00370nam a2200085Ia 4500100002200000245008700022260000900109520014700118583001900265  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