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Mobilizing credit for clean energy: De-risking and public loan provision under learning spillovers 调动清洁能源信贷:在学习溢出效应下降低风险和提供公共贷款
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-19 DOI: 10.1016/j.jeem.2025.103222
Paul Waidelich , Joscha Krug , Bjarne Steffen
This paper analyzes bank lending behavior toward novel clean energy technologies in the presence of high screening costs and potential learning-by-lending. In a two-period model, bank loans in the first period build up banks’ financing experience with the novel technology, which improves lending profitability and partially spills over to peers. Because of these learning externalities, such early-stage loans are either undersupplied by the market (a cooperation problem) or do not occur at all if the banking sector remains stuck in an inferior market equilibrium with no lending (a coordination problem). We propose a policy mix in which public loan provision eliminates the inferior equilibrium, thereby resolving the coordination problem, while de-risking subsidies internalize learning spillovers to peers. Our findings highlight the role of public financial policies if environmental and innovation externalities are already addressed, and we provide a numerical application to the early stage of offshore wind energy in Germany as a plausible context for our policy implications.
本文分析了银行在存在高筛选成本和潜在的贷款学习的情况下对新型清洁能源技术的贷款行为。在两期模型中,第一期银行贷款积累了银行使用新技术的融资经验,提高了贷款盈利能力,并部分溢出给同业。由于这些学习外部性,这种早期阶段的贷款要么是市场供应不足(合作问题),要么是如果银行业仍然陷入没有贷款的劣市场均衡(协调问题),根本就不会发生。我们提出了一种政策组合,其中公共贷款提供消除了次优均衡,从而解决了协调问题,而去风险补贴将学习溢出内部化到同行。我们的研究结果强调了如果环境和创新外部性已经得到解决,公共财政政策的作用,我们提供了德国海上风能早期阶段的数值应用,作为我们政策影响的合理背景。
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引用次数: 0
Beyond the canopy: How satellite data detection thresholds influence policy evaluation and deforestation behavior 林冠之外:卫星数据检测阈值如何影响政策评估和森林砍伐行为
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-14 DOI: 10.1016/j.jeem.2025.103219
Kathryn Baragwanath , Nilesh Shinde
Satellite data is essential for enforcing and evaluating environmental policy, but technological limitations of monitoring systems can create perverse incentives and bias impact assessment. This study examines how detection thresholds in satellite monitoring systems affect both the implementation and evaluation of forest conservation policies. We identify three key mechanisms: a measurement issue, where datasets with larger minimum detection thresholds systematically miss small-scale deforestation; a loophole effect, where policy only reduces detectable, large-scale deforestation; and strategic adaptation, where regulated agents adjust behavior to exploit known detection thresholds, substituting from large- to small-scale deforestation. Studying Brazil’s 2008 municipal Blacklisting policy, we find that the government’s primary monitoring system, which does not report patches below 6.25 hectares, overestimates policy effectiveness by a third compared to datasets with smaller minimum detection thresholds. When measured with those datasets, blacklisting reduced deforestation by 31.2 % from baseline—substantially less than the 47.6 % reduction suggested by government data. Average clearing size declined by 28.9 %, with significant increases in patches below detection thresholds, reflecting both undetected and strategically fragmented activity. Our analysis reveals a critical challenge for environmental governance: as monitoring systems improve, so too do evasion strategies, requiring close attention to how technology shapes observed outcomes and on-the-ground incentives.
