4Rodrik,D. (1989), "Imperfect Competition,Scale Economies and Trade Policy in Developing Countries",in R.E.Baldwin (ed.) .Trade policy Issues and Empirical Analysis (Chicago:University of Chicago Press).
5Krugman,p. , 1992, does the new trade theory require a new trade poliey?, the world eeonomy, 15:423--441.
6Brander,J. A. and B. J. Spencer. trade warfare: tariffs and cartels[J], journal of international economics 1984( 16)p227-242.
7Brander,J. A. and B. J. Spencer. Export subsidies and international market share rivalry[J].Journal of international Economics 1985(18)p83-100.
8Helpman and Krugman. trade policy and market structure[M].Cambridge: MIT press, 1989.
9Helpman,E. and P. Krugman(1985)"Market Structure and Foreign Trade", The MIT Press.
10Krugman,P. R. , 1990, Rethinking International Trade, The MIT Press.