1. Krugman ,P R· Increasing returns and economic geography [J]·Journal of Political Economy,1991(99): 483~499.

2.  Porter,M.E.（1990）"The Competitive Advantage of nations "

3.   Amiti，M．Location of Vertically Linked Industries：Agglomeration Versus Comparative Advantage[J]．European Economic Review，2005，

4，Krugman, P., 1998, “Space: the final frontier”, Journal of Economic Perspectives, 12, 161-174.

5，Krugman, P., 1991, “History and industry location: the case of the manufacturing belt”, American Economic Review, 81, 80-83.

6.Krugman, P., 1998, “Space: the final frontier”, Journal of Economic Perspectives, 12, 161-174.

   

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