The present paper constructs possible baseline economies with an aging population to analyze Social Security reform plans, using an overlapping generations (OLG) model with heterogeneous households. In this model, households receive idiosyncratic working ability shocks and mortality shocks....

This paper analyzes the macroeconomic and welfare effects of population aging and Social Security reform. First, a stochastic overlapping-generations model with heterogeneous agents is carefully extended to an aging society. The model uses the intermediate population projection of the Trustee...

Fundamental tax reform is examined in a heterogeneous overlapping-generations (OLG) model in which agents face idiosyncratic earnings shocks and uncertain life spans. Following Auerbach and Kotlikoff (1987), a Lump-Sum Redistribution Authority is used to rigorously examine efficiency gains over...

The overlapping generations (OLG) life-cycle model with heterogeneous agents has become the main workhorse for evaluating the welfare and macroeconomic effects of major fiscal policy changes, including reforms to tax and social insurance systems. This chapter shows how to construct and solve a...