卫星数据对于执行和评估环境政策至关重要,但是监测系统的技术限制可能产生不正当的激励和偏见影响评估。本研究探讨卫星监测系统的探测阈值如何影响森林保护政策的执行和评价。我们确定了三个关键机制:测量问题,其中具有较大最小检测阈值的数据集系统地错过了小规模森林砍伐;漏洞效应,政策只会减少可察觉的大规模森林砍伐;战略适应,即受监管的主体调整行为以利用已知的检测阈值,从大规模森林砍伐到小规模森林砍伐。研究巴西2008年的市政黑名单政策,我们发现,政府的主要监测系统不报告6.25公顷以下的补丁,与最低检测阈值较小的数据集相比,高估了政策有效性三分之一。当用这些数据集进行测量时,黑名单使森林砍伐比基线减少了31.2%——大大低于政府数据所显示的47.6%。平均砍伐面积下降了28.9%,低于检测阈值的斑块显著增加,反映了未被检测到的和战略上分散的活动。我们的分析揭示了环境治理面临的一个关键挑战:随着监测系统的改进,逃避策略也在改进,这需要密切关注技术如何影响观察到的结果和实地激励措施。
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引用次数: 0
More than particulates matter: Multiple pollutants and productivity in Indian call centers 不仅仅是颗粒物:印度呼叫中心的多重污染物和生产力
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-13 DOI: 10.1016/j.jeem.2025.103181
Deepshikha Batheja , Sarojini Hirshleifer , Jamie T. Mullins
We measure the impact of three components of air pollution on daily labor productivity in call centers in five Indian cities. We find that a one standard deviation increase in fine particulate matter (PM2.5), a pollutant that has been the primary focus of the literature on the harms of air pollution, has a large negative effect of 0.15σ on an index of intensive margin productivity. Notably, we find a comparable negative effect for a one standard deviation increase in carbon monoxide (CO) of 0.14σ as well as a negative effect of 0.09σ from ozone (O3). For one of our main productivity variables, the number of calls per shift, one standard deviation increases in PM2.5, CO and O3 lead to declines relative to the mean of 11.8 %, 10.6 % and 6.0 %, respectively. In summing air pollution harms across our sample, CO is responsible for more than half of the total productivity lost, which is more than double the losses attributable to PM2.5. We then illustrate the potential productivity impacts of an existing national policy in India that targets PM2.5 compared to a counterfactual policy that also targets CO and O3.
我们测量了空气污染的三个组成部分对五个印度城市呼叫中心的日常劳动生产率的影响。我们发现,细颗粒物(PM2.5)的一个标准差增加,对集约边际生产率指数有0.15σ的巨大负影响,PM2.5是一种一直是空气污染危害文献的主要焦点的污染物。值得注意的是,我们发现一氧化碳(CO)每增加一个标准差就会产生0.14σ的负面影响,臭氧(O3)也会产生0.09σ的负面影响。对于我们的主要生产力变量之一,每班的呼叫次数,PM2.5, CO和O3的一个标准差增加导致相对于平均值分别下降11.8 %,10.6 %和6.0 %。在对我们样本中的空气污染危害进行汇总后发现,二氧化碳造成的生产力损失占总生产力损失的一半以上,是PM2.5造成的损失的两倍多。然后,我们说明了印度现有的以PM2.5为目标的国家政策与以CO和O3为目标的反事实政策的潜在生产力影响。
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引用次数: 0
Spilling over: The benefits of public works projects for groundwater in India 溢出:印度地下水公共工程项目的好处
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-07 DOI: 10.1016/j.jeem.2025.103218
A.Patrick Behrer , Hemant Pullabhotla
Depletion of groundwater is a major challenge in India. We examine how a major rural public works program (MNREGA) that financed the construction of surface water infrastructure may have plausibly increased aquifer recharge rates and impacted groundwater levels. Using a difference-in-differences approach on the staggered and heterogeneous roll-out of MNREGA, we show that groundwater levels increased after its implementation. These increases were concentrated in states that constructed the largest number of MNREGA-financed surface water projects. The increases we observe in groundwater appear to have led to increases in the irrigated area of high value crops and greater overall irrigation during the dry season.
