caa a22 4500 467928703 CHVBK 20180406152937.0 cr unu---uuuuu 170328e20060601xx s 000 0 eng 10.1007/s11067-006-7694-3 doi (NATIONALLICENCE)springer-10.1007/s11067-006-7694-3 Confidence Interval for Willingness to Pay Measures in Mode Choice Models [Elektronische Daten] [Raquel Espino, Juan de Dios Ortúzar, Concepción Román] We obtain confidence intervals for willingness-to-pay (WTP) measures derived from a mode choice model estimated to analyse travel demand for suburban trips in the two main interurban corridors in Gran Canaria using a mixed RP/SP data base. We considered a specification of the systematic utility that incorporates income effect, and interactions among socioeconomic variables and level-of-service attributes, as well as between travel cost and frequency. As our model provides rather complex expressions of the marginal utilities, we simulated the distribution of the WTP (in general, unknown) from a multivariate Normal distribution of the parameter vector. For every random draw of the parameter vector, the corresponding simulation of the WTP was obtained applying the sample enumeration method to the individuals in the RP database. The extremes of the confidence interval were determined by the percentiles on this distribution. After trying different simulation strategies we observed that the size of the intervals was strongly affected by the outliers as well as by the magnitude of the simulated parameters. In all cases examined the simulated distribution of the corresponding WTP measure presents an asymmetric shape that was very similar for the two model specifications considered. This is consistent with previous findings using a radically different approach. We also observed that the upper extreme of the confidence interval for the value of time in private transport was very unstable for different numbers of random draws. Springer Science + Business Media, LLC, 2006 Confidence intervals nationallicence Willingness to pay nationallicence Mode choice nationallicence Espino Raquel Department of Applied Economic Analysis, Universidad de Las Palmas de Gran Canaria Edificio Departamental de C.C. E.E. y E.E., módulo D, Campus de Tafira, 35017, Las Palmas, Spain aut de Dios Ortúzar Juan Department of Transport Engineering, Pontificia Universidad Católica de Chile, Casilla 306, código 105, Santiago 22, Chile aut Román Concepción Department of Applied Economic Analysis, Universidad de Las Palmas de Gran Canaria Edificio Departamental de C.C. E.E. y E.E., módulo D, Campus de Tafira, 35017, Las Palmas, Spain aut Networks and Spatial Economics Kluwer Academic Publishers 6/2(2006-06-01), 81-96 1566-113X 6:2<81 2006 6 11067 https://doi.org/10.1007/s11067-006-7694-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11067-006-7694-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Espino Raquel Department of Applied Economic Analysis, Universidad de Las Palmas de Gran Canaria Edificio Departamental de C.C. E.E. y E.E., módulo D, Campus de Tafira, 35017, Las Palmas, Spain aut NATIONALLICENCE 700 1- de Dios Ortúzar Juan Department of Transport Engineering, Pontificia Universidad Católica de Chile, Casilla 306, código 105, Santiago 22, Chile aut NATIONALLICENCE 700 1- Román Concepción Department of Applied Economic Analysis, Universidad de Las Palmas de Gran Canaria Edificio Departamental de C.C. E.E. y E.E., módulo D, Campus de Tafira, 35017, Las Palmas, Spain aut NATIONALLICENCE 773 0- Networks and Spatial Economics Kluwer Academic Publishers 6/2(2006-06-01), 81-96 1566-113X 6:2<81 2006 6 11067 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer