We develop a model where individuals differ in productivity and in longevity. Benefits from the public pay-as-you-go pension system take the form of a collective annuity, with both a contributive (Bismarckian) component (based on the worker's past earnings) and a flat (Beveridgean) part. Voters...

This paper develops an analytical framework for the design of pension systems, taking the functions of the pension system as the guiding principle. It discusses the economic principles underlying these functions and their implementation in practice. In particular, it distinguishes three...

This paper takes stock of the evolution in pension systems and the challenges that remain for the future. It derives a typology of pension systems and uses this to discuss the strengths and weaknesses of alternative systems. After describing how pension systems in the industrial world have been...