On the value of second opinions: A credence goods field experiment
通过电脑维修市场的自然田野实验，发现向卖家透露其他专家的第二意见既未提高维修成功率，也未降低平均维修价格。
Credence goods markets with their asymmetric information between buyers and sellers are prone to large inefficiencies. In theory, poorly informed consumers can protect themselves from maltreatment through sellers by gathering second opinions from other sellers. Yet, field experimental evidence whether this is a successful strategy is scarce. Here we present a natural field experiment in the market for computer repairs and show that revealing a second opinion from another expert does neither increase the rate of successful repairs nor decrease the average repair price charged by sellers.