The Role of Relative Cohort Size and Relative Income in the Demographic Transition

This paper summarizes the results of other analyses by the author with regard to the importance of relative cohort size (RCS) in determining male relative income (the income of young adults relative to prime-age workers) and general patterns of economic growth, and in turn influencing fertility in the currently more-developed nations. It then goes on to demonstrate that these same effects appear to have been operating in all of the 100-odd nations which have experienced the fertility transition since 1950. Parameter estimates based on the experience of all 189 countries identified by the United Nations between 1950 and 1995 are used to simulate the effects on fertility of migration from Third to First World countries. This exercise suggests that we get the best of all possible outcomes with migration: population is reduced in overcrowded Third World nations, total world population growth is substantially reduced, and scores of children are given the opportunity of growing up with all the educational and health advantages of United States residents

Relative Cohort Size: Source of a Unifying Theory of Global Fertility Transition

Using United Nations estimates of age structure and vital rates for nearly 200 nations at five-year intervals from 1950 through 1995, this paper demonstrates how changes in relative cohort size appear to have affected patterns of fertility across nations since 1950--not just in developed countries, but perhaps even more importantly in countries as they pass through the demographic transition. The increase in relative cohort size (defined as the proportion of the population aged 15 to 24 relative to that aged 25 to 59) which occurs as a result of declining mortality rates among children and young adults during the demographic transition, appears to act as the mechanism of transmission which determines when the fertility portion of the transition begins. As hypothesized by Richard Easterlin, the increasing proportion of young adults would generate a downward pressure on young men\u27s relative wages, which in turn causes young adults to accept a trade-off between family size and material well-being, setting in motion a cascade or snowball effect in which total fertility rates tumble as social norms regarding acceptable family sizes begin to change. Thus relative cohort size can be thought of as the mechanism which prevents excessive rates of population change--reducing fertility when previous high rates, in combination with low mortality rates, have caused relative cohort size to increase, and increasing fertility when previous low rates have caused relative cohort size to decline

The Baby Boom As It Ages: How Has It Affected Patterns of Consumptions and Savings in the United States?

Using detailed estimates of personal consumption expenditures at the state level for 1900, 1929, 1970, and 1982 developed by Stanley Lebergott, this paper demonstrates that the passage of the Baby Boom from childhood through the teen years and into family formation would have caused market swings in patterns of aggregate consumption and savings in the United States during the past 50 years. The effect of age structure on personal consumption expenditures is estimated using population by single year of age from 0 to 85, revealing the expected pattern of life cycle consumption and savings in the adult years. In addition, however, a strong age-related pattern of consumption expenditures for children is demonstrated, with a strong savings component. The pattern, which emerges for children in all periods, is strongly U-shaped, with the highest levels of expenditure in the earliest years and for teens, and a marked pattern of saving when children are aged about 5 through 12

Explaining the Labor Force Participation of Women 20-24

Between about the mid 1960s and the late 1970s there was a remarkable rise in the labor force participation of women and then a leveling off that has persisted through the mid 1990s. This paper attempts to explain the labor force participation of women 20-24 over this period. A "relative income" variable is constructed based on Easterlin's (1980) relative income hypothesis, and this is found to be an important explanatory variable. Easterlin's "cohort wage" hypothesis is also used in the analysis. The basic equation estimated does very well in various tests that were performed on it, and it appears to explain well the rapid rise and then leveling off of the labor force participation of young women.

Explaining the Labor Force Participation of Women 20-24

Between about the mid 1960s and the late 1970s there was a remarkable rise in the labor force participation of women and then a leveling off that has persisted through the mid 1990s. This paper attempts to explain the labor force participation of women 20-24 over this period. A “relative income” variable is constructed based on Easterlin’s (1980) relative income hypothesis, and this is found to be an important explanatory variable. Easterlin’s “cohort wage” hypothesis is also used in the analysis. The basic equation estimated does very well in various tests that were performed on it, and it appears to explain well the rapid rise and then leveling off of the labor force participation of young women

The Fortune of One\u27s Birth: Relative Cohort Size and the Youth Labor Market in the United States

Using two different measures of relative cohort size--one indicating the size and placement of an individual\u27s own birth cohort, and the other the ratio of young to prime-age adults in the United States in that year--it has been possible to isolate strong effects of the population age structure on wages in the United States over the past 33 years. These effects have been strong enough that virtually all of the observed change in the experience premium, and a substantial proportion of the changes in the college wage premium, can be explained by the relative cohort size variables alone. Even changes in the amount of within-group variance in wages appear to be largely a function of changing age structure, and absolute wage levels have been strongly affected by these demographic changes, suggesting that population growth can have positive effects on the economy