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Urbanization and educational attainment: Evidence from Africa 城市化与教育程度:来自非洲的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-10-11 DOI: 10.1016/j.jdeveco.2025.103654
Raoul van Maarseveen
Despite the rapid urbanization of the developing world, little remains known about how urban migration and residency affect childhood outcomes. Using census data for 14 African countries combined with an age-at-move design, I show that childhood exposure to cities significantly increases primary school completion and literacy rates, even among children from poor urban households. Better availability of schools and lower opportunity costs of education in cities appear to be important channels to explain the positive effects. The paper thus provides evidence of a novel channel through which urban migration can promote economic development.
尽管发展中国家正在快速城市化,但人们对城市移民和居住如何影响儿童结局知之甚少。我利用14个非洲国家的人口普查数据,结合迁移年龄设计,表明童年时期接触城市显著提高了小学完成率和识字率,即使是来自贫困城市家庭的儿童也是如此。城市中更好的学校可用性和更低的教育机会成本似乎是解释这些积极影响的重要渠道。因此,本文为城市移民促进经济发展的新渠道提供了证据。
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引用次数: 0
Persistent effects of universities on local industrial growth: Evidence from China's policy-induced college relocation in the 1950s 大学对地方产业增长的持续影响:来自20世纪50年代中国政策性大学搬迁的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-09-10 DOI: 10.1016/j.jdeveco.2025.103628
Jianyong Fan , Wei Tang , Feng Zhang
This paper examines the long-term impact of universities on local industrial development by leveraging a large-scale department relocation program in China during the 1950s, which reassigned more than two thirds of all university departments nationwide. While these relocations had limited influence under the planned economy, their impact became increasingly pronounced after China's economic liberalization in 1978. Our findings reveal substantial effects on total employment, firm numbers, and productivity in industries technologically related to the relocated departments. Importantly, these effects intensified over time, in sharp contrast to contemporaneous place-based policies that primarily redistributed physical capital. We highlight direct knowledge spillovers and the formation of industry-specific local talent pool as two underlying mechanisms driving the relocation effects.
本文通过利用20世纪50年代中国大规模的院系搬迁计划,考察了大学对地方工业发展的长期影响,该计划重新分配了全国三分之二以上的大学院系。虽然这些搬迁在计划经济下影响有限,但在1978年中国经济自由化之后,它们的影响变得越来越明显。我们的研究结果揭示了在技术上与搬迁部门相关的行业中,对总就业、企业数量和生产率的实质性影响。重要的是,这些影响随着时间的推移而加剧,与当时主要重新分配物质资本的基于地方的政策形成鲜明对比。我们强调了直接的知识溢出和特定行业的本地人才库的形成是驱动搬迁效应的两个潜在机制。
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引用次数: 0
Pedaling to wellness: The impact of dockless bike-sharing services on physical and mental health in China 骑车健康:无桩共享单车服务对中国人身心健康的影响
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-08-29 DOI: 10.1016/j.jdeveco.2025.103619
Xun Li , Congling Xia
This paper investigates the impact of dockless bike-sharing services (DBS), a key element of the sharing economy in China, on residents’ physical and mental well-being, as well as their social behaviors. Leveraging the phased introduction of DBS in Chinese cities between 2015 and 2020 and multiple data sets, we employ a staggered DID design with continuous treatment to evaluate the causal effects. We find that the introduction of DBS leads to a significant reduction in body mass index (BMI) and depression scores. These effects vary across individuals’ employment status, household physical capital and the geographic slope of cities. Additionally, we find that the entry of DBS increases the frequency and duration of exercise per week, while decreasing residents’ internet usage and online social interactions, indicating more active and offline social engagements. Our findings survive a battery of robustness checks. This study expands the discussion on the sharing economy beyond its economic and commercial impacts to highlight its social and health benefits, offering a fresh perspective on how the sharing economy contributes to sustainable urban development and the promotion of a healthy society.
