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The Measurement of Medicaid Coverage in the SIPP: Evidence From a Comparison of Matched Records

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  • David Card
  • Andrew K.G. Hildreth
  • Lara D. Shore-Sheppard

Abstract

This paper studies the accuracy of reported Medicaid coverage in the Survey of Income and Program Participation (SIPP) using a unique data set formed by matching SIPP survey responses to administrative records from the State of California. Overall, we estimate that the SIPP underestimates Medicaid coverage in the California population by about 10 percent. The probability that a SIPP respondent who is covered by Medicaid in a given month correctly reports their coverage is around 85 percent. The corresponding probability for low-income children is higher – around 90 percent. Under-reporting by those who are actually in the Medicaid system is partially offset by over-reporting of coverage by people who are not. Some of these false positive responses are attributable to errors and missing data in the administrative system, rather than to problems in the SIPP. Taking account of these errors, the estimated false positive rate for the population as a whole is about 1.5 percent, and 4-5 percent for poor children.

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Bibliographic Info

Article provided by American Statistical Association in its journal Journal of Business and Economic Statistics.

Volume (Year): 22 (2004)
Issue (Month): (October)
Pages: 410-420

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Handle: RePEc:bes:jnlbes:v:22:y:2004:p:410-420

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  1. David Card & Lara D. Shore-Sheppard, 2002. "Using Discontinuous Eligibility Rules to Identify the Effects of the Federal Medicaid Expansions on Low Income Children," NBER Working Papers 9058, National Bureau of Economic Research, Inc.
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Cited by:
  1. David W.Johnston & Carol Propper & Michael A.Shields, 2007. "Comparing Subjective and Objective Measures of Health: Evidence from Hypertension for the Income/Health Gradient," The Centre for Market and Public Organisation 07/171, Department of Economics, University of Bristol, UK.
  2. Mazzolari, Francesca & Ragusa, Giuseppe, 2012. "Time Limits: The Effects on Welfare Use and Other Consumption-Smoothing Mechanisms," IZA Discussion Papers 6993, Institute for the Study of Labor (IZA).
  3. Cascio, Elizabeth U., 2005. "School Progression and the Grade Distribution of Students: Evidence from the Current Population Survey," IZA Discussion Papers 1747, Institute for the Study of Labor (IZA).
  4. Rosemary Hyson & Alice Zawacki, 2008. "Health-Related Research Using Confidential U.S. Census Bureau Data," Working Papers 08-21, Center for Economic Studies, U.S. Census Bureau.
  5. Brachet, Tanguy, 2008. "Maternal Smoking, Misclassification, and Infant Health," MPRA Paper 21466, University Library of Munich, Germany.

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