DP16318 Gravity and Heterogeneous Trade Cost Elasticities

Author(s): Natalie Chen, Dennis Novy
Publication Date: July 2021
Keyword(s): Currency Unions, euro, Gravity, Heterogeneity, RTA, Trade Costs, Trade Elasticity, translog, WTO
JEL(s): F14, F15, F33
Programme Areas: International Trade and Regional Economics
Link to this Page: cepr.org/active/publications/discussion_papers/dp.php?dpno=16318

How do trade costs affect international trade? This paper offers a new approach. We rely on a flexible gravity equation that predicts variable trade cost elasticities, both across and within country pairs. We apply this framework to popular trade cost variables such as currency unions, trade agreements, and WTO membership. While we estimate that these variables are associated with increased bilateral trade on average, we find substantial heterogeneity. Consistent with the predictions of our framework, trade cost effects are strong for 'thin' bilateral relationships characterised by small import shares, and weak or even zero for 'thick' relationships.