This paper studies price competition between experts and discounters in a market for credence goods. While experts can identify a consumer's problem by exerting costly but unobservable diagnosis effort, discounters just sell treatments without giving any advice. The unobservability of diagnosis...

This paper studies the incentives for credence goods experts to invest effort in diagnosis if effort is both costly and unobservable, and if they face competition by discounters who are not able to perform a diagnosis. The unobservability of diagnosis effort and the credence characteristic of...