7[1]JAMES E,SMALHOUT J,VITTAS D.Administrative Costs and the Organization of Individual Account Systems:A Comparative Perspective[ R ].Washington:The World Bank,1999.
8[2]SHAH A,FERNANDES K.The Relevance of Index Funds for Pension Investment in Equities [R].Washington:The World Bank,2000.
9[3]BODIE Z,KANE A,MARCUS A.Investments [ M ].Boston:Richard D.Irwin INC,1989:735.
10[4]LYNCHAW,MENDENHALLRR.New evidence on stock price effects associated with changes in the S&P 500 index[J].Journal of Business,1997,70(3):351-383.
