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Gravity Estimation of the Intensive and Extensive Margins of Trade: An Alternative Procedure with Alternative Data

Author

Listed:
  • Harry Flam
  • Hakan Nordström

Abstract

Helpman, Melitz and Rubinstein (2008) derive gravity equations to estimate effects of trade barriers on the intensive and extensive margins of trade. They exploit the frequency of zeros in aggregate bilateral trade data to identify effects on the extensive margin and to obtain controls for firm level heterogeneity and sample selection on the intensive margin. By using data on the number of bilaterally traded products we improve on identification and allow estimation of the extensive margin when data contain only positive trade flows. We also control for the pervasive presence of heteroscedasticity in trade data. The heterogeneity and selection biases are shown to be small and unimportant whereas the heteroscedasticity bias is large and important.

Suggested Citation

  • Harry Flam & Hakan Nordström, 2011. "Gravity Estimation of the Intensive and Extensive Margins of Trade: An Alternative Procedure with Alternative Data," CESifo Working Paper Series 3387, CESifo Group Munich.
  • Handle: RePEc:ces:ceswps:_3387
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    File URL: http://www.cesifo-group.de/DocDL/cesifo1_wp3387.pdf
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    References listed on IDEAS

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    1. J. M. C. Santos Silva & Silvana Tenreyro, 2006. "The Log of Gravity," The Review of Economics and Statistics, MIT Press, vol. 88(4), pages 641-658, November.
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    Cited by:

    1. Egger, Peter H. & Nigai, Sergey, 2015. "Structural gravity with dummies only: Constrained ANOVA-type estimation of gravity models," Journal of International Economics, Elsevier, vol. 97(1), pages 86-99.
    2. Xian-Liang Tian, 2017. "Estimating sectoral product quality under quality heterogeneity," Review of World Economics (Weltwirtschaftliches Archiv), Springer;Institut für Weltwirtschaft (Kiel Institute for the World Economy), vol. 153(1), pages 137-176, February.
    3. Salvador Gil-Pareja & Rafael Llorca-Vivero & José Martínez-Serrano, 2015. "The Uneven Impact of Continental Boundaries on Trade," Open Economies Review, Springer, vol. 26(2), pages 237-257, April.
    4. Farrukh Suvankulov, 2015. "Revisiting National Border Effects in Foreign Trade in Goods of Canadian Provinces," Staff Working Papers 15-28, Bank of Canada.
    5. Kareem, Fatima Olanike & Martinez-Zarzoso, Inmaculada & Brümmer, Bernhard, 2016. "Fitting the Gravity Model when Zero Trade Flows are Frequent: a Comparison of Estimation Techniques using Africa's Trade Data," Discussion Papers 230588, Georg-August-Universitaet Goettingen, GlobalFood, Department of Agricultural Economics and Rural Development.
    6. Egger, Peter & Nigai, Sergey, 2015. "Structural Gravity with Dummies Only," CEPR Discussion Papers 10427, C.E.P.R. Discussion Papers.
    7. Olayinka Idowu Kareem, 2014. "The European Union Sanitary and Phytosanitary Measures and Africa’s Exports," RSCAS Working Papers 2014/98, European University Institute.

    More about this item

    Keywords

    gravity estimation; heteroscedasticity in data; intensive and extensive margin;

    JEL classification:

    • F10 - International Economics - - Trade - - - General
    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • F14 - International Economics - - Trade - - - Empirical Studies of Trade

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