This short paper shows that in an affiliated value setting one more bidder at the auction stage need not induce a higher expected welfare in either ascending price or second price auctions. We highlight the roles of asymmetries between bidders and of the multidimensional character of the private...

In a laboratory experiment designed to capture key aspects of the interaction between physicians and patients, we study the effects of medical insurance and competition in the guise of free choice of physician, including observability of physicians' market shares. Medical treatment is an example...

In a laboratory experiment designed to capture key aspects of the interaction between physicians and patients in a stylized way, we study the effects of medical insurance and competition in the guise of free choice of physician. Medical treatment is an example of a credence good: only the...