With credence goods consumers cannot judge actual quality neither before purchase - ex ante - nor after purchase - ex post -. Trust has to replace own examination and verification. Applying Choquet-Expected Utility theory, a general model of credence goods is developed which takes the problem of...

Summary This article reviews the basic theoretical model of risk adjustment (Glazer/McGuire 2000) with a special focus on a coherent presentation of the main results. With adverse selection a regulator pursuing efficiency and solidarity objectives will need a risk adjustment scheme acting on a...