Structural Gravity Equations with Intensive and Extensive Margins
Recent trade models with heterogenous firms have considerable consequences on the interpretation of gravity equations. Chaney (2008) shows that the effect of distance on trade margins incorporates three parameters: the elasticity of substitution between goods, the elasticity of trade costs with respect to distance, and the degree of firm heterogeneity. We structurally estimate the parameters of trade flows in Chaney’s model using French firm-level export data for 1986-1992, and controlling for the fixed costs of exporting. Our estimated parameters are consistent, for 27 out of 34 industries, with the theoretical model. They also allow us to evaluate the effects of transport cost separately from the effects of tarifs, without having to resort to detailed data on trade frictions.
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- Pierre-Philippe Combes & Miren Lafourcade, 2005. "Transport costs: measures, determinants, and regional policy implications for France," Journal of Economic Geography, Oxford University Press, vol. 5(3), pages 319-349, June.
- Hélène Erkel-Rousse & Daniel Mirza, 2002.
"Import price elasticities: reconsidering the evidence,"
Canadian Journal of Economics,
Canadian Economics Association, vol. 35(2), pages 282-306, May.
- Erkel-Rousse, H. & Mirza, D., 2000. "Import Price-Elasticities : Reconsidering the Evidence," Papiers d'Economie MathÃ©matique et Applications 2000.52, UniversitÃ© PanthÃ©on-Sorbonne (Paris 1).
- Helene Erkel-Rousse & Daniel Mirza, 2000. "Import Price-Elastcities: Reconsidering the Evidence," Econometric Society World Congress 2000 Contributed Papers 0909, Econometric Society.
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