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HEV Choice Models as a Search Engine for the Specification of Nested Logit Tree Structures

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Abstract

This paper illustrates how the heteroskedastic extreme value (HEV) model can serve as an effective search engine for identifying appropriate tree structures in hierarchical choice models, particularly the nested logit. This use of the HEV model exploits its ability to estimate unique variances, and hence unique scale parameters, for each alternative in a choice set. The analysis of variance can reveal tree structures that may not be obvious to analysts who tend to base their search strategy on intuitive tree structures. The reliance on behavioural intuition may miss out on the identification of the 'best' tree in an econometric sense. This note illustrates how the HEV model is used to search for the hierarchical domain in which a statistically preferred nested logit model is positioned.

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Authors and Affiliations

  1. Institute of Transport Studies, The University of Sydney, NSW, 2006, Australia

    David A. Hensher

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  1. David A. Hensher
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Hensher, D.A. HEV Choice Models as a Search Engine for the Specification of Nested Logit Tree Structures. Marketing Letters 10, 333–343 (1999). https://doi.org/10.1023/A:1008151702729

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