regional integration agreements impact geography and efficiency fazia pusterla isla universitá l bocconi milan paper to be presented at the third cepii idb conference new regionalism progress setbacks challenges washington february 9 10 2006 first incomplete draft do not quote abstract in this gravity equation is used analyse on trade flows of different types rias special emphasis devoted test natural bloc hypothesis as well comparison degrees empirical analysis has shown that have a strong determining particularly effects intra are non contradictorily positive while evidence mixed influence member countries same time seems matter location continent emerges an important issue for creation there still some confusion belong other continents finally type ria expected contributes introducing heterogeneity results but it was possible confirm pattern according which higher lower intensity agreement
