This paper develops disaggregate car ownership models at the household level, and focuses on the effects of accessibility and trip generation. Allowance is made for the evolution of a household's tastes over time, and the variation of tastes between different population generations. The model used follows the standard discrete choice framework. Combined cross-sectional data about Swedish households, forming a time series for several years, were used, because no panel data were available. Data were collected in Stockholm in 1984, 1986-87, 1994, and 1995, and in Gothenburg in 1984, 1989, 1994, and 1995. The Stockholm 1986-87 data were based on households, and all the other data were based on individuals, with only one individual, aged between 15 and 74, being selected from a household. The data set contains standard household socio-economic data, and information on vehicle- and travel-related characteristics. Some empirical results about accessibility measures and generation effects are presented and discussed. Several accessibility indices are tested and compared. The results of using monetary inclusive value, derived from the trip frequency model, are encouraging. An `old' household, with average household age over 64, was found to be much less likely to own a car.
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