4Acs Zoltan J.,and Audretsch David B.Small-firm Entry in US Manufacturing[J].Economica,1989,(6).
5Broadman H.G.Reducing Structural Dominance and Entry Barriers in Russian Industry[R].The World Bank Europe and Central Asia Regional Office Working Paper,2000,(2330).
6Copeland A.,and Hall G.The Responses of Prices,Sales,and Output to Temporary Changes[R].NBER Working Paper Series,2005,(11870).
7Domowitz.Business Cycles and the Relationship between Concentration and Price-cost Margins[J].Rand Journal of Economics,1986,(1).
8Dunne T.,Robert M.J.Patterns of Firm Entry and Exit in U.S.Manufacturing Industries[J].Rand Journal of Economics.1988,(4).
9Dutta A.Measuring Policy Barriers in the American Steel Industry:1950-1998[D].University of Illinois,2004.
10Geroski Paul A.The Effect of Entry on Profit Margins in the Short and Long Run[J].Annals of Economics and Statistics,1989,(15).