43For more information about the analytical framework for assessing Social Security reform proposals offered by GAO, see Social  Criteria for Evaluating Social Security Reform Proposals (GAO/T-HEHS-99-94, March 25, 1999) and Social  Evaluating Reform Proposals (GAO/AIMD/HEHS-00-29, November 4, 1999).
The proposals with more information were updated in 1999 ut were originally written earlier.