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Title: The Future of Social Security

Author(s): Martin Gonzalez-Eiras and Dirk Niepelt

Publication Date: April 2007

Keyword(s): labour supply, Markov perfect equilibrium, probabilistic voting, saving and social security

Programme Area(s): International Macroeconomics and Public Economics

Abstract: We analyze the effect of the projected demographic transition on the political support for social security, and equilibrium outcomes. Embedding a probabilistic-voting setup of electoral competition in the Diamond (1965) OLG model, we find that intergenerational transfers arise in the absence of altruism, commitment, or trigger strategies. Closed-form solutions predict population ageing to lead to higher social security tax rates, a rising share of pensions in GDP, but eventually lower social security benefits per retiree. The response of equilibrium tax rates to demographic shocks reduces old-age consumption risk. Calibrated to match features of the U.S. economy, the model suggests that, in response to the projected demographic transition, social security tax rates will gradually increase to 16 percent; other policies that distort labour supply will become less important; and in contrast with frequently voiced fears, labour supply therefore will rise.

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Bibliographic Reference

Gonzalez-Eiras, M and Niepelt, D. 2007. 'The Future of Social Security'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=6245