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Dyfyniad Arddull ChicagoBohn, Henning. Social Security and Demographic Uncertainty: The Risk Sharing Properties of Alternative Policies. Cambridge: National Bureau of Economic Research, 1999.
Dyfyniad MLABohn, Henning. Social Security and Demographic Uncertainty: The Risk Sharing Properties of Alternative Policies. National Bureau of Economic Research, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.