University of Wisconsin-Madison
UW Population Health Institute
610 Walnut Street
Madison, WI 53726
NBER Working Papers and Publications
|May 2011||Estimates of Crowd-Out from a Public Health Insurance Expansion Using Administrative Data|
with Laura Dague, Thomas DeLeire, Donna Friedsam, Daphne Kuo, Lindsey Leininger, Sarah Meier: w17009
We use a combination of administrative and survey data to estimate the fraction of individuals newly enrolled in public health coverage (Wisconsin's combined Medicaid and CHIP program) that had access to private, employer-sponsored health insurance at the time of their enrollment and the fraction that dropped this coverage. We estimate that after expansion of eligibility for public coverage, approximately 20% of new enrollees had access to private health insurance at the time of enrollment and that only 8% dropped this coverage (with the remaining 12% having both private and public coverage). We also identify an "upper bound" estimate, which suggests that the percentage of new enrollees with private insurance coverage at the time of enrollment is, at most, 27%. These estimates of crowd-o...