We study the welfare effects of earnings testing flat-rate old-age benefits in a quantitative overlapping generations model with idiosyncratic labor income risk. In our model economy, even a moderate earnings testing reduces individuals’ expected lifetime utility, whenever other taxes are...

Migration between countries with earnings-related and flat-rate pay-as-you-go social security systems may change human capital investments in both countries. The possibility of emigration boosts investments in human capital in the country with flat-rate benefits. Correspondingly, those expecting...

This paper analyzes simultaneous voting on the wage tax rate and investment in public education with three overlapping generations and productivity differences inside each cohort. Wage tax revenue finances public education and social security benefits. The presence of productivity differences...

We suggest a political economy explanation for the stylized fact that intragenerationally more redistributive social security systems are smaller. We relate the stylized fact to an "efficiencyredistribution" trade-off to be resolved by political process. The inefficiency of social security...