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Casey B. Mulligan, Xavier Sala-i-Martin
NBER Working Paper No. 7118
Issued in May 1999
NBER Program(s): AG
PE
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---- Abstract -----
166 countries have some kind of public old age pension. What economic forces create and sustain old age Social Security as a public program? We document some of the internationally and historically common features of Social Security programs including explicit and implicit taxes on labor supply, pay-as-you-go features, intergenerational redistribution, benefits which are increasing functions of lifetime earnings and not means-tested. We partition theories of Social Security into three groups: political', efficiency' and narrative' theories. We explore three political theories in this paper: the majority rational voting model (with its two versions: the elderly as the leaders of a winning coalition with the poor' and the once and for all election' model), the time-intensive model of political competition' and the taxpayer protection model'. Each of the explanations is compared with the international and historical facts. A companion paper explores the efficiency' and narrative' theories and derives implications of all the theories for replacing the typical pay-as-you-go system with a forced savings plan.
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