01017nam0-22003131i-450-990003224850403321000322485FED01000322485(Aleph)000322485FED0100032248520000920d--------km-y0itay50------baitaIT<<The >>Transition to Investment-based Social Security When Portfolio Returns and Capital Profitability Are UncertainMartin Feldstein, Elena Ranguelova, Andrew SamwickWorking paper seriesNBER7016Sicurezza socialeM/4.25M/4.3Feldstein,Martin<1939- >Ranguelova,ElenaSamwick,AndrewITUNINARICAUNIMARCBK990003224850403321PaperSESSESTransition to Investment-based Social Security When Portfolio Returns and Capital Profitability Are Uncertain454707UNINAING01