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By: Xavier Sala-i-Martin.
Contributors: National Bureau of Economic Research.
Series: NBER working paper series -- working paper no. 4186; Working paper series (National Bureau of Economic Research) -- working paper no. 4186.
Publisher: National Bureau of Economic Research
Published: 1992
Place of publication: Cambridge, MA
Language: eng
Number of pages: 50
Subjects: Retirement, Mandatory -- Mathematical models.; Industrial productivity -- Mathematical models.; Social security -- Mathematical models.; Pensions -- Mathematical models.
Notes: "October 1992."

Includes bibliographical references (p. 47-50).

Binghamton University Libraries' copy bound with: Investments of uncertain cost.