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

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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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File URL: http://web.williams.edu/Economics/wp/shoresheppardcard-hildreth-shore-sheppard-july03a.pdf
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Bibliographic Info

Paper provided by Department of Economics, Williams College in its series Department of Economics Working Papers with number 2003-11.

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Length: 39 pages
Date of creation: Dec 2002
Date of revision:
Publication status: published in Journal of Business and Economic Statistics, October 2004, v. 22, iss. 4, pp. 410-20.
Handle: RePEc:wil:wileco:2003-11

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  1. David Card & Lara D. Shore-Sheppard, 2003. "Using Discontinuous Eligibility Rules to Identify the Effects of the Federal Medicaid Expansions on Low Income Children," Department of Economics Working Papers 2003-09, Department of Economics, Williams College.
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Cited by:
  1. 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).
  2. Brachet, Tanguy, 2008. "Maternal Smoking, Misclassification, and Infant Health," MPRA Paper 21466, University Library of Munich, Germany.
  3. Johnston, David W. & Propper, Carol & Shields, Michael A., 2007. "Comparing Subjective and Objective Measures of Health: Evidence from Hypertension for the Income/Health Gradient," IZA Discussion Papers 2737, Institute for the Study of Labor (IZA).
  4. 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).
  5. 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.

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