加利福尼亚州各县的污染和致命交通事故

IF 3.3 2区经济学 Q2 AGRICULTURAL ECONOMICS & POLICY

Applied Economic Perspectives and Policy Pub Date : 2023-09-04 DOI:10.1002/aepp.13396

Mark Braun, Sofia B. Villas-Boas

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引用次数: 0

摘要

我们使用工具变量估计污染对致命交通事故的因果效应。利用逆温和东风对直径小于等于2.5微米的细颗粒物(PM2.5)的影响，我们发现PM2.5对致命交通事故的影响正相关。PM2.5每增加1 g/m3，死亡人数平均增加1.3%。这一增长相当于加州每年平均死亡人数增加67人。我们估计的积极影响与吸入污染引起的认知功能等机制一致。异质性分析发现，这一机制在非农村和低收入县更为恶化，而在空气质量差的日子里，司机的风险规避减轻了这一机制。

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Pollution and fatal traffic accidents in California counties

We estimate pollution's causal effect on fatal traffic accidents using instrumental variables. Using variation in fine particulate matter of 2.5 micrometers in diameter or less (PM_2.5) because of air temperature inversions and eastward wind, we find that of PM_2.5 positively affects fatal traffic accidents. Fatalities increase on average by 1.3% when PM_2.5 increases by 1 $μ$ g/m³. This increase corresponds to 67 more yearly fatalities in California on average. The positive effects we estimate are consistent with mechanisms such as cognitive function due to pollution inhalation. Heterogeneity analysis finds that this mechanism is worsened for non-rural and for lower-income counties while it is mitigated by driver risk aversion during poor air quality days.

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来源期刊

Applied Economic Perspectives and Policy AGRICULTURAL ECONOMICS & POLICY-

CiteScore

10.70

自引率

6.90%

发文量

117

审稿时长

>12 weeks

期刊介绍： Applied Economic Perspectives and Policy provides a forum to address contemporary and emerging policy issues within an economic framework that informs the decision-making and policy-making community. AEPP welcomes submissions related to the economics of public policy themes associated with agriculture; animal, plant, and human health; energy; environment; food and consumer behavior; international development; natural hazards; natural resources; population and migration; and regional and rural development.