地下水枯竭是印度面临的主要挑战。我们研究了资助地表水基础设施建设的主要农村公共工程计划(MNREGA)如何合理地增加了含水层补给率并影响了地下水位。通过对MNREGA错开和异质推广的差异中之差方法,我们发现地下水水位在其实施后有所增加。这些增长集中在建造了mnrega资助的地表水项目最多的州。我们观察到的地下水的增加似乎导致了高价值作物灌溉面积的增加和旱季总体灌溉面积的增加。
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引用次数: 0
Adaptation and mitigation of pollution: Evidence from air quality warnings 适应和减轻污染:来自空气质量预警的证据
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-05 DOI: 10.1016/j.jeem.2025.103215
Sandra Aguilar-Gomez
Many cities have adopted air quality alert systems to reduce the health risks from severe pollution episodes, pairing public messaging with temporary restrictions on vehicle and industrial activity. Despite their widespread implementation, evidence on their effectiveness remains mixed, in part because of data limitations and a focus on traffic-only or voluntary measures. This paper evaluates Mexico City’s air quality alert program using a fuzzy regression discontinuity design that exploits a preset ozone threshold for policy activation. I find that alerts lead to significant improvements in ozone and sulfur dioxide concentrations and sizable reductions in emergency department visits for respiratory (56 % decrease) and cardiovascular conditions (50 % decrease). The effects on transport-related pollutants are smaller and time-dependent, consistent with the alerts mitigating vehicle emissions more slowly. To assess mechanisms, I analyze information-seeking behavior, mobility data, and emissions inventories. The alerts increase online searches about air quality and the policy itself, but not about protective behaviors. Traffic volume falls and congestion improves, though public transit usage does not increase. Finally, I show that the pollution reductions are largest near restricted industrial facilities, which suggests that industrial curbs play a central role in policy effectiveness. These results can support the design of short-term environmental response policies in cities facing both mobile and stationary sources of pollution.
许多城市采用了空气质量预警系统,将公众信息与临时限制车辆和工业活动相结合,以减少严重污染事件带来的健康风险。尽管这些措施得到了广泛实施,但关于其有效性的证据仍然好坏参半,部分原因是数据有限,而且只注重交通或自愿措施。本文使用模糊回归不连续设计评估墨西哥城的空气质量警报程序,该设计利用预设的臭氧阈值进行政策激活。我发现警报导致臭氧和二氧化硫浓度的显著改善,呼吸道疾病(减少56%)和心血管疾病(减少50%)的急诊就诊人数大幅减少。对交通相关污染物的影响较小,且依赖于时间,这与缓解车辆排放的警报速度较慢相一致。为了评估机制,我分析了信息寻求行为、移动数据和排放清单。警报增加了网上对空气质量和政策本身的搜索,但对保护行为的搜索却没有增加。交通量下降,拥堵状况改善,但公共交通的使用率没有增加。最后,我指出,在受限制的工业设施附近,污染减少幅度最大,这表明工业限制在政策有效性中起着核心作用。这些结果可以为面对流动和固定污染源的城市设计短期环境响应政策提供支持。
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引用次数: 0
Optimal climate policy under exogenous and endogenous technical change: Making sense of the different approaches 外生和内生技术变化下的最优气候政策:不同方法的理解
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-08-05 DOI: 10.1016/j.jeem.2025.103216
Léo Coppens , Simon Dietz , Frank Venmans
We analyse the large and diverse literature on technical change in integrated assessment models (IAMs) of climate change, with a view to understanding how different representations of technical change affect optimal climate policy. We first solve an analytical IAM that features several models of technical change from the literature, including exogenous technical change in abatement technologies, exogenous decarbonisation of the economy, endogenous technical change via learning-by-doing, and endogenous technical change via R&D (in particular, directed technical change). We show how these models of technical change impact optimal carbon prices, emissions and temperatures in often quite different ways. We then survey how technical change is currently represented in the main quantitative IAMs used to inform policy, demonstrating that a range of approaches are used. Exogenous technical change in abatement technologies and learning-by-doing are most popular, although the latter mechanism is only partially endogenous in some models. We go on to quantify technical change in these policy models using structural estimation, and simulate our analytical IAM numerically, assessing the effect of technical change on optimal climate policy. We find large quantitative effects of technical change and large quantitative differences between different representations of technical change, both under cost-benefit and cost-effectiveness objectives.
