It has been believed that a social security system (SSS) is harmful to economic growth. However, it has been recognized recently that a SSS can encourage economic growth if the engine of the growth is human-capital accumulation. This paper uses an analytical model à la Uzawa/Lucas to examine...

This paper studies human-capital formation, labor-supply, and retirement decisions associated with four alternative regimes of social security. We implement a theoretical model with overlapping generations of households and two different ability types within each generation. We find that with a...

This paper studies the design of retirement and disability policies when individuals differ in both productivity and health. The second-best solution implies (downward) distortions in the (per-period) labor supply and in the choice of retirement age for some individuals, and lesser...