00399nam a2200097Ia 450000500170000010000220001724500870003926000090012652001470013558300190028220260716043335.0  aBHAGWATI, Jagdish  aTheory of preferential trade agreements : historical evolution and current trends.  c1996  aTraces the two phases of evolution of the theory of preferential trade agreements, namely, the static effect and the dynamic line-path effect.  c3/7/00kM2LMGR