TY - SER AU - Dickstein, Michael J. AU - Ho, Kate AU - Mark, Nathaniel TI - Market Segmentation and Competition in Health Insurance SN - 0022-3808 PB - Journal of Political Economy KW - Health Care KW - Health Insurance KW - Households KW - Market Segmentation N2 - In the United States, households obtain health insurance through distinct market segments. To explore the economics of this segmentation, we consider the effects of pooling coverage provided through small employers and through individual marketplaces. We model households' demand for insurance and health care along with insurers' price setting to predict equilibrium choices and premiums. Applying our model to data from Oregon, we find that pooling can mitigate adverse selection in the individual market and benefit small group households without raising taxpayer costs. Our estimates provide insight into the effects of new regulations that allow employers to shift coverage to individual marketplaces UR - https://www.journals.uchicago.edu/doi/10.1086/725707 ER -