7AKERLOF G. 1970. The market for"lemon": qualitative uncertainty and the market mechanism [ J]. Quarterly Journal of Economics, 84 (4) : 488 - 500.
8BA S , PAUL A. 2002. Evidence of the effect of trust building technology in electronic markets: price premi- ums and buyer behavior [ J]. MIS Quarterly, 26 (3) : 243 - 268.
9BAJARI P, HORTACSU A. 2003. The winner' s curse, reserve prices, and endogenous entry: empirical insights from eBay auctions [ J]. RAND Journal of Economics, 34:329 - 355.
10CHOI S Y,STAHL D O, WHINSTON A B. 1997. The eco- nomics of electronic commerce[ M ]. Indianapolis: Mac- millan Technical Publishing.