We ask whether a PAYG-financed social security system is welfare improving in an economy with idiosyncratic and aggregate risk. We argue that interactions between the two risks are important for this question. One is a direct interaction in the form of a countercyclical variance of idiosyncratic...

We ask whether a PAYG-financed social security system is welfare improving in an economy with idiosyncratic and aggregate risk. We argue that interactions between the two risks are important for this question. One is a direct interaction in the form of a countercyclical variance of idiosyncratic...

At the design of public pension systems, the designers frequently neglect that higher earners statistically live longer, and possibly also retire later. Since the first difference has recently been rising steeply, this negligence is less and less tolerable, especially with nonfinancial defined...

A basic function of public pension systems is to guarantee a satisfactory old-age income for short-sighted low earners. In proportional (i.e., earnings-related) systems, this requires a sufficiently high contribution rate. At the same time, there should be a cap on the pension contribution base...

Studying the age-dimension of the probability distribution of pensions while assuming steadily rising real wages and time-invariant benefit-rules, two factors play important roles: (i) the weight of the wages in indexation of benefits in progress; (ii) the longevity gap. Factor (i) acts against...

A general framework is analyzed which contains several special transfer (tax and pension) models. In our static two-overlapping-generation framework, every individual works in the first stage of the adult age, while is retired in the second. The government operates a balanced linear transfer...