A growing number of communities in the United States are seeking to improve the sustainability of their transportation systems by shifting routine automobile travel to walking and bicycling. In order to identify strategies that may be most effective at increasing pedestrian and bicycle...

We develop a model of the private provision of public goods in a world where agents face convex costs of provision. Consonant with prior empirical evidence, we introduce preference heterogeneity by allowing a subset of agents to exhibit pro-social behavior that reflects "green" preferences. We...