In order to control for censoring and the integer nature of trip demand, the use of count data models in travel cost analysis is attractive. Two such models, the Poisson and negative binomial, are discussed. Robust estimation techniques that loosen potentially stringent distributional...

1. Einführung: Kausale Aussagen und Prognosemodelle -- 2. Abhängige Variablen mit begrenztem Wertebereich -- 3. Zeitreihenanalyse und dynamische Modelle -- 4. Paneldatenanalyse -- 5. Instrumentvariablen -- 6. Strukturgleichungsmodelle -- 7. Fehlende Werte (Missing values) -- 8. Ergänzungen.

In 2010-2012 new outpatient service locations were established in Hungarian micro-regions, which had lacked such capacities before. We exploit this quasi-experiment to estimate the effect of geographical accessibility on outpatient case numbers using both individual-level and semi-aggregate...