The Measurement of Medicaid Coverage in the SIPP: Evidence from California, 1990-1996
AbstractThis 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 populaton by about 10 percent. Among SIPP respondents who can be matched to administrative records, we estimate that the probability someone reports Medicaid coverage in a month when they are actually covered is around 85 percent. The corresponding probability for low-income children is even higher – at least 90 percent. These estimates suggest that the SIPP provides reasonably accurate coverage reports for those who are actually in the Medicaid system. On the other hand, our estimate of the false positive rate (the rate of reported coverage for those who are not covered in the administrative records) is relatively high: 2.5 percent for the sample as a whole, and up to 20 percent for poor children. Some of this is due to errors in the recording of Social Security numbers in the administrative system, rather than to problems in the SIPP.
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Bibliographic InfoPaper provided by Center for Economic Studies, U.S. Census Bureau in its series Working Papers with number 02-21.
Date of creation: Sep 2002
Date of revision:
CES; economic; research; micro; data; microdata; chief; economist;
Other versions of this item:
- David Card & Andrew K. G. Hildreth & Lara D. Shore-Sheppard, 2001. "The Measurement of Medicaid Coverage in the SIPP: Evidence from California, 1990-1996," NBER Working Papers 8514, National Bureau of Economic Research, Inc.
- David Card & Andrew K. G. Hildreth & Lara Dawn Shore-Sheppard, 2001. "The Measurement of Medicaid Coverage in the SIPP: Evidence from California, 1990-1996," JCPR Working Papers 241, Northwestern University/University of Chicago Joint Center for Poverty Research.
- I38 - Health, Education, and Welfare - - Welfare and Poverty - - - Government Programs; Provision and Effects of Welfare Programs
- C81 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Microeconomic Data
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Lara D. Shore-Sheppard, 2005.
"Stemming the Tide? The Effect of Expanding Medicaid Eligibility on Health Insurance,"
NBER Working Papers
11091, National Bureau of Economic Research, Inc.
- Lara D. Shore-Sheppard, 2005. "Stemming the Tide? The Effect of Expanding Medicaid Eligibility on Health Insurance," Department of Economics Working Papers 2005-06, Department of Economics, Williams College.
- van der Klaauw, Wilbert, 2005. "Comment," Journal of Business & Economic Statistics, American Statistical Association, vol. 23, pages 154-157, April.
- Jacob Alex Klerman & Jeanne S. Ringel & Beth Roth, 2005. "Under-Reporting of Medicaid and Welfare in the Current Population Survey," Working Papers 169-3, RAND Corporation Publications Department.
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