Table 1.

Summary of Data Sets and Linkages.

Data set	Level of observation	Frequency of observation	Method of linkage	Purpose of use
CARES (BC+ Enrollment and Eligibility)	Person	Month	SSN	Identify new Medicaid enrollees and their household members.
Third Party Liability	Person	Month	SSN	Observe whether enrollees have non-group coverage or if employed at fully insured firms have insurance during months enrolled.
Unemployment Insurance	Person-Firm	Quarter	SSN/FEIN	Observe employer of enrollees and their household members. Identify job transitions.
Department of Labor	Firm	Annual	FEIN	Observe whether firm has a self-insured plan.
Current Population Survey	Person	Annual	Regression Model	Predict probability of coverage for workers at self-insured firms.

Note. Further details available in text. BC+ = BadgerCare Plus; SSN = Social Security Number; FEIN = Federal Employer Identification Number.