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Elasticity Optimism

Author

Listed:
  • Jean Imbs

    (PSE - Paris School of Economics, CES - Centre d'économie de la Sorbonne - UP1 - Université Panthéon-Sorbonne - CNRS - Centre National de la Recherche Scientifique)

  • Isabelle Mejean

    () (X - École polytechnique)

Abstract

On average, estimates of trade elasticities are smaller in aggregate data than at sector level. This is an artifact of aggregation. Estimations performed on aggregate data constrain sector elasticities to homogeneity, which creates a heterogeneity bias. The paper shows such a bias exists in two prominent approaches used to estimate elasticities, which has meaningful consequences for the calibration of the trade elasticity in one-sector, aggregative models. With elasticities calibrated to aggregate data, macroeconomic models can have predictions at odds with the implications of their multi-sector counterparts. They do not when elasticities are calibrated using a weighted average of sector elasticities.

Suggested Citation

  • Jean Imbs & Isabelle Mejean, 2015. "Elasticity Optimism," PSE - Labex "OSE-Ouvrir la Science Economique" hal-01301577, HAL.
  • Handle: RePEc:hal:pseose:hal-01301577
    DOI: 10.1257/mac.7.3.43
    Note: View the original document on HAL open archive server: https://hal.archives-ouvertes.fr/hal-01301577
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    References listed on IDEAS

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    More about this item

    Keywords

    Estimation; Heterogeneity; Homogeneity; Trade;

    JEL classification:

    • F21 - International Economics - - International Factor Movements and International Business - - - International Investment; Long-Term Capital Movements
    • F32 - International Economics - - International Finance - - - Current Account Adjustment; Short-term Capital Movements
    • F41 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - Open Economy Macroeconomics

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