我们分析了气候变化综合评估模型(iam)中关于技术变化的大量不同文献,以期了解技术变化的不同表示如何影响最佳气候政策。我们首先解决了一个分析性IAM,该IAM以文献中的几个技术变革模型为特征,包括减排技术的外源性技术变革、经济的外源性脱碳、通过实践学习的内源性技术变革以及通过研发(特别是定向技术变革)的内源性技术变革。我们展示了这些技术变革模型如何以不同的方式影响最优碳价格、排放和温度。然后,我们调查了目前用于通知政策的主要定量iam中如何表示技术变化,展示了使用的一系列方法。减排技术中的外生技术变化和边做边学是最受欢迎的,尽管后一种机制在某些模型中只是部分内生的。我们继续使用结构估计来量化这些政策模型中的技术变化,并在数值上模拟我们的分析IAM,评估技术变化对最优气候政策的影响。我们发现,在成本效益和成本效益目标下,技术变革的数量效应很大,不同技术变革表现形式之间的数量差异也很大。
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引用次数: 0
Nudging toward climate adaptation. A field experiment on informational strategies in organic food markets 推动适应气候变化。有机食品市场信息策略的实地试验
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-07-28 DOI: 10.1016/j.jeem.2025.103217
Cecilia Castaldo , Matilde Giaccherini , Giacomo Pallante , Alessandro Palma
We conduct a field experiment to test whether informational messages can nudge organic consumers toward purchasing “greener” products that support climate change adaptation. Leveraging data from a large Italian online shop of organic products, we use pasta as a case study to examine consumer responses to information about an ancient durum wheat variety with superior drought tolerance compared to modern wheat. We test two types of messages that frame climate adaptation as achievable through everyday choices: a colloquial information that adopts a relatable tone and a science-based message that presents evidence with visual elements. We find that the colloquial message increases the market share of “greener” pasta by 13 %, while the science-based message is effective only among highly environmentally conscious consumers. Effects persist for at least three months and are stronger among women, younger individuals, and those with higher education. The effect of colloquial messaging is amplified among consumers previously experiencing severe or extreme drought conditions. We observe a backfire effect among the greenest consumers, i.e., those who were already predominantly purchasing ancient pasta.
我们进行了一项实地实验,以测试信息信息是否可以推动有机消费者购买支持气候变化适应的“绿色”产品。利用意大利一家大型有机产品在线商店的数据,我们以意大利面为案例研究,研究消费者对一种与现代小麦相比具有更强耐旱性的古老硬粒小麦品种的信息的反应。我们测试了两种类型的信息,它们将气候适应定义为通过日常选择可以实现的:一种是采用相关语气的口语化信息,另一种是采用视觉元素呈现证据的基于科学的信息。我们发现,口语化的信息使“绿色”面食的市场份额增加了13% %,而以科学为基础的信息仅在高度环保意识的消费者中有效。这种影响至少会持续三个月,而且在女性、年轻人和受过高等教育的人群中更为明显。口语化信息的影响在以前经历过严重或极端干旱的消费者中被放大了。我们在最环保的消费者中观察到一种适得其反的效果,即那些已经主要购买古代意大利面的人。
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引用次数: 0
Environmental regulation, residential sorting, and pollution exposure among senior Americans 环境法规、住宅分类和美国老年人的污染暴露
IF 5.9 3区 经济学 Q1 BUSINESS Pub Date : 2025-07-21 DOI: 10.1016/j.jeem.2025.103211
Sayahnika Basu , Jonathan D. Ketcham , Nicolai V. Kuminoff
We investigate how environmental regulation under the U.S. Superfund program and Clean Air Act affected exposures to fine particulate air pollution and hazardous waste for Americans over age 65 during the 2000s. Our research design uses quasi-random features of how the two programs enforce regulations and provide information to estimate their causal effects on migration and pollution exposure. We show that senior Americans’ average pollution exposures declined substantially. We also show that spatially heterogeneous improvements in environmental quality had little-to-no effect on residential sorting. This led to relatively large reductions in pollution exposure for seniors living in the dirtiest areas.
