We estimate similar specifications of the same general model to measure the impacts of state regulation of individual insurance on coverage among adults without coverage either from an employer or a public program. These are as follow:
(4) INDIVist = f (IMARKETst, SOCIOECONist, STATE, YEAR),
where INDIV is private (non-employer) coverage; MARKET is a vector of variables that reflect individual (nongroup) market structure; and SOCIOECON, STATE and YEAR are defined as above.
(5) INDIVist = f (IMARKETAst, REGULATIONst, SOCIOECONist, STATE, YEAR),
where IMARKETA is a vector of variables that control for dimensions of individual market structure (HMO market share and average commercial insurer loss ratios) that were insensitive to regulation in our earlier results; and SOCIOECON, STATE and YEAR are defined as above.
(6) INDIVist = f (MARKETst, REGULATIONst, SOCIOECONist, STATE, YEAR),
where all vectors are as defined above.
We estimate all models using current-year measures of regulation, market structure and coverage.10 Descriptive statistics of all variables are provided in Appendix 2 and 3.