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Biomedical subjects

D L Poston

Publications and source records attributed to D L Poston.

31 records · Page 2Linked to original sources
PubMed1978

Indigenous labor supply, sustenance organization, and population redistribution in nonmetropolitan America: an extension of the ecological theory of migration.

The ecological theory of migration asserts that change in sustenance organization, to the extent that it produces changes in the opportunities for living, necessitates a change in population size. Migration may thus be viewed as a demographic response to the populations's need to reestablish a balance between its size and sustenance organization, thus attaining its best possible living standard. However, the levels of net in- or out-migration needed to restore the balance should be affected by the degree of positive or negative growth of the indigenous labor force population. We thus test the hypothesis that changes in opportunities for living will be balanced by net changes in the number of persons in the labor force, where this is a function of both indigenous labor supply and net migration.

Ecology↗
PubMed1975

Socioeconomic status, value orientations, and fertility behavior in India.

This paper examines the role assumed by value orientations in the explanation of fertility behavior. Specifically the concern is with the extent to which value orientations intervene between, or mediate, the relationship between socioeconomic status and fertility behavior. The relationships between socioeconomic status, four types of value orientations and three aspects of fertility behavior are examined among males in India. In most instances value orientations provide neither the sole nor the partial interpretations of the relationship between socioeconomic status and fertility. The results of this investigation suggest once again the inadequacy of value orientations as predictors of fertility behavior.

Adult↗
PubMedDate not supplied

Propensity of white women in the United States to adopt children.

Demographically, adoption is a relatively rare event. In 1982, only 2.3 per cent (or about 650,000) of ever-married white women aged 15 to 44 had adopted one or more children. Adoption is an important and very relevant means of family formation for many women, particularly those for whom biological childbearing is difficult or impossible. Although there is a modest literature on adoption behavior, we have very little information about women who have shown a propensity to adopt children. How should the phenomenon of adoption propensity be conceptualized? How many women are there in the United States with such a propensity? How different is this number from the number of women who eventually adopt children? What are the characteristics of women with a propensity to adopt? The objectives of this paper are (1) to estimate the numbers of U.S. women at three different points in time (1973, 1976, and 1982) who have a propensity to adopt, according to various socioeconomic and demographic characteristics; and (2) to compare via log-linear analysis the major characteristics of these women with women who have not shown such a propensity.

Adolescent↗
PubMedDate not supplied

Teenage sexual attitudes in China.

Not much is known about the sexual attitudes of Chinese teenagers. In this article we endeavor to address this void by examining the sexual attitudes of Chinese teenagers with survey data collected in Sichuan Province in 1988. Our analysis has two goals: first, to describe aggregate attitudes toward premarital sexual practices; and second, to identify the principal factors that influence these attitudes. To accomplish the second goal we estimate several regression equations with predictor variables known to influence teen sexual attitudes. Our analysis reveals major differences and similarities between China and the United States and indicates that China's teenagers are somewhat strongly opposed to teen sexual contact, but seem to be more understanding of others who so engage, despite strike laws and public morality forbidding it.

Adolescent↗
PubMedDate not supplied

Son preference and the sex ratio at birth in China: a provincial level analysis.

In this paper we use data from the 1 Per Cent Sample of the 1990 Census of China to calculate sex ratios for the Chinese provinces that are specific not only to parity, but also to the sex composition of previously-born children. We analyze the degree of relationship among and between the SRB's and then consider the phenomenon of son preference. We find the variation in sex ratios at birth among the Chinese provinces is related in an important way to variation among the provinces in the degree of son preference. Our analysis shows abnormally high SRB's in most of the provinces of China, especially at parities 2 and higher when the prior births were daughters. Other societies, namely Taiwan and South Korea, with rapid fertility decline and strong son preference also manifest abnormally high SRB's at parities beyond the first.

China↗
PubMedDate not supplied

Patterns of contraceptive use in China.

This article uses demographic and contraceptive use data from China's 1982 census, 1982 national fertility survey, and National Family Planning Commission to examine the country's patterns of reproductive and contraceptive behavior. Although China's fertility is near replacement level, it varies considerably among the country's subregions. One-half of all 15-49-year-old married fecund women who practice contraception are using intrauterine devices (IUDs); this means that about 70 percent of the world's IUD users are in China. Although China and the United States have similar overall contraceptive use rates, pronounced differences exist regarding the types of contraceptive methods used. Among China's subregions, contraceptive use rates vary considerably. The greater the percentage of minority groups in a subregion, the lower its contraceptive prevalence rate. The lower the proportion urban in an area, the greater the use of the IUD, except in areas with large numbers of minorities. Among the subregions, associations between urban/health variables and pill/condom use rates are strongly positive, and associations between urban/health variables and IUD use rates are strongly negative.

Adolescent↗