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A practical routine to harmonize product classifications over time

Author

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  • Nicole Bellert
  • Dario Fauceglia

Abstract

The aim of this paper is to present a new routine that produces consistent industrial or product classifications over time. Our routine is useful for empirical researchers since many classification systems such as the Harmonized System (HS) are regularly subject to revisions. The application of our routine is likely to improve the reliability of studies about product survival, churning or scope in export markets and increase the efficiency of “within estimators”. The code that is implemented as a Stata command can be easily adapted to other programming (such as R) or data environments. Our routine based on an object-oriented Java program is less prone to coding errors than existing alternative algorithms that rely on long functional procedures instead.

Suggested Citation

  • Nicole Bellert & Dario Fauceglia, 2019. "A practical routine to harmonize product classifications over time," International Economics, CEPII research center, issue 160, pages 84-89.
    • Handle: RePEc:cii:cepiie:2019-q4-160-8
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    Cited by:

    1. Kemal Türkcan & Socrates Majune Kraido & Eliud Moyi, 2022. "Export margins and survival: A firm‐level analysis using Kenyan data," South African Journal of Economics, Economic Society of South Africa, vol. 90(2), pages 149-174, June.
    2. Baumgartner Christoph & Walde Janette & Srhoj Stjepan, 2023. "Harmonization of Product Classifications: A Consistent Time Series of Economic Trade Activities," Journal of Economics and Statistics (Jahrbuecher fuer Nationaloekonomie und Statistik), De Gruyter, vol. 243(6), pages 643-662, December.
    3. Lukaszuk, Piotr & Torun, David, 2022. "Harmonizing the Harmonized System," Economics Working Paper Series 2212, University of St. Gallen, School of Economics and Political Science.

    More about this item

    Keywords

    Concordance; Product classification system; Export duration; Survival; Algorithm;
    All these keywords.

    JEL classification:

    • F14 - International Economics - - Trade - - - Empirical Studies of Trade
    • C81 - Mathematical and Quantitative Methods - - Data Collection and Data Estimation Methodology; Computer Programs - - - Methodology for Collecting, Estimating, and Organizing Microeconomic Data; Data Access

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