BACKGROUND Low participation rates reduce effective sample size, statistical power and can increase risk for selection bias. Previous research suggests that offering choice of participation mode can improve participation rates. However, few head-to-head trials compared choice of participation mode using telephone interviews and postal questionnaires as modes of interest. Aiming to explore effec...

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 ...

It is important to accommodate variations in responsiveness (or response heterogeneity) to level of service attributes in travel mode choice models. This response heterogeneity may be disaggregated into a systematic (observed) component and a random (unobserved) component. Earlier studies have typically considered systematic response heterogeneity by examining differences in LOS response sensit...

The present study uses probabilistic models of corpus data in a novel way, to measure and compare the syntactic predictive capacities of speakers of different varieties of the same language. The study finds that speakers’ knowledge of probabilistic grammatical choices can vary across different varieties of the same language and can be detected psycholinguistically in the individual. In three pa...