Publicado

2014-09-01

Classic and bayesian estimation of Subjective Value of Time

Estimación clásica y bayesiana del Valor Subjetivo del Tiempo

DOI:

https://doi.org/10.15446/dyna.v81n187.40863

Palabras clave:

Mixed logit models, Bayesian models, subjective value of time (en)
Modelos logit mixto, Estimación bayesiana, Valor subjetivo del tiempo (es)

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Autores/as

  • Margareth Gutiérrez-Torres Universidad de la Costa
  • Victor Cantillo-Maza Universidad del Norte
In this paper, we estimate different travel time components in an urban transport context in Bogotá, by using discrete choice models. For the analysis, we evaluate two different approaches for model estimation: the maximum likelihood estimation (classical) and the Bayesian estimation, allowing a comparison between both approaches when are used to estimate the subjective value of time (SVT) as the marginal rate of substitution between time and cost. We found that the average SVT when we used the classical estimation is US$0.14/min; meanwhile, the access time was US$0.21/min and the penalty for a transfer is US$0.74. On the other hand, the average values estimated when using Bayesian approach were US$0.15/min for the SVT in vehicle, US$0.21/min for the access time and US$0.83 for the transfer penalty.
En este artículo, se realizan estimaciones del valor de las distintas componentes del tiempo de viaje en el contexto del transporte urbano en Bogotá utilizando modelos de elección discreta. En el análisis, se evalúan dos enfoques: estimación por máxima verosimilitud y técnicas bayesianas, permitiendo una comparación en la estimación del valor subjetivo del tiempo (VST) como la tasa marginal de sustitución entre el tiempo y el costo. Se encontró que el VST del tiempo de viaje para la estimación clásica fue en promedio de US$0,14/min, del tiempo de acceso de US$0,21/min y por último la penalidad por transbordo del orden de US$0,74. Por otro lado, los valores promedio estimados con la modelación Bayesiana son de US$0,15/min para el tiempo de viaje, el tiempo de acceso US$0,21/min y de US$0,83 la penalidad por el transbordo.

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