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Strategic emissions in the rain 战略排放在雨中
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-23 DOI: 10.1016/j.jdeveco.2026.103731
Runhao Zhao, Ye Yuan
Firms strategically locate and time their emissions to evade environmental regulations. We uncover a novel form of temporal evasion: firms discharge wastewater into waterways during periods of heavy rains. By employing a difference-in-differences approach and analyzing high-frequency water quality monitoring and rainfall data, we find that water pollution concentrations rise more significantly in catchment areas densely populated by polluting firms relative to low-density areas. Our empirical findings align with a stylized model that predicts polluters exploit the dilution effects of rainfall to strategically increase wastewater discharge under a threshold-based monitoring system. We estimate that this covert “polluting-in-the-rain” behavior can offset 43% of China’s annual emission reduction targets.
企业战略性地定位和确定排放时间以逃避环境法规。我们发现了一种新的时间逃避形式:企业在大雨期间将废水排放到水道中。通过采用差中之差方法并分析高频水质监测和降雨数据,我们发现,相对于低密度地区,污染企业密集的集水区的水污染浓度上升更为显著。我们的实证研究结果与一个程式化模型相一致,该模型预测在基于阈值的监测系统下,污染者利用降雨的稀释效应来战略性地增加废水排放量。我们估计,这种隐蔽的“雨中污染”行为可以抵消43%的中国年度减排目标。
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引用次数: 0
Where has all the dynamism gone? Productivity growth in China’s manufacturing sector, 1998–2013 所有的活力都到哪里去了?1998-2013年中国制造业生产率增长
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-20 DOI: 10.1016/j.jdeveco.2026.103720
Loren Brandt , Johannes Van Biesebroeck , Luhang Wang , Yifan Zhang
China’s manufacturing sector has been a key source of the economy’s dynamism. Analysis after 2007 however is hampered by problems in the key data source for empirical analysis, the National Bureau of Statistics’ (NBS) annual survey of industrial firms. Issues include missing information on value added and intermediate inputs, and concerns of over-reporting. The annual survey of firms conducted by China’s State Taxation Administration (STA) provides a reliable, alternative source of firm-level data for the years 2007 to 2013. Since the sample is not representative and the precise sampling scheme is not known, the data cannot be used directly to draw inferences on China’s manufacturing sector. By comparing the joint distribution of key variables for which both surveys provide reasonably reliable information, we recover the sampling scheme of the STA survey and use it to simulate samples for 2007 to 2013 that are comparable to the NBS sample in earlier years. Our estimates reveal a marked slowdown in revenue-based total factor productivity growth that cuts across all industries, ownership types, and regions. The loss of dynamism in the private sector, and the reduced contribution of firm entry to aggregate productivity growth are especially prominent.
中国制造业一直是经济活力的重要来源。然而,2007年以后的分析受到实证分析的关键数据来源——国家统计局工业企业年度调查的问题的阻碍。问题包括缺少关于增值和中间投入的信息,以及对多报的担忧。中国国家税务总局(STA)对企业进行的年度调查为2007年至2013年的企业层面数据提供了可靠的替代来源。由于样本不具有代表性,并且不知道精确的抽样方案,因此这些数据不能直接用于推断中国制造业。通过比较两项调查提供合理可靠信息的关键变量的联合分布,我们恢复了国家统计局调查的抽样方案,并使用它来模拟2007年至2013年的样本,这些样本与早些年的国家统计局样本相当。我们的估计显示,以收入为基础的全要素生产率增长明显放缓,这种放缓遍及所有行业、所有制类型和地区。私营部门活力的丧失以及企业进入对总生产率增长的贡献减少尤为突出。
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引用次数: 0
Cooperation between national armies: Evidence from the Sahel borders 国家军队之间的合作:来自萨赫勒边境的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-19 DOI: 10.1016/j.jdeveco.2026.103726
Marion Richard , Oliver Vanden Eynde
The effectiveness of security operations often depends on cooperation between national armies. Such cooperation can be particularly important when international borders are porous and armed groups can operate across borders. We investigate how the creation of an international armed force that could operate across international borders (the G5-Sahel Joint Force) together with improved communication between national armies affected conflict dynamics in the Sahel region. Relying on a regression discontinuity design, we find that the G5 mission lowered the intensity of conflict locally in its zone of operation, especially along border segments more porous due to their geographical features or ethnic composition. Further analysis of geographical conflict propagation patterns indicates that the G5-Sahel force facilitated security operations in border areas.
