The Dynamics of an Aging Population: The Case of Four OECD Countries

Alan Auerbach, Laurence Kotlikoff, Robert Hagemann and Giuseppe Nicoletti

No 2797, NBER Working Papers from National Bureau of Economic Research, Inc

Abstract: Demographic changes, such as those anticipated in most OECD countries, have many economics effects that impinge on a country's fiscal viability. Evaluation of the effects of associated changes in capital-labor ratios and the welfare and behavior of different generations requires the use of a dynamic general equilibrium model. The 75 generations - 250 year demographic simulation model, presented in Auerbach and Kotlikoff (1987, Chapter 11), has been modified to incorporate bequest behavior, technological change, the possibility that the economy is open to international trade, and government consumption expenditures that depend on the age composition of the population. The model has been further adapted to study the effects of impending demographic changes in Japan, the Federal Republic of Germany, Sweden and the United States. The simulation results indicate that these changes will have a major impact on rates of national saving, real wage rate and current accounts. One of this paper's fundamental lessons is that allowing for general equilibrium adjustments reduces the adverse welfare effects of increasing dependency ratios. Nevertheless, the welfare costs, and particularly their distributions across cohorts, pose serious challenges for policy makers in some cases.

Date: 1989-02
Note: AG PE
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Published as OECD Economic Studies, No. 12, pp. 97-130, (Spring 1989).

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