Gravity at Sixty: The Workhorse Model of Trade
CESifo, Munich, 2022
CESifo Working Paper No. 9584
On the eve of its 60th anniversary, the gravity model of trade is a ‘celebrity’, due to its intuitive appeal, solid theoretical foundations, and remarkable empirical success. Yet, many economists still view gravity simply as an intuitive but naive reduced-form estimating equation and apply it without guidance from theory, while others are skeptical about its usefulness for counterfactual projections. The objective of this paper is to offer a historical overview of its evolution from an a-theoretical application to an estimating computable general equilibrium (E-CGE) model, which can be nested in more complex frameworks. Along the way, I address some misconceptions about the gravity model, summarize the current best practices for gravity estimations, and highlight some properties that have made gravity so successful.
Trade Policy
Empirical and Theoretical Methods