本文研究了无桩共享单车服务(DBS)对居民身心健康以及社会行为的影响,DBS是中国共享经济的一个关键要素。利用2015年至2020年在中国城市分阶段引入DBS的数据集和多个数据集,我们采用交错DID设计和连续处理来评估因果效应。我们发现,DBS的引入导致身体质量指数(BMI)和抑郁评分显著降低。这些影响因个人的就业状况、家庭物质资本和城市的地理坡度而异。此外,我们发现DBS的加入增加了每周锻炼的频率和持续时间,同时减少了居民的互联网使用和在线社交,表明更积极和线下的社交活动。我们的发现经受住了一系列稳健性检查。本研究扩展了对共享经济的讨论,超越了其经济和商业影响,突出了其社会和健康效益,为共享经济如何促进可持续城市发展和促进健康社会提供了一个新的视角。
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引用次数: 0
Complementing business training with access to finance: Evidence from SMEs in Kenya 以融资渠道补充商业培训:来自肯尼亚中小企业的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-09-30 DOI: 10.1016/j.jdeveco.2025.103645
Anik Ashraf , Elizabeth Lyons
This paper investigates the complementarity between business training and timely access to financial capital for small and medium enterprises (SMEs) in Kenya. All participants in the business support program we study are offered training. One-third of participants are offered loans immediately after training (Concurrent Loan group), one-third are offered loans six weeks after training (Delayed Loan group), and the remaining third are offered loans after another four weeks (Control group). While a long time lag may reduce knowledge retention and application among SMEs, concurrent access to loans and associated business spending may divert the entrepreneurs’ attention away from improving business practices. We find evidence for the latter in both intention-to-treat and treatment-on-the-treated estimates. While SMEs in both Control and Delayed Loan groups improve their business practices, SMEs in the Concurrent Loan group who take loans do not improve their practices at all. Moreover, entrepreneurs who take loans spend less time on their businesses and experience declines in their business revenue.
本文研究了肯尼亚中小企业业务培训与及时获得金融资本之间的互补性。我们研究的所有商业支持计划的参与者都得到了培训。三分之一的参与者在培训后立即获得贷款(同步贷款组),三分之一的参与者在培训后六周获得贷款(延迟贷款组),其余三分之一的参与者在培训后四周获得贷款(对照组)。虽然长时间滞后可能会减少中小企业的知识保留和应用,但同时获得贷款和相关业务支出可能会转移企业家对改进业务实践的注意力。我们在意向治疗和治疗对治疗的估计中都发现了后者的证据。虽然控制贷款组和延迟贷款组中的中小企业都改进了他们的业务实践,但同时贷款组中的中小企业根本没有改进他们的实践。此外,贷款的企业家花在生意上的时间更少,业务收入也会下降。
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引用次数: 0
Income shocks and mortality of low-wage workers: Evidence from wage allowances in Brazil 低收入工人的收入冲击和死亡率:来自巴西工资津贴的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-10-11 DOI: 10.1016/j.jdeveco.2025.103656
Caio Pedro Castro , Raphael Corbi
We examine the short-term impact of income shocks on mortality in Brazil using administrative data and the quasi-random timing of disbursements from a federal wage allowance program for low-income workers. Exploiting variation in payment timing by birth month and a sharp eligibility cutoff, we find that mortality increases by 9.5% during the week of payment, particularly for deaths related to economic activity such as cardiovascular conditions and external causes. Effects are strongest in areas with low financial development and poor healthcare access, suggesting that limited consumption smoothing and delayed medical care amplify mortality risks. Our findings highlight how institutional constraints in developing countries shape the health consequences of predictable income transfers, with implications for the design and timing of social protection programs.
我们使用行政数据和准随机的低收入工人联邦工资津贴计划支付时间来检验巴西收入冲击对死亡率的短期影响。利用按出生月份支付时间的变化和明显的资格截止时间,我们发现,在支付的一周内,死亡率增加了9.5%,特别是与心血管疾病和外部原因等经济活动有关的死亡。在金融发展水平较低和医疗保健可及性较差的地区,这种影响最为强烈,这表明有限的消费平滑和延迟的医疗服务放大了死亡风险。我们的研究结果强调了发展中国家的制度限制如何影响可预测收入转移的健康后果,并对社会保护计划的设计和时机产生影响。
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引用次数: 0
Diffusion in social networks: Experimental evidence on information sharing vs persuasion 社会网络中的扩散:信息共享与说服的实验证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-11-20 DOI: 10.1016/j.jdeveco.2025.103686
Marcel Fafchamps , Asad Islam , Debayan Pakrashi , Denni Tommasi
Human behaviors and innovations often spread through social networks, yet the mechanisms driving this diffusion — information sharing or persuasion — remain debated. Using a large-scale randomized controlled trial in Uttar Pradesh, India, we examine these dynamics while promoting a newly introduced savings commitment product. Our findings reveal persuasion as the dominant channel: villages where persuasion was incentivized experienced significantly higher product sign-up and take-up rates, even without corresponding increases in financial literacy or product knowledge. Conversely, providing information alone had minimal impact. The combined intervention of persuasion and information delivered the highest outcomes, highlighting their complementary roles. These results highlight the critical importance of persuasion in driving behavioral change and suggest that information dissemination alone may often be insufficient for effective adoption and diffusion.
