2Foster, Lucia, John Haltiwanger, Chad Syverson. Reallocation, tirm turnover, and efficiency: selection on productivity or profitability? [ J ]. American Economic Review,2008,98 ( 1 ) : 394 - 425.
3Hsieh, Chang Tai, Klenow, Peter J.. Misallocation and manufacturing TFP in China and India [ J ]. Quarterly Journal of Economics, 2009,124(4) : 1403 - 1448.
4Aghion, P., Bloom, N., Blundell, R., Griffith, H. P.. Competition and innovation : an inverted u relationship [ J ]. Quartely Journal of Economics, 2005,20 ( 2 ) : 701 - 728.
5Paula Bustos. Trade liberalization, exports and technology upgrading:evidence on the impact of MERCOSUR on Argentinian Firms [ J]. American Economic Review,2011,101 ( 1 ) :304 - 340.
6Robert C. Johnson. Trade and prices with heterogeneous firms[ J]. Journal of International Economics,2012,86( 1 ) :43 - 56.
7Bratti, M. , Felice, G.. Are exporters more likely to introduce product innovations? [ EB/OL]. Centro Studi Lucad'Agliano Develop- ment Studies Working Paper,2011, (306).
8Mohieddine Rahmouni. Export behaviour and propensity to innovate in a developing country : The Case of Tunisia[ EB/OL]. http :// hal. archives-ouvertes, fr! working paper,2012 - 12 - 30.
9Bernard, AB, Jensen JB, Redding S J, Schott PK. Firms in international trade [ J ]. Journal of Economic Perspectives ,2007,21 (3) : 105 - 30.
10Rosenbaum, P. , Rubin, D.. Constructing a control group using multivariate matched sampling methods that incorporate the propen- sity score [ J ]. American Statistician, 1985,39 ( 1 ) :33 - 38.