1,721,115 research outputs found
Mode choice models with attribute cutoffs analysis: the case of freight transport in the Marche region
Full text linkThis paper shows that, when modelling freight demand, taking into consideration the presence of attribute cutoffs is important and has relevant repercussions on the estimates of service attributes coefficients. In this paper we focus on mode choice models for freight transport demand in the Marche region in Italy. Specific reference is paid to furniture and metallurgic productive sectors given their relevance for the region and their potential vocation for intermodal transport. Preference elicitation is done using choice based conjoint analysis. The study shows that there is a structural difference among the two sectors and that they have heterogeneous preferences
Bayesian Flexible Modelling of Mixed Logit Models
No full textThe widespread use of the Mixed Multinomial Logit model, in the context of discrete choice data, has made the issue of choosing a mixing distribution very important. The choice of a specific distribution may seriously bias results if that distribution is not suitable for the data. We propose a flexible hierarchical Bayesian approach in which the mixing distribution is approximated through a mixture of normal distributions. Numerical results on a real data set are provided to demonstrate the usefulness of the proposed method
Quality and Public Transport Service Contracts
Full text linkService contracts are the natural method to set bilateral commitments. In transport service context,
public authorities and transport operators have different goals, therefore regulation plays an important
role especially failing competition. After a brief description of the most important regulatory procedures,
we focus our attention on the quality framework in service contracts. In recent years the inclusion of
quality requirements in contracts is becoming common practice, especially when adopting price cap
regulation. This paper suggests a criterion for service quality definition, measurement and integration in
contracts for the production of socially valuable transport services. Using choice-based conjoint analysis
to analyse customer preferences we estimate the passengers’ evaluation of different service features and
calculate a robust specification of a service quality index from the customers’ point of view. A case study
demonstrates the procedure to follow for measuring service quality in local public transport differentiated
by geographical service segments
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