安全行动的有效性往往取决于各国军队之间的合作。在国际边界漏洞百出、武装团体可以跨界活动的情况下,这种合作尤为重要。我们调查了建立一支可以跨越国际边界的国际武装部队(g5 -萨赫勒联合部队)以及改善各国军队之间的沟通如何影响萨赫勒地区的冲突动态。依靠回归不连续设计,我们发现G5特派团降低了其行动区内局部冲突的强度,特别是沿着边界段,由于其地理特征或种族组成而更加多孔。对地理冲突传播模式的进一步分析表明,五国集团-萨赫勒部队促进了边境地区的安全行动。
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引用次数: 0
The effects of cash and group therapy in the context of conflict: Evidence from a randomized evaluation in Ethiopia 现金和团体治疗在冲突背景下的效果:来自埃塞俄比亚随机评估的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-17 DOI: 10.1016/j.jdeveco.2026.103724
Melissa Hidrobo , Harold Alderman , Negussie Deyessa , Daniel O. Gilligan , Parthu Kalva , Jessica Leight , Michael Mulford , Heleene Tambet
The prevalence of depression remains high in low-income contexts, particularly those affected by conflict. This paper reports on a randomized controlled trial conducted in rural Ethiopia assessing the effects of a psychological (group therapy) intervention delivered by non-specialist health staff, as well as a large one-time cash transfer delivered post-therapy. The trial includes three arms comparing group therapy, cash, and both jointly to a status quo control within a sample of individuals reporting some depressive symptoms or functional impairment at baseline. The study occurred between 2022 and 2024, during a period of active armed conflict. Findings show that sixteen months post-baseline, there are no persistent positive effects of group therapy alone; cash alone improves time use and economic outcomes. Group therapy and cash jointly improve psychosocial skills, time use, and economic outcomes, and in areas not affected by conflict, the joint intervention also improves mental health.
在低收入环境中,尤其是受冲突影响的地区,抑郁症的患病率仍然很高。本文报告了在埃塞俄比亚农村进行的一项随机对照试验,该试验评估了非专业卫生人员提供的心理(团体治疗)干预以及治疗后提供的大量一次性现金转移的效果。该试验包括三个组,将团体治疗、现金治疗和两者联合治疗与现状对照进行比较,这些对照是在基线时报告一些抑郁症状或功能障碍的个体样本中进行的。这项研究发生在2022年至2024年之间,正值武装冲突时期。研究结果显示,基线后16个月,单独团体治疗没有持续的积极效果;现金本身就能提高时间利用和经济效益。团体治疗和现金共同改善了社会心理技能、时间利用和经济成果,在未受冲突影响的地区,联合干预还改善了心理健康。
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引用次数: 0
Higher education expansion and the rural–urban gap in secondary schooling and labor outcomes: Evidence from China’s 1999 reform 高等教育扩张、中等教育城乡差距和劳动力产出:来自中国1999年改革的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-17 DOI: 10.1016/j.jdeveco.2026.103721
Ruoming Zhang
This study examines how China’s 1999 expansion of university admissions reshaped rural and urban students’ academic high-school choices and, in turn, rural–urban gaps in schooling and employment. Treating the nationwide expansion of tertiary capacity as an exogenous shock, we use microdata from the 2015 1% Population Sample Survey of China to estimate difference-in-differences models with county and cohort fixed effects. Relative to comparable urban cohorts, rural students exposed to the reform were 2.9 percentage points more likely to complete the academic high school track and accumulated an additional 0.26 years of schooling. The expansion also reallocated rural workers away from low-skill employment by 5.1 percentage points. These findings indicate a strong indirect channel operating through upper-secondary choices, while underscoring the need for complementary investments in rural upper-secondary schools and local non-farm labor markets. The evidence is consistent with changes in expectations and application behavior at the upper-secondary transition: national tertiary expansion increased the perceived attainability of the academic track for rural cohorts, inducing adjustments in continuation decisions.
