Differential Fertility and the Distribution of Traits: The Case of IQ

  title={Differential Fertility and the Distribution of Traits: The Case of IQ},
  author={Samuel H. Preston and Cameron Dougall Campbell},
  journal={American Journal of Sociology},
  pages={997 - 1019}
A recurrent fear during the past century is that the mean IQ level of populations will decline because persons with lower IQ scores have above-average fertility. Most microlevel data demonstrate such fertility differentials, but population IQ levels have risen rather than fallen. In this article, a simple two-sex model shows that negative fertility differentials are consistent with falling, rising, or constant IQ distributions. Under a wide variety of conditions, a constant pattern of fertility… 
Mortality, Fertility and Persistent Income Inequality
  • J. Sarkar
  • Economics
    Southern Economic Journal
  • 2008
Many developing countries are plagued by persistent inequality in income distribution. While a growing body of economic-demographic literature emphasizes differential fertility channel, this paper
Differential Fertility, Intergenerational Educational Mobility, and Racial Inequality.
Abstract Recent commentary has suggested that the relatively high fertility of poorly educated women tends to dampen the average intellectual qualifications of the population. To evaluate this claim
Intergenerational Dynamics and the Fertility Transition
Fertility change is distinct from other forms of social and economic change because it directly alters the size and composition of the next generation. This paper studies how the intergenerational
Differential Fertility, Human Capital, and Development
Using micro-data from 48 developing countries, this paper studies changes in cross-sectional patterns of fertility and child investment over the course of the demographic transition. Before 1960,
Demographic Pathways of Intergenerational Effects: Fertility, Mortality, Marriage and Women's Schooling in Indonesia
We use data from Indonesia and a demographic modeling strategy to estimate the total effect of increasing women’s schooling for the schooling of the next generation. This approach differs from
Income Distribution Dynamics with Endogenous Fertility
Developing countries with highly unequal income distributions, such as Brazil or South Africa, face an uphill battle in reducing inequality. Educated workers in these countries have a much lower
Income-distribution dynamics with endogenous fertility.
Developing countries with highly unequal income distributions, such as Brazil or South Africa, face an uphill battle in reducing inequality. Educated workers in these countries have a much lower
Family structure, intergenerational mobility, and the reproduction of poverty: Evidence for increasing polarization?
Examination of patterns of intergenerational inheritance in the population over the long run using data from the National Longitudinal Surveys and a model of population renewal suggests that current rates of interGenerational inheritance have little effect on population change over time.
Demographic Dynamics of Poverty and Income Inequality in Brazil
There is a common belief that higher reproduction rates among the poor will increase average poverty levels, drive inequality up, prevent economic development and reduce upward mobility. To test this


The Dynamics of Population Growth, Differential Fertility, and Inequality: Note
This note challenges the proposition David Lam made in his attempt to examine the relationship between population growth and the distribution of income. In the first 2 sections of his paper in which
Differential fertility, unwanted fertility, and racial trends in occupational achievement.
  • S. Preston
  • Economics
    American sociological review
  • 1974
The effects of maintaining current class differences in fertility on future occupational achievement and mobility levels are estimated and the results indicate that the differential reproductivity for occupational distributions is more influential among the nonwhite population in the U.S.
Intelligence and family size reconsidered.
The IQ selection differential is considered, which provides an estimate of what the generational change in mean IQ would be if, hypothetically, each child in the birth histories had the same IQ as the mean of its parents’ IQ's.
Intelligence and family size: a paradox resolved.
Abstract IQ data was studied for over a thousand families for both parents and offspring, and also for the non‐reproducing siblings of parents. The inclusion of these siblings allowed the authors to
The fate of national intelligence: test of a thirteen-year prediction.
1. Historical Background of the Present Research I T is a commonplace of genetics that under conditions of differential survival the mean characteristics of a population are likely to show a
Two-Sex Demographic Models
  • R. Pollak
  • Economics
    Journal of Political Economy
  • 1990
Classical stable population theory, the standard model of population age structure and growth, is ill suited to addressing many issues that concern economists and demographers because it is a
Applied Mathematical Demography
This book explains the development of the Matrix Model Framework and some types of Instability and discusses the Demographic Theory of Kinship and Microdemography.
Selection models with fertility differences
It is proved that there are at most five polymorphisms in a symmetric model and the stability problem can be discussed at least for the symmetric equilibria.
Theory of Population Genetics and Evolutionary Ecology: An Introduction
This chapter discusses Evolutionary Ecology, a science of interaction between humans and nature, and its applications in the context of population genetics and ecology.