As the U.S. population ages, the growing retiree-worker ratio increases the burden of public retirement systems. Is it efficient to maintain a defined benefit social security system? Should PAYGO benefits be reduced and private retirement savings be encouraged? The paper examines these questions...

As the U.S. population ages, the growing retiree-worker ratio increases the burden of public retirement systems. Is it efficient to maintain a defined benefit social security system? Should PAYGO benefits be reduced and private retirement savings be encouraged? The paper examines these questions...

We develop a heterogeneous agent, overlapping generations model with nonhomothetic preferences that nests several explanations for the decline in the natural rate of interest (r*) suggested in the literature: demographic change, a slowdown in productivity growth, a rise in income inequality, and...