本研究考察了中国1999年的大学扩招如何重塑了农村和城市学生的高中学业选择,进而影响了城乡在教育和就业方面的差距。本文将全国第三产业产能扩张作为外生冲击,利用2015年中国1%人口抽样调查的微观数据,估计了具有县和队列固定效应的差异中差模型。与可比的城市学生相比,接受改革的农村学生完成高中学业的可能性高出2.9个百分点,累计受教育年限增加了0.26年。经济扩张还使农村劳动力从低技能就业岗位转移了5.1个百分点。这些研究结果表明,通过高中选择,存在强大的间接渠道,同时强调需要对农村高中和当地非农劳动力市场进行补充投资。证据与高中过渡阶段期望和申请行为的变化是一致的:国家高等教育的扩张增加了农村群体对学术轨道的可达性的感知,导致了继续决策的调整。
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引用次数: 0
Heatwaves and delivery practices: The effects of extreme temperature in Brazilian maternity wards 热浪和分娩实践:极端温度对巴西产科病房的影响
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-17 DOI: 10.1016/j.jdeveco.2026.103725
Rafael Parfitt , Nicolas Goulart
This paper examines how extreme heat affects healthcare delivery, using data on around 25 million births in Brazilian public hospitals between 2008 and 2019. Combining satellite-based temperature records with a high-dimensional fixed-effects design, we study how delivery practices and provider allocation vary with short-run temperature fluctuations in maternity wards. We find that extreme heat is associated with a lower probability that deliveries are led by physicians and a corresponding increase in nurse-led births, alongside a decline in cesarean section rates. Among physician-attended deliveries, extremely hot days are associated with a higher likelihood of pre-labor cesarean sections, consistent with shifts toward faster procedures under thermal stress. We find no detectable effects on immediate neonatal health as measured by Apgar scores. Together, these results suggest that temperature shocks reshape clinical decision-making and task allocation in maternity wards, revealing an operational channel through which climate stress affects healthcare delivery.
本文使用2008年至2019年巴西公立医院约2500万新生儿的数据,研究了极端高温如何影响医疗服务。结合基于卫星的温度记录和高维固定效应设计,我们研究了分娩实践和提供者分配如何随产科病房短期温度波动而变化。我们发现,极端高温与医生主导分娩的可能性较低、护士主导分娩的几率相应增加以及剖宫产率下降有关。在由医生接生的产妇中,极端炎热的天气与产前剖宫产的可能性较高有关,这与热应激下快速分娩的趋势相一致。通过阿普加评分,我们没有发现对新生儿健康的直接影响。总之,这些结果表明,温度冲击重塑了产科病房的临床决策和任务分配,揭示了气候压力影响医疗保健服务的操作渠道。
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引用次数: 0
NAFTA and drug-related violence in Mexico 北美自由贸易协定和墨西哥与毒品有关的暴力
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-12 DOI: 10.1016/j.jdeveco.2026.103719
Eduardo Hidalgo , Erik Hornung , Pablo Selaya
We study how NAFTA changed the geography of violence in Mexico. We propose that this open border policy increased trafficking profits of Mexican cartels, resulting in violent competition among them. We test this hypothesis by comparing changes in drug-related homicides after NAFTA’s introduction in 1994 across municipalities with and without drug-trafficking routes. Routes are predicted least cost paths connecting municipalities with a recent history of detected drug trafficking with U.S. land ports of entry. On these routes, homicides increase by 2.1 per 100,000 inhabitants, which is equivalent to 26% of the pre-NAFTA mean. These results cannot be explained by changes in worker’s opportunity costs of using violence resulting from the trade shock.
我们研究北美自由贸易协定如何改变墨西哥的暴力地理。我们认为,这一开放边境政策增加了墨西哥贩毒集团的贩运利润,导致它们之间的暴力竞争。我们通过比较1994年北美自由贸易协定生效后与毒品有关的凶杀案在有和没有贩毒路线的城市之间的变化来检验这一假设。预测的路线是连接最近被发现有毒品贩运历史的城市和美国陆地入境口岸的成本最低的路径。在这些路线上,每10万居民中有2.1人被谋杀,相当于北美自由贸易协定之前平均值的26%。这些结果不能用贸易冲击导致的工人使用暴力的机会成本的变化来解释。
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引用次数: 0
Kinship ties in politics and response to extreme weather shocks 政治上的亲属关系和对极端天气冲击的反应
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-09 DOI: 10.1016/j.jdeveco.2025.103716
Charles Irvin S. Siriban
It is well-established that ties between politicians influence the distribution of public resources, particularly in policy domains where officials enjoy substantial discretion. Other policy areas, such as disaster response, have more limited scope for discretionary targeting. To what extent does political alliance influence the allocation of resources in these settings? Focusing on the case of the Philippines, I examine if kinship ties between two major local politicians – provincial governor and congressperson – influence the response to typhoon shocks. Using a close-election regression discontinuity design, I find that kin-connected governors respond better than other governors to strong typhoon shocks. I argue that the effect can be explained by both supply and demand channels. I find suggestive evidence that governors leverage their connections to congresspersons to request more assistance from the national government. Furthermore, voters reward kin-connected governors for their response to strong typhoons. These results provide a lower-bound estimate on the effects of political alliances on the allocation of fiscal resources.