人类的行为和创新经常通过社交网络传播,然而推动这种传播的机制——信息共享还是说服——仍然存在争议。使用大规模的随机对照试验在北方邦,印度,我们检查这些动态,同时促进新引入的储蓄承诺产品。我们的研究结果表明,说服是主要的渠道:在鼓励说服的村庄,即使没有相应的金融知识或产品知识的增加,产品注册和接受率也显著提高。相反,仅提供信息的影响微乎其微。说服和信息的联合干预产生了最高的结果,突出了它们的互补作用。这些结果强调了说服在推动行为改变方面的关键重要性,并表明仅靠信息传播可能往往不足以有效地采用和传播。
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引用次数: 0
Causal Inference with Predicted Outcomes: Correcting prediction error bias in satellite-based impact evaluation 预测结果的因果推断:修正基于卫星的影响评估中的预测误差偏差
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-11-21 DOI: 10.1016/j.jdeveco.2025.103655
Johanne Pelletier , Mira Korb , Solomon Alemu , Manex B. Yonis , Travis J. Lybbert , Matthieu Stigler
Recent advances in Earth observation and machine learning open new frontiers in impact evaluation that appear well-suited for agricultural settings. We probe the nuances and limitations of these promising methods using satellite-predicted maize yields to measure the impact of Ethiopia’s Direct Seed Marketing (DSM) program, which was rolled out after 2011 to enhance farmer access to improved seed varieties. Machine learning-generated outcomes inevitably introduce prediction error, which attenuates coefficients and understates standard errors in downstream causal analysis. We find positive effects of DSM on crop cut maize yields, but weaker effects when using (naive) predicted yields. We demonstrate how ground-truth data can be leveraged to diagnose and correct this bias using tools from the prediction-powered inference literature — albeit with additional assumptions about unobservable prediction errors. Our corrected estimates suggest substantial DSM impacts on satellite-predicted maize yields in all producing areas and years.
地球观测和机器学习的最新进展为影响评估开辟了新的领域,似乎非常适合农业环境。我们利用卫星预测的玉米产量来衡量埃塞俄比亚种子直接营销(DSM)计划的影响,探讨了这些有前途的方法的细微差别和局限性。该计划于2011年后推出,旨在提高农民获得改良种子品种的机会。机器学习产生的结果不可避免地会引入预测误差,这会削弱下游因果分析中的系数并低估标准误差。我们发现DSM对作物减产玉米产量有积极影响,但当使用(naive)预测产量时,效果较弱。我们展示了如何利用基于预测的推理文献中的工具来诊断和纠正这种偏差——尽管对不可观察的预测误差有额外的假设。我们修正后的估计表明,DSM对卫星预测的所有产区和年份的玉米产量都有重大影响。
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引用次数: 0
Nutrition demand, subsistence farming, and agricultural productivity 营养需求、自给农业和农业生产力
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-11-19 DOI: 10.1016/j.jdeveco.2025.103681
Stepan Gordeev
In many of the poorest countries, agriculture is unproductive and subsistence farming is widespread. I propose nutrition demand as a mechanism that drives the production decisions of subsistence farmers and ultimately contributes to low aggregate agricultural productivity. I explore this mechanism in a model of farm-operating households facing explicit caloric needs and costly domestic trade, and test the model’s predictions on Malawian household-level data. In the model and in the data, the smallest farmers focus their consumption on obtaining calories and specialize their production in unsold staple crops; medium farmers diversify both their diet and their subsistence production; the largest farmers shift consumption to purchased goods by producing and selling marketable farm products. I quantify the aggregate implications of this farm-level product choice using the model. It suggests that lowering trade frictions enough for the average share of output sold by farmers to reach even 50% would make the country’s agricultural sector 47% more productive. Half of this increase is caused by the mechanically reduced erosion of output, and the other half by a better alignment of individual farmers’ product choice with their comparative advantage rather than their family’s nutritional needs or food preferences.
