1Wolinsky Price as Signals of Product Quality Review of Economic Studies 50 (1983) :647-658.
2Spence Monopoly, Quality and Regulation Bell Journal of Economics.6(1975) :417-429.
3Smallwood D. and J.Conlisk. Product Quality in Markets whereConsumers are Imperfectly Informed Quarterly Journal of Economics(1979) 93:1-23.
4Milgrom,P.,and.J.Roberts. Prices and Advertising Signals of Product Quality Journal of Political Economy(1986) 94:796-821.
5Walliamson Verticallntegration of Production Market Failure Consideration.America Economic Review 1971-5.112-1231.
6Akeflof "the Market for 'lemons': Qualitative Uncertainty and the Market Mechanism" Quarterly Journal of Economies 84:488-500 Russell Cooper ," Price, Product Quality and Asymmetric Information:The Competitive Case" Review of Economic Studies (1984) LI, 197-207.
7Shapiro.C ," Premiums for High Quality Products as Rents to Reputation"Quarterly .loumal of Economics (1983)98:659-680.