众所周知,政治家之间的关系会影响公共资源的分配,特别是在官员享有很大自由裁量权的政策领域。其他政策领域,如灾害应对,自由选择目标的范围更为有限。在这些情况下,政治联盟对资源配置的影响有多大?以菲律宾为例,我考察了当地两位主要政治家——省长和国会议员——之间的亲属关系是否会影响对台风冲击的反应。利用近距离选举回归不连续设计,我发现亲缘关系省长比其他省长对强台风的反应更好。我认为这种效应可以用供给渠道和需求渠道来解释。我发现有证据表明,州长利用他们与国会议员的关系向国家政府请求更多援助。此外,选民还会奖励有亲属关系的州长对强台风的反应。这些结果为政治联盟对财政资源配置的影响提供了一个下限估计。
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引用次数: 0
Firms under fire! How insecurity affects formal firms’ existence 公司受到攻击!不安全感如何影响正规企业的存在
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-07 DOI: 10.1016/j.jdeveco.2025.103714
Matteo Neri-Lainé
This paper studies the effect of insecurity on formal firms’ existence. We develop a flexible theoretical framework in which insecurity, a latent production cost, affects firms’ market entry, exit, and formality decisions. In our empirical analysis, we combine an original dataset on Afghan firms with georeferenced data on military events that we use to proxy insecurity. In the state-building context of post-2003 Afghanistan, military events reflect not only violence but also state capacity expansion. For formal firms, this latter channel dominates. As a result, increased exposure to military events conveys on average a reduction in effective insecurity and positively impacts formal firm existence. Nonetheless, this effect is highly heterogeneous depending on actors, location, timing and firms’ characteristics. The Afghan conflict has the specificity of deeply involving foreign countries. Mobilizing this particular source of exogenous variation, we identify the causal effect of an insecurity reduction on formal firms’ existence. We show that an increase of 1% in the exposure to instrumented military events raises the formal activity probability by 3.8%.
本文研究了不安全感对正规企业生存的影响。我们开发了一个灵活的理论框架,其中不安全感,一种潜在的生产成本,影响企业的市场进入,退出和形式决策。在我们的实证分析中,我们将阿富汗公司的原始数据集与我们用来代表不安全的军事事件的地理参考数据结合起来。在2003年后阿富汗国家建设的背景下,军事事件不仅反映了暴力,也反映了国家能力的扩张。对于正规企业来说,后一种渠道占主导地位。因此,增加对军事事件的接触平均减少了有效的不安全感,并对正式公司的存在产生积极影响。然而,这种影响是高度异质性的,取决于参与者、地点、时间和公司的特点。阿富汗冲突具有深深涉及外国的特殊性。利用这一外生变异的特殊来源,我们确定了不安全感减少对正规企业存在的因果影响。我们表明,接触仪器化军事事件每增加1%,正式活动概率就会提高3.8%。
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引用次数: 0
Labor market consequences of homicides: A gender perspective from Mexico 杀人案对劳动力市场的影响:来自墨西哥的性别视角
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-01-07 DOI: 10.1016/j.jdeveco.2026.103718
Lorenzo Aldeco Leo , Matteo F. Ghilardi , Hugo Tuesta
This paper explores how fluctuations in crime rates influence labor market outcomes in Mexico. Using detailed survey data and an individual-fixed effect estimation, the analysis reveals distinct gender dynamics in response to rising homicide rates. Men are more likely to exit the labor market, while women increasingly join the workforce, mainly in the informal sector. This pattern is consistent with an added-worker effect, which we document using household-level evidence. This outcome is largely driven by the presence of drug trafficking organizations, which primarily employ men in their operations. Escalating violence also increases labor mobility, leading to higher job separations, especially among women. Our results highlight that while increasing crime in the form of homicides may not induce large changes in the aggregate level of employment, there is evidence of labor reallocation across and within sectors. This suggests an increase in labor market misallocation.
本文探讨了犯罪率波动如何影响墨西哥劳动力市场的结果。使用详细的调查数据和个人固定效应估计,分析揭示了不同的性别动态响应上升的杀人率。男性更有可能退出劳动力市场,而女性则越来越多地加入劳动力队伍,主要是在非正规部门。这种模式与“额外工人效应”是一致的,我们使用家庭层面的证据来证明这一点。造成这一结果的主要原因是毒品贩运组织的存在,这些组织主要雇用男子从事其活动。暴力升级还增加了劳动力流动性,导致更高的离职率,尤其是在女性中。我们的研究结果强调,虽然以杀人形式增加的犯罪可能不会引起总就业水平的大变化,但有证据表明,部门之间和部门内部的劳动力重新分配。这表明劳动力市场分配不当的情况有所增加。
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引用次数: 0
期刊
Journal of Development Economics
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