Car ownership after having children: Exploring the impacts of income and public transport accessibility

Mobility research and theory suggests that new parents often develop a car-dependent way of living that runs counter to prevailing climate policies. In this context, the current study investigates the influence of public transport accessibility on car ownership among first-time parents in the Oslo region. Specific attention is paid to how the effect of accessibility varies with different income levels. Linear probability and fixed-effects models are applied to parents and a control group of non-parents to explore these relationships. The results show that public transport accessibility reduces the likelihood of car ownership in the years after family formation, although with larger impacts for some income groups than for others. Households with a high income combine car ownership with high access, whereas others seem to sacrifice one for the other. These findings have several policy implications. First, urban regions with a combination of gentrification in the central city and increasing poverty in suburban areas face a potential conflict between environmental and social sustainability. Finding ways to increase central-city opportunities for low- and medium-income families is a difficult but important step towards greater overall sustainability. Second, the reduction of car ownership among high-income households appears to require supplementary measures. The article ends with a discussion of the findings in the context of broader urban policy development, particularly in relation to the prioritisation of collective consumption.