3Baier, S. L. , Bergstrand, J. H. Do Free Trade Agreement Actually Increase Members' International Trade. Journal of International Economics,2007,71.
4Balassa, B, Trade Liberalization and Revealed Comparative Advantage. The Manchester School, 1965.
5Brown, A. J. Applied of Economics : Aspects of World Economy in War and Peace. London: George Allen and Unwin, 1949.
6Frankel, J. , Stein, E. ,Wei, S. Trading Blocs and the Americas: The Natural,the Unnatural, and the Super-natural. Journal of Development Economics, 1995,47.
7Grossman, G. M. , Helpman, E. The Politics of Free-Trade Agreements. American Economic Review, 1995,85 ( 4 ).
8Kruger, A. O. Are Preferential Trading Arrangements Tradeliberalizing or Protectionist. Journal of Economic Perspectives, 1999,13.
9Kojima, K. The Pattern of International Trade among Advanced Countries. Hitotsubashi Journal of Economics, 1964 ( 1 ) : 16 -36.
10Lawrence, R. Z. Comment on "The Role of History in Bilateral Trade Flows". The Regionalization of the World Economy, Chicago: The University of Chicago Press, 1998.
