4MARTIN P. P..Comparing Replacement Rates under Private and Federal Retirement Systems[R].Baltimore Mary- land : Social Security Administration, Social Security Bulletin, 2003,65( 1 ) : 17-25.
5PALACIOUS R., Whitehouse E..Civil-service Pension Schemes ai-ound the World [ R].Washington DC: World Bank, Special Discussion Paper No. 0602, May, 2006 : 22-57.