Analysis on Efficiency of Middlemen in Information Asymmetrical Market
研究了技术市场中信息不对称导致的逆向选择问题，证明在一定条件下中间商的参与能提高交易效率和社会福利。
Asymmetrical information in technology market causes adverse-selection. The serious adverse-selection will decease the trade efficiency. We prove that under certain constraints,the partici-pancy of middlemen can increase the trade efficiency and the social welfare.