A Quantification of the Evolution of Bilateral Trade Flows Once Bilateral RTAs are Implemented

In this paper we study how 103 bilateral Regional Trade Agreements (RTAs) shape bilateral trade flows over time. The analysis of quarterly trade flows from 1982 Q4 to 2018 Q4 shows dynamic differences between RTAs and among trading partners. Results show that countries benefit unevenly from bilateral RTAs. The positive global trade trend since the 1990s and the negative effect of the 2008 economic crisis are captured by a factor analysis that allows us to study specifically how trade agreements affect bilateral trade asymmetrically. On average, RTAs lead to a 10% increase in bilateral trade flows above the mean trend, but disparities are found since Partial Scope Agreements (PSAs) tend to boost bilateral trade more than Free Trade Agreements (FTAs) (21% compared to 9%). However, most of the effects of PSAs occur during the first four quarters after the agreements come into force, whereas FTAs have effects over a longer period. The current study uses cluster analysis to classify bilateral trade flows into homogeneous groups according to the dynamic impact that RTAs have on them. This allows the heterogeneity between clusters to be explored. Moreover, the results show a difference relating to the economic crisis starting in 2008: in general, the impact on bilateral trade of agreements in force before 2008 is positive (30%), while it is negative for agreements signed after 2008 (-9%). This indicates that RTAs play a heterogeneous role as a cycle smoothing mechanism. Finally, there is evidence of an anticipation effect: we find that for more than half of the bilateral trade flows studied, the effect of the bilateral RTA is detected before it comes into force