Credit, Default, and Optimal Health Insurance

How do defaults and bankruptcies affect optimal health insurance policy? I answer this question using a life-cycle model of health investment with the option to default on emergency room (ER) bills and financial debts. I calibrate the model for the U.S. economy and compare the optimal health insurance in the baseline economy with that in an economy with no option to default. With no option to default, the optimal health insurance is similar to the health insurance system in the baseline economy. In contrast, with the option to default, the optimal health insurance system (i) expands the eligibility of Medicaid to 22 percent of the working-age population, (ii) replaces 72 percent of employer-based health insurance with a private individual health insurance plus a progressive subsidy, and (iii) reforms the private individual health insurance market by improving coverage rates and preventing price discrimination against people with pre-existing conditions. This result implies that with the option to default, households rely on bankruptcies and defaults on ER bills as implicit health insurance. More redistributive healthcare reforms can improve welfare by reducing the dependence on this implicit health insurance and changing households’ medical spending behavior to be more preventative.