The Economics of Credence Goods: On the Role of Liability, Verifiability, Reputation and Competition
Posted: 6 Mar 2009
Date Written: February 2009
Credence goods markets are characterized by asymmetric information between sellers and consumers that may give rise to inefficiencies, such as under- and overtreatment or market break-down. We study in a large experiment with 936 participants the determinants for efficiency in credence goods markets. While theory predicts that either liability or verifiability yields efficiency, we find that liability has a crucial, but verifiability only a minor effect. Allowing sellers to build up reputation has little influence, as predicted. Seller competition drives down prices and yields maximal trade, but does not lead to higher efficiency as long as liability is violated.
Keywords: Credence goods, Experiment, Liability, Verifiability, Reputation, Competition
JEL Classification: C72, C91, D40, D82
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