Social Security and Institutions for Intergenerational, Intragenerational, and International Risk Sharing

58 Pages Posted: 24 Sep 1998 Last revised: 26 Aug 2022

See all articles by Robert J. Shiller

Robert J. Shiller

Yale University - Cowles Foundation; National Bureau of Economic Research (NBER); Yale University - International Center for Finance

Date Written: July 1998

Abstract

Social security system old age insurance systems are devices for the sharing of income risks of elderly people with others. Risks can be shared intergenerationally (with the young of the same country), intragenerationally (with other elderly of the same country), or internationally (with foreigners). Barriers to individuals themselves sharing their risks intergenerationally, intragenerationally, or internationally are described. Optimal design of government-sponsored social security systems is considered in light of these barriers. Alternative benefits and contributions formulas for pay-as-you-go social security systems are defined and compared with existing and proposed formulas in terms of their ability to fulfill the government's role in promoting risk sharing. Benefits for each retired person may be tied to that person's lifetime income without causing (as with the US benefits formula today) aggregate benefits for all elderly today to be tied to their past aggregate income.

Suggested Citation

Shiller, Robert J., Social Security and Institutions for Intergenerational, Intragenerational, and International Risk Sharing (July 1998). NBER Working Paper No. w6641, Available at SSRN: https://ssrn.com/abstract=123174

Robert J. Shiller (Contact Author)

Yale University - Cowles Foundation ( email )

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