5Modigliani F,Modigliani L.Risk 2 adjusted performance[J] Journal of Portfolio Management,1997,23(2):452.
6Iglesias,Augusto,Palacios,Robert J,2000,"Management Public Pension Reserve",The World Bank Research Working Papers.
7Social security administration of US,1999,"Social Security Programs The World-1999
8Srinivas,P.S.,Whithouse,Edward,YERMO,JUAN,2000,"Regulating Private Pension Funds Structure,Performance and Investment:Cross-Country Evidence ",The World Bank