Effects of state reinsurance programs on health insurance exchange premiums and insurer participation

The aim of the study was to estimate the effect of the state-based reinsurance programs through the section 1332 State Innovation Waivers on health insurance marketplace premiums and insurer participation. 2015 to 2022 Robert Wood Johnson Foundation Health Insurance Exchange Compare Datasets. An event study difference-in-differences (DD) model separately for each year of implementation and a synthetic control method (SCM) are used to estimate year-by-year effects following program implementation. Not applicable. Reinsurance programs were associated with a decline in premiums in the first year of implementation by 10%-13%, 5%-19%, and 11%-17% for bronze, silver, and gold plans (p