title: Why did the SSI-disabled program grow so much? Disentangling the effect of Medicaid.
abstract: 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% of the growth.
authors: University of California, Los Angeles 90095, USA. yelowitz@prometheus.sscnet.ucla.edu
authors: A S
authors: AS
authors: Yelowitz
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D006233:Persons with Disabilities / Q000706:statistics & numerical data*; D004608:Eligibility Determination; D005102:Health Expenditures / Q000706:statistics & numerical data*; D006301:Health Services Needs and Demand / Q000191:economics / Q000706:statistics & numerical data* / Q000639:trends; D006302:Health Services Research; D006801:Humans; D007182:Income; D008484:Medicaid / Q000191:economics / Q000458:organization & administration / Q000706:statistics & numerical data*; D008875:Middle Aged; D017059:Models, Econometric; D012943:Social Security / Q000706:statistics & numerical data / Q000639:trends*; D014481:United States; D016526:Workload / Q000706:statistics & numerical data