Inevitable population aging and slower population growth will affect the economies of all nations in ways influenced by cultural values, institutional arrangements, and economic incentives. One outcome will be a tendency toward increased capital intensity, higher wages, and lower returns on capital, a tendency partially offset when the elderly are supported by public or private transfers rather than assets, and when economies are open, in which case aging will lead to increased flows of capital and labor. Rising human capital investment per child accompanies the falling fertility that drives population aging, and partially offsets slower labor force growth. Research to date finds little effect on technological progress or labor productivity. National differences in labor supply at older ages, per capita consumption of the elderly relative to younger ages, strength of public pension and health care systems, and health and vitality of the elderly all condition the impact of population aging on the economy. Policy responses include increasing the size of the labor force, mainly by raising the retirement age; reducing benefits and/or raising taxes for public transfer programs for the elderly, with concern for dead-weight loss and the fair distribution of costs across socioeconomic classes; investing more in children to increase the quality and productivity of the future labor force; and public programs that promote fertility by facilitating market work for women with children.
Ronald
IntroductionAs low fertility and longer life lead to increased numbers of elderly relative to younger adults, there is increasing concern about possible macroeconomic consequences. These consequences unfold on the time scale of demographic change, which is to say not from quarter-to-quarter or year-to-year, but rather decadeto-decade. Will rising old age dependency reduce consumption per capita? Will there be a deepening of capital, and if so, will rates of return drop, leading to an "asset price meltdown"? Or will capital instead flow to the younger developing countries, so that rates of return in developed countries fall less? Might the quality of more highly educated labor effectively substitute for quantity? Will an older labor force be less productive and will innovation and technological progress slow down? Will longer-working elderly crowd out employment of the young? Has population aging already brought secular stagnation to the rich nations of the world, underlying the anemic recovery from the Great Recession and condemning their economies to recurring asset price bubbles? This chapter discusses these and related points.Samuelson (1958, 1975a) was one of the first economists to focus attention on the broader issues surrounding population growth rates, old age dependency, capital deepening, and the central role of intergenerational transfers in shaping the relations among these. A landmark paper by Cutler, Poterba, Sheiner and Summers (1990) framed and analyzed the macroeconomic issues in greater detail with more demog...