我们调查了美国超级基金计划和清洁空气法案下的环境法规如何影响2000年代65岁以上美国人接触细颗粒物空气污染和危险废物的情况。我们的研究设计使用了这两个项目如何执行法规的准随机特征,并提供信息来估计它们对移民和污染暴露的因果影响。我们表明,美国老年人的平均污染暴露量大幅下降。我们还发现,环境质量的空间异质性改善对住宅分类的影响很小甚至没有影响。这使得生活在最脏地区的老年人接触污染的几率相对大幅降低。
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引用次数: 0
Carbon pricing, compensation, and competitiveness: Lessons from UK manufacturing 碳定价、补偿和竞争力:来自英国制造业的经验教训
IF 5.5 3区 经济学 Q1 BUSINESS Pub Date : 2025-07-17 DOI: 10.1016/j.jeem.2025.103208
Piero Basaglia , Elisabeth T. Isaksen , Misato Sato
Carbon pricing is often paired with compensation to carbon-intensive firms to mitigate the risk of carbon leakage. This paper empirically examines the effects of indirect carbon cost compensation on UK manufacturing firms. Using administrative microdata, we combine difference-in-differences and fuzzy regression discontinuity designs to exploit firm-level eligibility criteria and identify the causal impact of compensation. We find that compensation reduces output contraction but also increases electricity consumption and emissions. These findings highlight a key policy trade-off – while compensation can help protect firms’ competitiveness and reduce leakage risks, it may also delay industrial decarbonization and increase the overall cost of achieving national emission targets.
碳定价通常与对碳密集型企业的补偿相结合,以减轻碳泄漏的风险。本文实证研究了间接碳成本补偿对英国制造业企业的影响。利用行政微观数据,我们结合了差异中的差异和模糊回归不连续设计来探索企业层面的资格标准,并确定薪酬的因果影响。我们发现补偿减少了产出收缩,但也增加了电力消耗和排放。这些发现突出了一个关键的政策权衡——尽管补偿可以帮助保护企业的竞争力并减少泄漏风险,但它也可能延迟工业脱碳并增加实现国家排放目标的总体成本。
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引用次数: 0
Nature and the ultimate resource: Sustainability with poor input substitution 自然和最终资源:投入替代不良的可持续性
IF 5.5 3区 经济学 Q1 BUSINESS Pub Date : 2025-07-14 DOI: 10.1016/j.jeem.2025.103209
Lucas Bretschger
The paper develops an endogenous growth framework to show that poor input substitution and population growth are compatible with sustainable development, once labor and knowledge are adequately taken into account. A sustainable economy with poor input substitution relies on the combination of a favorable demand effect, providing a “safe haven" for capital and knowledge, and a supply effect that is supported by the “waterbed function" of labor. Population growth promotes sustainability through innovation, but has a negative impact if it implies increased pressure on ecosystem services. Induced innovation cannot avert an economic catastrophe when the ecology is tipping. Degrowth policies protect the environment but harm welfare level and development. Knowledge is the most important economic indicator of sustainability, but measurements at sectoral and country levels must be interpreted with great care.
本文发展了一个内生增长框架,表明一旦充分考虑劳动力和知识,投入替代和人口增长与可持续发展是相容的。投入替代较差的可持续经济依赖于为资本和知识提供“避风港”的有利需求效应和由劳动“水床功能”支撑的供给效应的结合。人口增长通过创新促进可持续性,但如果它意味着对生态系统服务的压力增加,则会产生负面影响。当生态崩溃时,诱导创新无法避免一场经济灾难。去增长政策保护了环境,但损害了福利水平和发展。知识是可持续性最重要的经济指标,但必须非常谨慎地解释部门和国家一级的衡量标准。
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引用次数: 0
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Journal of Environmental Economics and Management
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