1Lawless, M.( 2009 ), "Firm export dynamics and the geography of trade", Journal of International Economics, Vol. 77.
2Helpman, E., Melitz, M. and Rubenstein, Y. ( 2008 ), "Estimating Trade Flows: Trading Partners and Trading Volumes", Quarterly Journal of Economics, Vol. CXXIII ( 2 ).
3David Greenaway, Jakim Gullstrand, Richard Kneller.(2009), "Firm Heterogeneity and the Geography of International Trade", Agritbod economics centre working paper 2009.
4Atkeson, A., Burstein, A.(2006), "Innovation, firm dynamics, and internationaltrade", UCLA, mimeo.
5Ngo Van Long, Horst Raft, Frank St?hler.(2009), "Innovation and Trade with Heterogeneous Firms", CESifo working paper No.2796.
6Do, Q.-T. and Levchenko, A.A. (2(}(}9), "Trade, inequality, and the politicaleconomy of institutions", Journal of Economic Theory.
7Jennifer Abel-Koch.(2010), "Endogenous Trade Policy with Heteroge neous Firms", Job market paper 678.
8Erzo G.J. Luttmer.( 2010 ), "Models of Growth and Firm Heterogeneity", Federal Reserve Bank of Minneapolis Research Department working paper 678.