The world's population is aging. Virtually no nation is immune to this demographic trend and the challenges it brings for future generations. Relative growth of the elderly population is fueling debate about reform of social security programs in the United States and other developed nations. In...

This paper describes how stochastic population forecasts are used to inform and analyze policies related to government spending on the elderly, mainly in the context of the industrialized nations. The paper first presents methods for making probabilistic forecasts of demographic rates,...

We assess quantitatively the effect of exogenous reductions in fertility on output per capita. Our simulation model allows for effects that run through schooling, the size and age structure of the population, capital accumulation, parental time input into child-rearing, and crowding of fixed...

In this paper, the author deals with the question how to make PAYG pension systems financially resistant to fluctuating fertility rates. The author presents two pension schemes that lead to a permanently balanced budget but differ in the mixture of changes in the contribution rates and...

In this paper I study how PAYG pension systems of the notional defined contribution type can be designed such that they remain financially stable in the presence of increasing life expectancy. For this to happen two crucial parameters must be set in an appropriate way. First, the remaining life...

In this paper I study the impact of increasing longevity on pay-as-you-go pension systems. First, I show that increasing longevity increases their internal rate of return. The size of the effect di ers for di erent policy regimes. It is higher for the case where the retirement age is increased...

The paper studies how the rates of deduction for early retirement have to be determined in PAYG systems in order to keep their budget stable. I show that the budget-neutral deductions depend on the speci_c rules of the pension system and on the choice of the discount rate which itself depends on...

The aging of the global population is in the headlines following a report that China's population fell as deaths surpassed births. Pundits worry that a declining Chinese workforce means trouble for other economies that have come to rely on China's exports. France is pushing through an increase...

We examine the dynamic interaction of the population age structure, economic dependency, and fertility, paying particular attention to the role of intergenerational transfers. In the short run, a reduction in fertility produces a “demographic dividend” that allows for higher consumption. In...

Population aging is primarily the result of past declines in fertility, which produced a decadeslong period in which the ratio of dependents to working age adults was reduced. Rising old-age dependency in many countries represents the inevitable passing of this “demographic dividend.”...