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政治晋升激励与环境代价:来自中国晋升锦标赛的证据

Political career incentives and the environmental costs: Evidence from China’s promotion tournaments
Journal of Development Economics · 2027 · Jingxuan Xu、Hao Xu、Guangrong Ma

中文摘要

本文表明,中国县级干部的晋升激励是空气质量恶化的重要驱动因素。基于 Clark 和 Riis(1998)提出的多胜者锦标赛模型,我们预测,一个地级市内所辖县的数量与县级干部的晋升激励之间呈倒 U 形关系。我们以小河流的长度作为地级市内县数量的工具变量,实证分析识别出县数量与空气污染水平之间稳健的倒 U 形关系,表明晋升激励显著加剧了空气污染。进一步分析显示,为追求经济增长,地方干部倾向于放松环境监管并吸引更多污染密集型企业的进入。在干部绩效考核对经济增长重视程度较低的地区,这一倒 U 形关系并不存在。这些发现表明,地方干部的晋升激励以牺牲环境为代价刺激了经济增长。

Abstract

This paper shows that promotion incentives for county-level cadres in China are an important driver of air pollution deterioration. Building on the multi-winner tournament model proposed by Clark and Riis (1998), we predict an inverted-U-shaped relationship between the number of counties within a prefecture and the promotion incentives for county-level cadres. Using the length of small rivers as an instrumental variable for the number of counties within a prefecture, our empirical analysis identifies a robust inverted-U-shaped relationship between the number of counties and air pollution levels, suggesting that promotion incentives significantly exacerbate air pollution. Further analysis reveals that, in pursuit of economic growth, local cadres tend to relax environmental regulations and attract more pollution-intensive firms. In regions where cadres’ performance evaluation places less emphasis on economic growth, the inverted-U-shaped relationship does not exist. These findings suggest that local cadres’ career incentives stimulate economic growth at the expense of the environment.
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