Cheap talk, fraud, and adverse selection in financial markets: some experimental evidence

We examine communication in laboratory games with asymmetricinformation. Sellers know true asset qualities. Potential buyersonly know the quality distribution. Prohibiting communication,we document the degree of adverse selection. Then we examinetwo alternative communication mechanisms. Under 'cheap talk',each seller can announce any subset of qualities. Under 'antifraud',the subset must include the true quality. Both mechanisms improvemarket efficiency, but very differently. Relying on sellers'frequently exaggerated claims, buyers often overpay under cheaptalk. Efficiency gains come at the buyer's expense. The antifraudrule improves efficiency further and eliminates the wealth transferfrom buyers to sellers.