings emphasize the importance of considering potential demographic impacts when introducting rural development projects in developing countries.     

How surveys are changing at the U.S. Bureau of the Census

"This article describes the survey activities of the U.S. Census Bureau and recent efforts by the bureau to move toward a more fully automated environment....[It] focuses on four areas in which the Census Bureau is changing its approach to surveys: (1) redesigning the questionnaire for the Current Population Survey to better reflect current labor force conditions; (2) redesigning the same questionnaire to gain advantages from computer-assisted interviewing; (3) redesigning the samples for household surveys to be used during the next decade, a task undertaken after every decennial census; and (4) progress in changing to a computer-assisted survey information collection (CASIC) system and developing a data management network for all Census Bureau surveys."     

The age pattern of first-birth rates among U.S. women: The bimodal 1990s

Between 1990 and 2002, the age pattern of Type I first-birth rates (i.e., the hazard of a first birth) among U.S. women was bimodal. This pattern, driven by changing differential fertility patterns among racial and ethnic groups, reached its apex at the mid-1990s and had almost vanished by the decade's end. Research on first-birth timing has tended to focus on Type II first-birth rates and therefore has failed to identify this larger, bimodal pattern. This article presents the benefits of using Type I rates, documents the emergence of the bimodal pattern via two new measures of bimodality, and uses a decomposition analysis to discuss the pattern's causes.     

Correlates of divorce in the U.S.S.R.

The theoretical rationale of this study is that conditions associated with divorce reside outside the family within a broader social system where the family finds itself located. The absence of major differences in divorce law from one place to another within the Soviet Union makes it possible to explore this hypothesis by examining areal differentials in divorce rates. Crude divorce rates and crude marriage rates for 1960 have been published in Vestnik Statistiki for 109 political-administrative areas in the Soviet Union. Several indicators of modernization are available for the same areas from the 1959 U.S.S.R. Census of Population. About 80 per cent of the variation among areas with respect to the crude divorce rate is accounted for by six variables: the crude marriage rate, the percentage of urban population, and the employee-worker ratio in the labor force, each of which is positively associated with the divorce rate; and the proportion of poorly educated women, the ratio of children to adult males, and the mean household-family size, each of which is negatively associated with the divorce rate.     

Toward a U.S. population policy

The gratifying media results from a concerted national and local publicity effort when Zero Population Growth (ZPG) released its recommendations for a national population policy are reported. Support was received from 10 members of Congress and local leaders. 8 ZPG chapters and the Washington office held press conferences casting the meaning of increased population growth in regional terms. In Cincinnati, ZPG focused on the shortage of landfill space, in San Francisco the water shortage, and in Massachusetts the rapid urbanization of prime farmland. The Congressmen emphasized that the U.S. must have a comprehensive population policy before it can tell other countries they must. Among the ZPG policies recommended are: zero population growth by 2008, increased funding for family planning services and education, special programs for teenagers, greater public education on population dynamics, increased funding for contraceptive research, enforcement of existing immigration laws, comprehensive review of immigration policy, equal rights for women, and more equitable income tax policy.     

Future warming for U.S. cities

In this study, a model is developed to predict future warming for metropolitan areas in the United Sates to the year 2035. According to model results, most U.S. cities of 200,000 population or more can expect significant local warming. The average predicted warming for 104 cities analyzed is .34 degrees Farenheit. The greatest warming can be expected in sunbelt cities experiencing rapid population growth. Such localized warming is in addition to any heating which might occur from an enhanced greenhouse effect. Most cities can expect changes in energy demand, human health, and water supply.The author wishes to thank Stuart Simpson of the George Washington University's Center for Administrative and Academic Computing for his generous support and cooperation.     

Multi-Dimensional Deprivation in the U.S.

This paper presents a comprehensive analysis of multidimensional deprivation in the U.S. since the Great Recession, from 2008 to 2013. We estimate a Multidimensional Deprivation Index by compiling individual level data on several well-being dimensions from the American Community Survey. Our results indicate that the proportion of the population that is multidimensional deprived averages about 15 percent, which exceeds the prevalence of official income poverty. Lack of education, severe housing burden and lack of health insurance were some of the dimensions in which Americans were most deprived in. Though deprivation increased during the recession, it trended towards a decline between 2010 and 2013. Unlike the official and the supplemental poverty measure which did not show any decline, the deprivation index better reflects the economic recovery since the recession. Overall, the prevalence of deprivation was higher in the southern and the western states and among the Asian and the Hispanic population. Importantly, there was not much overlap between individuals who were income poor and those who were multidimensional deprived. In fact, almost 30 % of individuals with incomes slightly above the poverty threshold experienced multiple deprivations. Our analysis underscores the need to look beyond income based poverty statistics in order to fully realize the impact of the recession on individuals’ well-being.     

