Choice set generation within the generalized extreme value family of discrete choice models

This paper introduces a new member of the generalized extreme value (GEV) f amily of discrete choice models that directly incorporates choice set gener ation modeling into the specification via the GEV generating function. Thou gh still a two-stage model of choice set generation and choice, the propose d model specifies choice set generation endogenously and directly reflectiv e of preferences, which further differentiates it from extant models of cho ice set formation. The properties of the model, denominated GenL (choice se t Generation Logit), are examined in detail. A case study involving interci ty mode choice by nonbusiness travelers is presented to illustrate model es timation and interpretation, as well as to obtain insights into possible da ta generation process characteristics that lead to violation of GEV conditi ons for the model. (C) 2001 Elsevier Science Ltd. All rights reserved.