8Sturgeon,T. and G. Gerefl]. Measuring Success in the Global Econo- my: International Trade, Industrial Upgrading, and Business Func- tion Outsourcing in Global Value Chains [ J ]. Transnational Corpora- tion ,2009, ( 2 ) : 113-134.
9Roberts,Mark J. and James R. Tybout. The Decision to Export in Colombia: An Empirical Model of Entry with Sunk Costs[J]. A- merican Economic Review, 1997, (4) : 545-643.