The developing program on social indicators at the U.S. Bureau of the Census

The Bureau of the Census Fiscal Year 1978 Budget provides funds for the first time for beginning a modest but coordinated effort in the field of social indicators and associated activities. The Bureau, buttressed by the advice and participation of other Government agencies, organizations and individuals outside of the Federal establishment long interested in social indicators, intends to:

1. consolidate and extend the development of the concepts and principles advanced previously relating to social indicators;
2. continue and expand the efforts and communication network established at the Office of Management and Budget, in connection with the preparation of the Social Indicators 1973 and 1976 reports;
3. systematically identify and assemble information sets and bits that are contained in censuses and surveys, household and establishment universes, administrative records, studies and projects capable of contributing to social indicator and social accounting development;
4. establish the basic analytic framework and an orderly set of detailed interrelated social accounts capable of being aggregated or disaggregated to appropriate levels of abstraction; and
5. prepare research and analytic studies and make available information generated from the social indicator and social accounting efforts at the Bureau, subject to limitations associated with confidentiality and copyright provisions pertaining to private sources of information.

The organizational structure to carry out this program consists of four primary work centers: information, social indicators, social accounts, and special studies. The structure is designed to provide for continuity of purpose, improve chances for individual achievement and group benefit, and to generate products that will contribute to a more accurate understanding of life experiences in the context of the interplay of social and economic forces and political and juridical institutions.     

Older women on the U.S.-Mexico border: exploring the health of Hispanics and non-Hispanics Whites

Research on ethnicity and socioeconomic status (SES) suggests that Hispanics are more likely than non-Hispanic Whites to experience poverty and low levels of education, which may relate to poorer health status. This study used a health survey to examine income, education, ethnicity, birthplace, and age on self-reported health factors of women age 60 and older on the U.S.-Mexico border. Results show that income, age, and education were significantly associated with several health factors (Physical Health, Emotional Health, General Health, Energy Level, and Activity Potential). Older women with lower SES, regardless of ethnicity, reported poorer health than younger-old women with higher SES.     

Environmental Quality in the U.S. States

This analysis of data on environmental quality differentials in the U.S. states shows, first, that the many physical measures of the environment in the U. S. states form two coherent factors: pollution (which became the criterion variable for the study) and waste management. Likewise, budget allocations for the environment reduce to 'contemporary' and 'traditional' expenditures. The former type, along with per capita miles driven and the proportion of the population in metropolitan centers, were used as control variables in tests of three explanatory models: 'industrial capitalism', 'sectoral political economy' and 'sociological structuralism.' No one of these explanations was completely supported by the regression analyses. Therefore, a factor analysis of 16 measures of structure and environmental policy characteristics was run that generated three types of state structure: industrial, high-change and commercial. The first and third types proved to be strong predictors, positive and negative respectively, of pollution level. The major implication of these findings is that social structure, policy and pollution levels are inextricably intertwined.     

Alternative Projections of the U.S. population

The U.S. Bureau of the Census recently released a set of population projections that include middle and high projections that we argue are too conservative. The projections discount the possibility of future baby booms and assume slow rates of mortality decline and low levels of immigration. In this article we explore the impact on the size and age composition of the U.S. population of alternative scenarios of plausible fertility, mortality, and immigration assumptions. We conclude that (1) the Census Bureau's highest projection might be interpreted as a reasonable middle projection, (2) a reasonable high projection would yield a U.S. population in 2080 some 300 million persons larger than the Bureau's highest projection, with the population 85 and older more than twice the Bureau's greatest estimate, and (3) uncertainty about the pace of population growth is substantially greater than the Bureau's projections suggest.     

U.S. births and limit cycle Models

Lee's (1974) formal demographic feedback models summarize the implications for births and age-structure of neo-Malthusian theories of baby booms such as those of Easterlin. For some parameter values, such models imply sustained cycles, so-called "limit cycles", in births. Frauenthal and Swick recently reestimated a continuous-age version of Lee's basic cohort model with U.S. series and, contrary to Lee's original findings, concluded that "limit cycles oscillations have been occurring in U.S. births." This article disputes their conclusion, ascribing it to an inconsistency in detrending procedures. Furthermore, it corrects Lee's original conclusion by showing that his alternative period labor-force feedback model, estimated from U.S. series, leads to cycles of implausibly long period. This article thus reopens the question of whether any feedback model could account for the observed cycles in U.S. births.     

Religious involvement and U.S. adult mortality

We use recently released, nationally representative data from the National Health Interview Survey-Multiple Cause of Death linked file to model the association of religious attendance and sociodemographic, health, and behavioral correlates with overall and cause-specific mortality. Religious attendance is associated with U.S. adult mortality in a graded fashion: People who never attend exhibit 1.87 times the risk of death in the follow-up period compared with people who attend more than once a week. This translates into a seven-year difference in life expectancy at age 20 between those who never attend and those who attend more than once a week. Health selectivity is responsible for a portion of the religious attendance effect: People who do not attend church or religious services are also more likely to be unhealthy and, consequently, to die. However, religious attendance also works through increased social ties and behavioral factors to decrease the risks of death. And although the magnitude of the association between religious attendance and mortality varies by cause of death, the direction of the association is consistent across causes.