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女性政治领袖作为环境变革的代理人

Women Political Leaders as Agents of Environmental Change
Journal of Development Economics · 2025 · [{"name": "Inés Berniell", "affiliation": []}, {"name": "Mariana Marchionni", "affiliation": []}, {"name": "Julián Pedrazzi", "affiliation": []}, {"name": "Mariana Viollaz", "affiliation": ["National University of Salta"]}]

中文摘要

本文利用巴西两性市长竞选的数据,探讨女性政治领导人如何影响环境结果与气候变化政策行动。我们采用断点回归设计,比较女性以微弱优势获胜的市镇与男性以微弱优势获胜的市镇,以识别女性赢得市长选举的因果效应。研究发现,与男性市长相比,女性市长在拥有亚马孙生物群系的市镇显著减少了温室气体排放和森林砍伐。具体而言,女性赢得选举后,亚马孙地区每个市镇的年温室气体排放量减少1,510千吨二氧化碳当量(CO2e)。仅此一项效应即相当于亚马孙生物群系内所有市镇平均年排放量的23%,以及巴西全国平均水平的6.4%。这一减少主要由土地利用部门排放强度(CO2e/GDP)的下降驱动,而市镇经济活动本身并未发生变化。土地利用部门排放减少的部分原因,可归因于森林砍伐的下降:亚马孙地区由女性领导的市镇森林砍伐减少,相对于基线森林覆盖,森林形态损失下降3个百分点,较对照市镇的森林砍伐水平减少32%。我们进一步考察了可能解释女性以微弱优势击败男性对手当选市长所带来的积极环境影响的潜在机制,发现在亚马孙地区的市镇,当选女性市长在政府施政提案中为环境议题分配了更多篇幅,也更可能投资于环境类项目。当选男女市长在环境法规执行力度和受教育水平上的差异,均不能解释上述结果。

Abstract

This paper explores how female political leaders impact environmental outcomes and climate change policy actions using data from mixed-gender mayoral races in Brazil. We rely on a Regression Discontinuity design that compares municipalities where women narrowly won the election with those where men narrowly won. This strategy allows us to identify the causal effect of a woman winning the mayoral election. We find that, compared to male mayors, female mayors significantly reduce greenhouse gas emissions and deforestation in the municipalities with Amazon biome. Specifically, when a woman wins the election, annual greenhouse gas emissions decrease by 1,510 thousand tons of CO2e per municipality in the Amazon. This effect alone represents 23% of the average annual emissions of all municipalities within the Amazon biome and 6.4% of Brazil's nationwide average. This reduction is driven by a reduction in emissions intensity (CO2e/GDP) in the Land Use sector, without changes in municipal economic activity. Part of the reduction in emissions in the Land Use sector is attributable to a decline in deforestation. Specifically, female-led municipalities in the Amazon experience a reduction in deforestation, with a 3 percentage-point decrease in the loss of forest formations relative to the baseline forest cover. This represents a 32% reduction compared to deforestation levels in the comparison municipalities. We examine potential mechanisms that could explain the positive environmental impact of narrowly electing a female mayor over a male counterpart and find that in Amazon municipalities, female elected mayors allocate more space to the environment in their government proposals and are more likely to invest in environmental initiatives. Differences in the enforcement of environmental regulations and the level of education of elected female and male mayors do not explain the results.
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