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Why Did the SSI-Disabled Program Grow So Much? Disentangling the Effect of Medicaid

  • Aaron Yelowitz


The number of participants in the SSI program grew by 1.1 million from 1987 to 1993. This paper examines the role of Medicaid on the SSI participation decision. I use the rapid growth in average Medicaid expenditure as a proxy for its value. OLS estimates of Medicaid's effect may be biased because of omitted variables bias and measurement error. I therefore apply two-stage least squares to estimate Medicaid's effect, using average Medicaid expenditure for blind SSI recipients as an instrument. These estimates show that rising Medicaid expenditure significantly increased SSI participation among adults with low permanent incomes, explaining 20 percent of the growth.

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Paper provided by UCLA Department of Economics in its series UCLA Economics Working Papers with number 748.

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Date of creation: 01 Feb 1996
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Handle: RePEc:cla:uclawp:748
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  1. Moffitt, Robert, 1983. "An Economic Model of Welfare Stigma," American Economic Review, American Economic Association, vol. 73(5), pages 1023-35, December.
  2. Janet Currie & Jonathan Gruber & Michael Fischer, 1994. "Physician Payments and Infant Mortality: Evidence from Medicaid Fee Policy," NBER Working Papers 4930, National Bureau of Economic Research, Inc.
  3. R. A. Moffitt, . "The effect of work and training programs on entry and exit from the welfare caseload," Institute for Research on Poverty Discussion Papers 1025-93, University of Wisconsin Institute for Research on Poverty.
  4. Lundberg, S. & Plotnick, R.D., 1994. "Adolescent Premarital Childbearing: Do Economic Incentives Matters?," Working Papers 94-4, University of Washington, Department of Economics.
  5. Jonathan Gruber & Brigitte C. Madrian, 1994. "Health insurance and job mobility: The effects of public policy on job-lock," Industrial and Labor Relations Review, ILR Review, Cornell University, ILR School, vol. 48(1), pages 86-102, October.
  6. Janet Currie & Jonathan Gruber, 1994. "Saving Babies: The Efficacy and Cost of Recent Expansions of Medicaid Eligibility for Pregnant Women," NBER Working Papers 4644, National Bureau of Economic Research, Inc.
  7. Joshua D. Angrist, 1991. "Instrumental Variables Estimation of Average Treatment Effects in Econometrics and Epidemiology," NBER Technical Working Papers 0115, National Bureau of Economic Research, Inc.
  8. Joshua D. Angrist & Alan B. Krueger, 1990. "Does Compulsory School Attendance Affect Schooling and Earnings?," NBER Working Papers 3572, National Bureau of Economic Research, Inc.
  9. B. Wolfe & S. C. Hill, . "The effect of health on the work effort of low-income single mothers," Institute for Research on Poverty Discussion Papers 979-92, University of Wisconsin Institute for Research on Poverty.
  10. Anne E. Winkler, 1991. "The Incentive Effects of Medicaid on Women's Labor Supply," Journal of Human Resources, University of Wisconsin Press, vol. 26(2), pages 308-337.
  11. A. S. Yelowitz, . "Using the Medicare Buy-In Program to Estimate the Effect of Medicaid on SSI Participation," Institute for Research on Poverty Discussion Papers 1102-96, University of Wisconsin Institute for Research on Poverty.
  12. Brigitte C. Madrian, 1993. "Employment-Based Health Insurance and Job Mobility: Is There Evidence ofJob-Lock?," NBER Working Papers 4476, National Bureau of Economic Research, Inc.
  13. Jeff Grogger & Stephen G. Bronars, 1997. "The Effect of Welfare Payments on the Marriage and Fertility Behavior of Unwed Mothers: Results from a Twins Experiment," NBER Working Papers 6047, National Bureau of Economic Research, Inc.
  14. A. S. Yelowitz, . "The Medicaid notch, labor supply, and welfare participation: Evidence from eligibility expansions," Institute for Research on Poverty Discussion Papers 1084-96, University of Wisconsin Institute for Research on Poverty.
  15. Moffitt, Robert & Wolfe, Barbara L, 1992. "The Effect of the Medicaid Program on Welfare Participation and Labor Supply," The Review of Economics and Statistics, MIT Press, vol. 74(4), pages 615-26, November.
  16. James J. Heckman & Thomas E. MaCurdy, 1985. "A Simultaneous Equations Linear Probability Model," Canadian Journal of Economics, Canadian Economics Association, vol. 18(1), pages 28-37, February.
  17. Robert Moffitt & David Ribar & Mark Wilhelm, 1998. "The Decline of Welfare Benefits in the US: The Role of Wage Inequality," Economics Working Paper Archive 373, The Johns Hopkins University,Department of Economics.
  18. Moulton, Brent R., 1986. "Random group effects and the precision of regression estimates," Journal of Econometrics, Elsevier, vol. 32(3), pages 385-397, August.
  19. Barbara L. Wolfe & Steven C. Hill, 1995. "The Effect of Health on the Work Effort of Single Mothers," Journal of Human Resources, University of Wisconsin Press, vol. 30(1), pages 42-62.
  20. Rebecca M. Blank, 1989. "The Effect of Medical Need and Medicaid on AFDC Participation," Journal of Human Resources, University of Wisconsin Press, vol. 24(1), pages 54-87.
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