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The log of gravity

Silva, J.M.C. Santos and Tenreyro, Silvana ORCID: 0000-0002-9816-7452 (2006) The log of gravity. Review of Economics and Statistics, 88 (4). 641 - 658. ISSN 0034-6535

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Identification Number: 10.1162/rest.88.4.641


Although economists have long been aware of Jensen's inequality, many econometric applications have neglected an important implication of it: under heteroskedasticity, the parameters of log-linearized models estimated by OLS lead to biased estimates of the true elasticities. We explain why this problem arises and propose an appropriate estimator. Our criticism of conventional practices and the proposed solution extend to a broad range of applications where log-linearized equations are estimated. We develop the argument using one particular illustration, the gravity equation for trade. We find significant differences between estimates obtained with the proposed estimator and those obtained with the traditional method.

Item Type: Article
Official URL:
Additional Information: © 2006 by the President and Fellows of Harvard College and the Massachusetts Institute of Technology
Divisions: Centre for Economic Performance
Subjects: H Social Sciences > HB Economic Theory
Date Deposited: 27 Jun 2007
Last Modified: 03 Mar 2024 17:48

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