Playing Well with Others: The Role of Social Capital in Traffic Accident Prevention

摘要

Using data from a panel of 48 US states during 1997-2006,1 present evidence that social capital reduces fatal traffic accidents by fostering pro-social behavior among drivers. I estimate simultaneous equation systems that model the incidence of interpersonal interaction-related vs non-interaction-related traffic outcomes, in which variation in endogenous social capital is identified using snow depth. My results show that social capital has a larger relative effect on multi-vehicle and junction-related fatalities and fatal crashes, incidents with respect to which motorist interaction is most critical to outcomes. The findings are robust to alternative specifications and measures of social capital.