In this article, we show that common insurance policy provisions—namely, deductibles, coinsurance, and maximum limits—can arise as a result of adverse selection in a competitive insurance market. Research on adverse selection typically builds on the assumption that different risk types...

Under Yaari's dual theory of risk, we determine the equilibrium separating contracts for high and low risks in a competitive insurance market, in which risks are defined only by their expected losses, that is, a high risk is a risk that has a greater expected loss than a low risk. Also, we...