1
题目：Internal Versus External Market Conditions and Firm Profitability: An Exploratory Model
作者：Ioannis N. Kessides
期刊：The Economic Journal, Vol. 100, No. 402 (Sep., 1990), pp. 773-792
链接http://www.jstor.org/pss/2233658

2
题目：The determinants of entry and exit reconsidered
作者：D.Shapiro
期刊：International Journal of Industrial Organization, Volume 5, Issue 1, Pages 15-26
链接：http://linkinghub.elsevier.com/retrieve/pii/0167718787900038


请设出售，呵呵，谢谢啦！