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Analyzing the continuity of attitudinal and perceptual indicators in hybrid choice models

Bahamonde Birke, Francisco Jose and Ortuzar, Juan de Dios (2017) Analyzing the continuity of attitudinal and perceptual indicators in hybrid choice models. Journal of Choice Modelling. Elsevier. doi: 10.1016/j.jocm.2017.01.003. ISSN 1755-5345.

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The main objective of this paper is to compare the consequences of treating the attitudinal and perceptual indicators of hybrid discrete choice (HDC) models as continuous or ordinal outcomes. Based on tradition and computational reasons, such indicators are still predominantly treated as continuous outcomes in practice. This usually neglects their nature (as respondents are normally asked to state their preferences, or level of agreement with a set of statements, using a discrete scale) and may induce bias. We conducted an analysis based on simulated data and real information (two case studies) and were able to find that the distribution of the indicators (especially when associated with non-uniformly spaced thresholds) may lead to a clear deterioration of the model’s overall predictive capacity, when assuming continuous indicators. This, however, does not translate to the goodness-of-fit of the discrete-choice component of the HDC model. Along the same line, a higher relative variability of the latent variables increases the differences between both approaches (ordinal and continuous outcomes), especially concerning the goodness-of-fit of the discrete-choice component of the model. It was not possible to identify a relation between the predictive capacity of both approaches and the amount of available information. Considering more indicators tend to reduce the gap between both approaches, but the effect is significantly smaller than the effect of the relative variability. Finally, two case studies using real data confirmed that no major differences, regarding the predictability of the discrete choices can be observed when the relative variability of the latent variables is low. Thus, we recommend analyzing this relative variability in order to decide on the suitability of the continuous assumption as a suitable alternative to the more onerous but correct ordinal treatment.

Item URL in elib:https://elib.dlr.de/110054/
Document Type:Article
Title:Analyzing the continuity of attitudinal and perceptual indicators in hybrid choice models
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Bahamonde Birke, Francisco JoseDLR / DIW-Berlin / Tu-BerlinUNSPECIFIEDUNSPECIFIED
Ortuzar, Juan de DiosPontificia Universidad Católica de ChileUNSPECIFIEDUNSPECIFIED
Journal or Publication Title:Journal of Choice Modelling
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:Latent Variables, Hybrid Discrete Choice Models, Attitudinal and Perceptual Indicators, Continuity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old), V - Urbane Mobilität (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Transport Research > Mobility and Urban Development
Deposited By: Bahamonde Birke, Francisco Jose
Deposited On:11 Jan 2017 09:52
Last Modified:06 Nov 2023 08:21

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