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A Comment on "Estimating Dynamic Discrete Choice Models with Hyperbolic Discounting" by Hanming Fang and Yang Wang

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  • Jaap H. Abbring
  • {O}ystein Daljord

Abstract

The recent literature often cites Fang and Wang (2015) for analyzing the identification of time preferences in dynamic discrete choice under exclusion restrictions (e.g. Yao et al., 2012; Lee, 2013; Ching et al., 2013; Norets and Tang, 2014; Dub\'e et al., 2014; Gordon and Sun, 2015; Bajari et al., 2016; Chan, 2017; Gayle et al., 2018). Fang and Wang's Proposition 2 claims generic identification of a dynamic discrete choice model with hyperbolic discounting. This claim uses a definition of "generic" that does not preclude the possibility that a generically identified model is nowhere identified. To illustrate this point, we provide two simple examples of models that are generically identified in Fang and Wang's sense, but that are, respectively, everywhere and nowhere identified. We conclude that Proposition 2 is void: It has no implications for identification of the dynamic discrete choice model. We show that its proof is incorrect and incomplete and suggest alternative approaches to identification.

Suggested Citation

  • Jaap H. Abbring & {O}ystein Daljord, 2019. "A Comment on "Estimating Dynamic Discrete Choice Models with Hyperbolic Discounting" by Hanming Fang and Yang Wang," Papers 1905.07048, arXiv.org, revised Jul 2019.
  • Handle: RePEc:arx:papers:1905.07048
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    Cited by:

    1. Laura Blow & Martin Browning & Ian Crawford, 2021. "Non-parametric Analysis of Time-Inconsistent Preferences [Comment on `Estimating Dynamic Discrete Choice Models with Hyperbolic Discounting’ by Hanming Fang and Yang Wang]," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 88(6), pages 2687-2734.
    2. Melis Kartal & Jean-Robert Tyran, 2022. "Fake News, Voter Overconfidence, and the Quality of Democratic Choice," American Economic Review, American Economic Association, vol. 112(10), pages 3367-3397, October.
    3. Schiraldi, Pasquale & Levy, Matthew R., 2020. "Identification of intertemporal preferences in history-dependent dynamic discrete choice models," CEPR Discussion Papers 14447, C.E.P.R. Discussion Papers.

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