Campaign contributions, partisan politics, and environmental polarization in the US Congress
利用断点回归设计，发现选举共和党议员会使来自反环保行业的捐款重要性大幅上升，且捐款依赖度越高，议员越不倾向支持环保立法。
Abstract Prior literature has shown strong and increasing polarization on environmental voting in the US Congress, with Democrats tending to support pro-environmental (“green”) legislation and Republicans opposing it. Employing a regression discontinuity design, we provide a causal estimate of the effect of partisanship on the importance of campaign contributions from brown industries received by US legislators. Electing a Republican rather than a Democrat for the House (Senate) leads to an increase of 96% (70%) in the importance of contributions from anti-environmental (“brown”) groups. We also find that greater dependence on brown groups is associated with less pro-environmental voting for legislators from both parties and the greater the importance of brown contributions the more (less) likely that a legislator breaks the party line when its party favors (opposes) pro-environmental legislation. Finally, we provide an analytical narrative of the rise and pattern of environmental polarization consistent with our empirical findings.