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 form of a countercyclical variance of idiosyncratic...

On average, "young" people underestimate whereas "old" people overestimate their chances to survive into the future. We parameterize a learning model of subjective survival beliefs with psychological biases such that we replicate these patterns. We then combine this learning model with an...

to model correctly the labor market distortions arising from the pension system.

and income risk.

Projected demographic changes in industrialized and developing countries vary in extent and timing but will reduce the share of the population in working age everywhere. Conventional wisdom suggests that this will increase capital intensity with falling rates of return to capital and increasing...

This paper employs a multi-country large scale Overlapping Generations model with uninsurable labor productivity and mortality risk to quantify the impact of the demographic transition towards an older population in industrialized countries on world-wide rates of return, international capital...

Population aging and pension reform will have profound effects on international capital markets. First, demographic change alters the time path of aggregate savings within each country. Second this process may be amplified when a pension reform shifts old-age provision towards more pre-funding....

This paper develops a globally convergent algorithm which modifies standard block Gauss-Seidel iterations used by tatonnement methods for solving large scale deterministic heterogenous agent models. It is shown that the restrictions on the structure of the Jacobi matrix implicit in any such...

In all major industrialized countries the population is aging over time, reducing the fraction of the population in working age. Consequently labor is expected to be scarce, relative to capital, with an ensuing decline in real returns on capital and increases in real wages. This paper employs a...

Throughout the world, population aging is a major challenge that will continue well into the 21st century. While the patterns of the demographic transition are similar in most countries, timing differs substantially, in particular between industrialized and less developed countries. To the...