This paper analyzes the impact of aging on capital accumulation and welfare in a country with a sizable unfunded social security system. Using a two-period overlapping-generation model with endogenous retirement decisions, we show that both the type of aging and the type of unfunded social security system are important in understanding this impact. We consider two demographic changes, declining fertility and increasing longevity, and three types of pensions, defined contributions, defined benefits and defined annuities, to investigate the differences in implications of aging.

This paper analyzes the impact of aging on capital accumulation and welfare in a country with a sizable unfunded social security system. Using a two-period overlapping-generation model with endogenous retirement decisions, we show that both the type of aging and the type of unfunded social security system are important in understanding this impact. We consider two demographic changes, declining fertility and increasing longevity, and three types of pensions, defined contributions, defined benefits and defined annuities, to investigate the differences in implications of aging.

International audienceThis letter analyzes the impact of economic integration on capital accumulation and capital flows when countries differ in their social security systems. Funding and early retirement both foster capital accumulation relative to pay-as-you-go pensions with flexible retirement. When economies integrate, both imply capital outflow possibly resulting in utility losses

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