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Session Effects in the Laboratory

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  • Guillaume R. Fréchette

Abstract

In experimental economics, where subjects participate in different sessions, observations across subjects of a given session might exhibit more correlation than observations across subjects in different sessions. The problem of session effects is related to similar problems in many experimental and non-experimental fields. This paper attempts to clarify what the issues are and proposes a set of practical tests to identify the problem as well as ways to test for treatment effects in the presence of session-effects. Simulations are used to assess how these tests perform given the relatively small samples typical of experimental data sets. En économie expérimentale où les sujets participent à différentes sessions, les observations peuvent être plus corrélées à l'intérieur d'une même session qu'entre les participants ayant participé à différentes sessions. Ce type d'effet est présent également dans plusieurs autres domaines, autant expérimentaux que non-expérimentaux. Cette étude tente de mettre en lumière quelles sont les sources du problème et propose un ensemble de tests pour déterminer s'il y a ou non présence de corrélation intra-session dans une collecte de données, et pour identifier l'effet d'un traitement lorsque ce problème est présent. Des simulations ont été effectuées pour évaluer la performance de ces tests sur des échantillons avec peu d'observations, ce qui est commun lors de la collecte de données de type expérimental.

Suggested Citation

  • Guillaume R. Fréchette, 2006. "Session Effects in the Laboratory," CIRANO Working Papers 2006s-21, CIRANO.
  • Handle: RePEc:cir:cirwor:2006s-21
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    File URL: http://www.cirano.qc.ca/files/publications/2006s-21.pdf
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    Cited by:

    1. Gary Bolton & Axel Ockenfels & Peter Werner, 2016. "Leveraging social relationships and transparency in the insider game," Journal of the Economic Science Association, Springer;Economic Science Association, vol. 2(2), pages 127-143, November.
    2. Le Zhang & Andreas Ortmann, 2012. "On the Interpretation of Giving, Taking, and Destruction in Dictator Games and Joy-of-Destruction Games," Discussion Papers 2012-50, School of Economics, The University of New South Wales.
    3. Hu, Youxin & Kagel, John & Xu, Xiaoshu & Ye, Lixin, 2013. "Theoretical and experimental analysis of auctions with negative externalities," Games and Economic Behavior, Elsevier, vol. 82(C), pages 269-291.
    4. Matthew Embrey & Kyle Hyndman & Arno Riedl, 2014. "Bargaining with a Residual Claimant: An Experimental Study," CESifo Working Paper Series 5087, CESifo Group Munich.
    5. Jade Wong & Andreas Ortman & Alberto Motta & Le Zhang, 2013. "Understanding Social Impact Bonds and Their Alternatives: An Experimental Investigation," Discussion Papers 2013-21, School of Economics, The University of New South Wales.
    6. Caleb A. Cox & Brock Stoddard, 2015. "Framing and Feedback in Social Dilemmas with Partners and Strangers," Games, MDPI, Open Access Journal, vol. 6(4), pages 1-19, September.
    7. Bonroy, Olivier & Garapin, Alexis & Hamilton, Stephen F. & Souza Monteiro, Diogo M., 2015. "Mislabelling in Collective Labels: an experimental analysis," 2015 AAEA & WAEA Joint Annual Meeting, July 26-28, San Francisco, California 205482, Agricultural and Applied Economics Association;Western Agricultural Economics Association.

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    Keywords

    experimental economics; session effects; économie expérimentale; corrélation intra-session;

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