TY - BOOK AU - Kotlikoff,Laurence J. AU - Smetters,Kent A. AU - Walliser,Jan TI - Social security : privatization and progressivity AV - HD7125 K674S PY - 1998/// CY - Cambridge, Mass PB - National Bureau of Economic Research KW - SOCIAL SECURITY KW - UNITED STATES KW - FINANCE KW - PRIVATIZATION KW - SOCIAL SECURITY TAXES KW - ECONOMICS KW - RESEARCH ER -