Cheng, Wen LiSachs, Jeffrey D.Yang, Xiaokai2019-04-181999-04Cheng, Wen Li, Jeffrey D. Sachs, and Xiaokai Yang. “An Inframarginal Analysis of the Heckscher-Olin Model with Transaction Costs and Technological Comparative Advantage.” CID Working Paper Series 1999.09, Harvard University, Cambridge, MA, March 1999.http://nrs.harvard.edu/urn-3:HUL.InstRepos:39298313In the paper we introduce technological comparative advantage and transaction costs into the Heckscher-Olin (HO) model and refine the HO theorem, the Stolper-Samuelson theorem, the Rybczynski theorem, and factor equalization theorem. The refined core theorems can be used to accommodate recent empirical evidence that is at odds with the core theorems.en-USResearch Paper or Report2019-04-18