TY - BOOK AU - Kerr,William R ED - National Bureau of Economic Research TI - Heterogeneous technology diffusion and Ricardian trade patterns T2 - NBER Working Paper PY - 2013/// CY - Cambridge PB - NBER KW - NBERWP 19657 KW - E10812.pdf UR - http://elibrary.igidr.ac.in/e-library/working papers/NBER/2013/E10812.pdf ER -