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Biomedical subjects

D L Poston

Publications and source records attributed to D L Poston.

At least 19 recordsLinked to original sources
PubMed1998

Interprovincial migration in China, 1985-1990.

"This paper investigates the patterns and determinants of interprovincial migration streams in China for the period 1985-1990.... Migration flow data from the 1990 Chinese census permit us to examine these issues and policies, and to ascertain the degree to which the objectives of the country's migration policies are being met. We address these and related matters by developing a human ecological model of interprovincial migration that is grounded in a straightforward gravity model which should help us better understand the patterns of migration to, and from, each of the provinces of China between 1985 and 1990."

Asia↗
PubMed1997

Population growth impacts of zero net international migration.

"In a country such as the United States, the contribution of net international migration to overall population change overshadows the contribution of natural increase.... Some analysts have assumed that if the same number of people leave and enter the country each year, then the effect of net international migration will be zero. This article examines that assumption and shows that it is fallacious. Examining the direct, indirect, total, and negative demographic impacts of zero net international migration through simulations with demographic data, we demonstrate that zero net international migration is not the same and therefore does not have the same demographic results and implications as zero international migration. We conclude that zero net international migration should not be confused with zero international migration."

Americas↗
PubMed1995

Zero net international migration: what does it really mean?

"The idea of ¿zero net migration' is gaining increasing currency. It has been assumed that if there is balance between the number of immigrants and emigrants, migration will have no impact on a country's population size. However, this article demonstrates that zero net migration is not necessarily the same as zero migration, and can result in a higher population than would have occurred without any migration at all." The examples of Germany and the United States are presented.

Americas↗
PubMed1994

How and why the one-child policy works in China.

The purpose of this chapter is to describe the implementation of China's one-child policy in terms of embeddedness in the Confucian tradition of morality in government. To do this, the authors describe the modern Chinese efforts to control its population. They describe briefly how the one-child policy evolved from earlier family planning policies and how it has been implemented in ways consistent with Confucian views. Finally, the authors describe key aspects of the implementation of this policy within four Chinese provinces from the perspective of the families who participated in a survey of schoolchildren in 1990.

Asia↗
PubMed1993

The academic, personality, and physical outcomes of only children in China.

Representative samples of 1,000 schoolchildren from 4 Chinese provinces were surveyed to compare the outcomes of only children to those of firstborn and later-born children. The children's ages ranged from 8 to 17 years, with half of the sample in the third grade and the other half in the sixth grade. 3 types of outcomes were considered. In terms of academics, differences between only children and others were found in 3 of the 4 provincial samples, with onlies being most likely to outscore others in verbal tests. In terms of personality evaluations, very few only-child effects were found. In 2 of the 4 provincial samples, only children were found to be taller or to weigh more than others. Taken together, these results suggest that the one-child policy in China is not producing a generation of "little emperors."

Achievement↗
PubMed1990

Socioeconomic structure and fertility in China: a county level investigation.

Analysis of the general fertility rate in the counties of China shows significant associations with infant mortality, illiteracy, and the percentage of the population employed in industry, but not with industrial or agricultural output. Urban counties differ from rural in the importance of the illiteracy rate. The associations in the rural counties vary according to the region of China in which they are located.

Adolescent↗
PubMed1989

Physical, achievement and personality characteristics of Chinese children.

The physical, achievement, and personality characteristics of Chinese schoolchildren are evaluated. The results of two surveys of Chinese schoolchildren, conducted in Beijing and Jilin Province, are presented. In the Beijing sample, the differences between only children and others were small but statistically significant, with the only children having higher scores in achievement and physical size. In the Jilin Province sample, the differences between only children and others were also small but significant. These differences were found entirely in physical characteristics, with only children being smaller, perhaps because the only children in the Jilin sample were much younger than the non-only children. Analyses of the combined sample of Beijing and Jilin schoolchildren indicated that the only-child advantages in achievement were found among children from urban families, not rural peasant families. While significant differences in height and weight were found in all three samples, none of the results indicated a significant difference in the proportion of body fat. None of the analyses indicated that only children had undesirable personalities, as judged by teachers and mothers.

Body Constitution↗
PubMed1989

China's super-large cities: dominance and integration.

"This study is mainly intended to survey the ecological structure, particularly the dominance and integration [of economic development], of 20 super-large cities in China. Most of the statistics used in this study come from the China Statistical Yearbook (1984), according to which all the 20 cities have a population of more than two million."

Asia↗