Relational Costs and the Production of Social Capital: Evidence from Carpooling
提出同种族的人更容易建立社会联系，并用拼车行为作为社会资本的新指标验证这一假设，发现邻里中同种族比例越高，个人越可能参与拼车。
This article posits that individuals can more easily form social connections with people if they are of the same race. If true, the greater the incidence among his neighbours of persons of his race, the more likely an individual is to make neighbourhood social capital connections and the more likely he is to engage in activities which require it. The article tests this idea using an indicator of individual social capital never previously studied: whether the person uses a carpool to get to work. The analysis accounts for fixed differences across neighbourhoods, and a variety of extensions address possible differential racial sorting into neighbourhoods. The evidence strongly supports the article's hypothesis. Copyright 2006 Royal Economic Society.