在许多最贫穷的国家,农业是非生产性的,自给农业很普遍。我认为营养需求是驱动自给农民生产决策的一种机制,并最终导致农业总生产力低下。我在一个农场经营家庭面临明确的热量需求和昂贵的国内贸易的模型中探索了这一机制,并在马拉维家庭层面的数据上测试了该模型的预测。在模型和数据中,最小的农民将他们的消费集中在获取卡路里上,并专门生产未售出的主要作物;中等农民使饮食和自给生产多样化;最大的农民通过生产和销售适销农产品,将消费转向购买商品。我用模型量化了这种农场级产品选择的综合影响。报告指出,降低贸易摩擦,使农民的平均销售份额达到50%,将使该国农业部门的生产率提高47%。这一增长的一半是由于机械地减少了产出的侵蚀,另一半是由于农民个人的产品选择与他们的比较优势更好地结合在一起,而不是他们家庭的营养需求或食物偏好。
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引用次数: 0
Inter-group contact and national identity: Evidence from Hong Kong and Macau students in the mainland of China 族群间接触与民族认同:来自中国内地港澳学生的证据
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-09-02 DOI: 10.1016/j.jdeveco.2025.103625
Zehui Li , Haoye Liao , Sen Ma , Junjie Qiu , Sen Xue
We leverage exogenous mixed-dormitory room assignments between Hong Kong/Macau (HM) students and mainland Chinese students at a Chinese university to investigate intergroup contact's effects on national identity. We find that mixed-room experience significantly enhances the national identity with China for both HM and mainland students. The heterogeneous analysis suggests that for HM students, the national identity rises more when paired with culturally proximate mainland peers (Cantonese speakers), and for mainland students, their national identity is bolstered when living with relatively low economic status HM peers. Additionally, mixed-room experience increases the mainland Chinese media usage and the preference for working in the mainland of China after graduation for HM students.
我们利用一所中国大学的香港/澳门(HM)学生和中国大陆学生之间的外生混合宿舍房间分配来调查群体间接触对国家认同的影响。我们发现,混合房间的体验显著增强了HM和大陆学生对中国的民族认同。异质分析显示,与文化相近的大陆同胞(广东话同胞)交往时,香港学生的国家认同会上升,而与经济地位相对较低的香港同胞生活时,内地学生的国家认同会增强。此外,混合房间的体验增加了HM学生对中国大陆媒体的使用和毕业后在中国大陆工作的偏好。
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引用次数: 0
Allocative implications of government investment in private sector 政府对私营部门投资的配置影响
IF 4.6 1区 经济学 Q1 ECONOMICS Pub Date : 2026-02-01 Epub Date: 2025-09-01 DOI: 10.1016/j.jdeveco.2025.103616
Lili Lian , Jingyi Zhang
In China, state owners make minority equity investments in private firms. We study the allocative implications of such government investments using a two-sector DSGE model with financial friction and idiosyncratic productivities. In our model, private owners are more productive than state owners but face tighter financial constraints. Equity investment by a state owner alleviates the private owner’s financial constraint but dampens its own productivity, consistent with Chinese firm-level data. Under this setup, only private owners with sufficiently high productivity accept such investment, while only state owners with sufficiently low productivity make such investment. As a result, expansion of such government investment improves capital allocation within each sector and across sectors. Our analysis shows that financial liberalizations, including liberalizing interest-rate controls and reducing the loan-to-value gap between sectors, stimulate private owners’ demand for such government investment but discourage state owners from making it, thus generating an ambiguous effect on aggregate productivity.
在中国,国有企业对私营企业进行少数股权投资。我们使用具有金融摩擦和特殊生产率的两部门DSGE模型研究了此类政府投资的配置含义。在我们的模型中,私人业主比国有业主生产率更高,但面临更严格的财务约束。国有企业的股权投资减轻了私营企业的财务约束,但抑制了其自身的生产率,这与中国企业层面的数据一致。在这种情况下,只有生产率足够高的私人所有者才会接受这种投资,而生产率足够低的国有所有者才会进行这种投资。因此,这种政府投资的扩大改善了各部门内部和跨部门的资本配置。我们的分析表明,金融自由化,包括放开利率控制和减少部门之间的贷款与价值差距,刺激了私人所有者对此类政府投资的需求,但阻碍了国有所有者进行此类投资,从而对总生产率产生了模糊的影响。
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引用次数: 0
期刊
Journal of Development Economics
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