Using Matched Survey and Administrative Data to Estimate Eligibility for Medicare Part D Low Income Subsidy Program

Published in: Social Security Bulletin, v. 70, no. 2, 2010, p. 63-82

Posted on RAND.org on January 01, 2010

by Erik Meijer, Lynn A. Karoly, Pierre-Carl Michaud

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This article uses matched survey and administrative data to estimate, as of 2006, the size of the population eligible for the Low-Income Subsidy (LIS), which was designed to provide "extra help" with premiums, deductibles, and copayments for Medicare Part D beneficiaries with low income and limited assets. The authors employ individual-level data from the Survey of Income and Program Participation and the Health and Retirement Study to cover the potentially LIS-eligible noninstitutionalized and institutionalized populations of all ages. The survey data are matched to Social Security administrative data to improve on potentially error-ridden survey measures of income components and program participation.

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