Demographic change is putting pressure on the sustainability of State Pension systems in many developed countries. In Ireland, there have been recent calls to reform the system of contributions and/or increase the State Pension age in order to avoid significant shortfalls in the Social Insurance...

This paper proposes a method for the welfare analysis of pay-as-you-go social security systems. We derive a formula for the welfare consequences of a permanent marginal change in the payroll tax rate that is valid under weak assumptions about the deep structure of the economy. Our approach...

This study compares alternative designs of an unfunded pension system. Convex combinations between a fixed contribution rate and a fixed benefit rate are considered. The objective is to maximize the expected ex-ante welfare under stochastic fertility. The model is a three-period CGE framework...