A consumer wants to buy one of three different products. An expert observes which of the three products is the best match for the consumer. Under linear prices a monopolistic expert may truthfully reveal, may partially reveal, and may not reveal at all her information. The outcome is...

This article is about a market for credence goods. With a credence good, consumers are never sure about the extent of the good they actually need. Therefore, sellers act as experts determining the customers' requirements. This information asymmetry between buyers and sellers obviously creates...