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External and Internal Consistency of Choices made in Convex Time Budgets

Author

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  • Calford, Evan
  • Chakraborty, Anujit
  • Fenig, Guidon
  • Halevy, Yoram

Abstract

We evaluate data on choices made from Convex Time Budgets (CTB) in Andreoni and Sprenger (2012a) and Augenblick et al. (2015), two influential studies that proposed and applied this experimental technique. We use the Weak Axiom of Revealed Preference (WARP) to test for external consistency relative to pairwise choice, and demand, wealth and impatience monotonicity to test for internal consistency. We find that choices made by subjects in the original Andreoni and Sprenger (2012a) paper violate WARP frequently; violations of all three internal measures of monotonicity are concentrated in subjects who take advantage of the novel feature of CTB by making interior choices. Wealth monotonicity violations are more prevalent and pronounced than either demand or impatience monotonicity violations. We substantiate the importance of our desiderata of choice consistency in examining effort allocation choices made in Augenblick et al. (2015), where we find considerably more demand monotonicity violations, as well as many classical monotonicty violations which are associated with time inconsistent behavior. We believe that the frequency and magnitude of WARP and monotonicity violations found in the two studies pose important confounds for interpreting and structurally estimating choice patterns elicited through CTB. We encourage researchers employing CTB in present and future experiments to include consistency tests in their design and pre-estimation analysis.

Suggested Citation

  • Calford, Evan & Chakraborty, Anujit & Fenig, Guidon & Halevy, Yoram, 2014. "External and Internal Consistency of Choices made in Convex Time Budgets," Microeconomics.ca working papers yoram_halevy-2014-37, Vancouver School of Economics, revised 09 Jan 2017.
  • Handle: RePEc:ubc:pmicro:yoram_halevy-2014-37
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    References listed on IDEAS

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    Cited by:

    1. Xavier Gabaix & David Laibson, 2017. "Myopia and Discounting," NBER Working Papers 23254, National Bureau of Economic Research, Inc.
    2. Janssens, Wendy & Kramer, Berber & Swart, Lisette, 2017. "Be patient when measuring hyperbolic discounting: Stationarity, time consistency and time invariance in a field experiment," Journal of Development Economics, Elsevier, vol. 126(C), pages 77-90.
    3. Meyer, Andrew G., 2015. "The impacts of elicitation mechanism and reward size on estimated rates of time preference," Journal of Behavioral and Experimental Economics (formerly The Journal of Socio-Economics), Elsevier, vol. 58(C), pages 132-148.

    More about this item

    Keywords

    design of experiments;

    JEL classification:

    • C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
    • D90 - Microeconomics - - Micro-Based Behavioral Economics - - - General

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