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Credibility of propensity score matching estimates. An example from Fair Trade certification of coffee producers*

* This paper is a replication of an original study

Author

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  • Nicolas Lampach
  • Ulrich B. Morawetz

Abstract

Propensity score matching (PSM) is an increasingly popular method for evaluation studies in agricultural and development economics. However, statisticians and econometricians have stressed that results rely on untestable assumptions, and therefore, guidelines for researchers on how to improve credibility have been developed. We follow one of these guidelines with a data set analysed by other authors to evaluate the impact of Fair Trade certification on the income of coffee producers. We provide thereby a best practice example of how to evaluate the credibility of PSM estimates. We find that a thorough assessment of the assumptions made renders the data we use not suitable for a credible PSM estimation of the effects of treatment. We conclude that the debate about the impact of Fair Trade certification would greatly benefit from a detailed reporting of credibility checking.

Suggested Citation

  • Nicolas Lampach & Ulrich B. Morawetz, 2016. "Credibility of propensity score matching estimates. An example from Fair Trade certification of coffee producers," Applied Economics, Taylor & Francis Journals, vol. 48(44), pages 4227-4237, September.
    • Handle: RePEc:taf:applec:v:48:y:2016:i:44:p:4227-4237
    DOI: 10.1080/00036846.2016.1153795
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    Citations

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    Cited by:

    1. Akoyi, K.T. & Mitiku, F. & Maertens, M., 2018. "Is prohibiting child labour enough? Coffee certification and child schooling in Ethiopia and Uganda," 2018 Conference, July 28-August 2, 2018, Vancouver, British Columbia 275958, International Association of Agricultural Economists.
    2. Sirdey, Ninon & Lemeilleur, Sylvaine, 2021. "Can fair trade resolve the “hungry farmer paradox”?," Review of Agricultural, Food and Environmental Studies, Institut National de la Recherche Agronomique (INRA), vol. 102(1), March.
    3. Etchart, Nicolle & Freire, José Luis & Holland, Margaret B. & Jones, Kelly W. & Naughton-Treves, Lisa, 2020. "What happens when the money runs out? Forest outcomes and equity concerns following Ecuador’s suspension of conservation payments," World Development, Elsevier, vol. 136(C).
    4. Lampach, Nicolas & To-The, Nguyen & Nguyen-Anh, Tuan, 2021. "Technical efficiency and the adoption of multiple agricultural technologies in the mountainous areas of Northern Vietnam," Land Use Policy, Elsevier, vol. 103(C).
    5. Fikadu Mitiku & Yann De Mey & Jan Nyssen & Miet Maertens, 2017. "Do Private Sustainability Standards Contribute to Income Growth and Poverty Alleviation? A Comparison of Different Coffee Certification Schemes in Ethiopia," Sustainability, MDPI, vol. 9(2), pages 1-21, February.

    Replication

    This item is a replication of:
  • Pradyot Ranjan Jena & Bezawit Beyene Chichaibelu & Till Stellmacher & Ulrike Grote, 2012. "The impact of coffee certification on small-scale producers’ livelihoods: a case study from the Jimma Zone, Ethiopia," Agricultural Economics, International Association of Agricultural Economists, vol. 43(4), pages 429-440, July.

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    1. Credibility of propensity score matching estimates. An example from Fair Trade certification of coffee producers (AE 2016) in ReplicationWiki

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