This paper describes forms of risk sharing between insurers and the regulator in a competitive individual health insurance market with imperfectly risk-adjusted capitation payments. Risk sharing implies a reduction of an insurer's incentives for selection as well as for efficiency. In a theoretical analysis, we show how the optimal extent of risk sharing may depend on the weights the regulator assigns to these effects. Some countries employ outlier or proportional risk sharing as a supplement to demographic capitation payments. Our empirical results strongly suggest that other forms of risk sharing yield better tradeoffs between selection and efficiency. Copyright

Efficiency, Health insurance, Risk sharing, Risk-adjusted capitation payments, Selection,
Journal of Health Economics
Erasmus School of Health Policy & Management (ESHPM)

van Barneveld, E.M, Lamers, L.M, van Vliet, R.C.J.A, & van de Ven, W.P.M.M. (2001). Risk sharing as a supplement to imperfect capitation: A tradeoff between selection and efficiency. Journal of Health Economics, 20(2), 147–168. doi:10.1016/S0167-6296(00)00077-1