RTAs' Proliferation and Trade‐diversion Effects: Evidence of the ‘Spaghetti Bowl’ Phenomenon

This paper investigates the trade‐diversion effects of regional trade agreements (RTAs), so‐called spaghetti bowl phenomenon (SBP), in multilateral trade. The SBP is due to the proliferation of RTAs. Thus, I investigate the relationship between the number of RTAs concluded by a country and the additional trade value attributed to a RTA. Using bilateral trade data in a sample of 119 countries, from 1995 to 2012, my main finding reveals a negative trade effect between them, confirming the existence of SBP in multilateral trade. However, results could not conclude the evidence of a negative effect of overlapping RTAs, involving the existence of SBP, within North–North, North–South or South–South trade. But, the additional trade value attributed to a RTA concluded with EU countries or US seems to confirm significantly a trade‐diversion effect because of the number of RTAs signed by these countries.