Documents et rapports
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From Chalkboards to Chatbots : Evaluating the Impact of Generative AI on Learning Outcomes in Nigeria (anglais)
This study evaluates the impact of a program leveraging large language models for virtual tutoring in secondary education in Nigeria. Using a randomized controlled trial, the program deployed Microsoft...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11125 Date du document: 19 mai 2025 Mode de publication: Disclosed Auteur: De Simone, Martin Elias,Tiberti, Federico Hernan,Barron Rodriguez, Maria Rebeca,Manolio, Federico Alfredo,Mosuro, Wuraola,Dikoru, Eliot Jolomi
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Access to Finance for MSMEs in Ecuador: A Firm-Level Impact Evaluation (anglais)
This paper studies the impact of a World Bank program aimed at promoting access to finance for micro, small, and medium-size enterprises in Ecuador. A staggered difference-in-differences method is used...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11121 Date du document: 13 mai 2025 Mode de publication: Disclosed Auteur: Bruhn, Miriam,Diaz Kalan, Federico Alfonso,Fraccaroli, Nicolo,Ruiz Ortega, Claudia
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Mitigating the Impact of Household Expropriation on Female Entrepreneurship : Experimental Evidence from Ghana (anglais)
How do intrahousehold dynamics affect the investment of female entrepreneurs? This paper presents findings from a randomized controlled trial in Ghana that assesses the impacts of four alternative support...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11111 Date du document: 2 mai 2025 Mode de publication: Disclosed Auteur: Campos, Francisco Moraes Leitao,Conconi,Adriana,Davies, Elwyn,Gassier, Marine,Goldstein, Markus
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Certified to Stay ? Long-Run Experimental Evidence on Land Formalization and Widows’ Tenure Security in Benin (anglais)
In settings where women’s land rights are informal, the death of a husband can severely limit a widow’s access to land and her ability to remain in her home — especially in the absence of a male heir...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11102 Date du document: 17 avril 2025 Mode de publication: Disclosed Auteur: Botea, Ioana Alexandra,Goldstein, Markus,Houngbedji,Kenneth,Kondylis, Florence,O'Sullivan, Michael B.,Selod, Harris
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TV, TEDx, and Tweets: Measuring the Impacts of a Multi-Pronged Edutainment Program in the Kyrgyz Republic and Tajikistan (anglais)
The evidence so far is mixed as to whether educational entertainment (or “edutainment”) can create sustainable changes in financial attitudes and behaviors, and few studies have tested such hypotheses...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11088 Date du document: 21 mars 2025 Mode de publication: Disclosed Auteur: Fowler,Ben,Heitzig, Christopher Joseph,Khan,Marrium,Pai, Renuka,Varma, Sakshi
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Impacts and Spillovers of a Low-Cost Multifaceted Economic Inclusion Program in Chad (anglais)
This study analyzes the direct effects and local spillovers of a low-cost multifaceted economic inclusion program through a randomized controlled trial in Chad. The intervention included group savings...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11084 Date du document: 12 mars 2025 Mode de publication: Disclosed Auteur: Premand, Patrick,Schnitzer, Pascale
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Seeds of Change : The Impact of Ethiopia’s Direct Seed Marketing Approach on Smallholders’ Seed Purchases and Productivity (anglais)
Several factors contribute to the limited use of improved seed varieties in Ethiopia. Among those, on the supply side, is the restricted availability of seeds in the volume, quality, and timeliness required...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11078 Date du document: 3 mars 2025 Mode de publication: Disclosed Auteur: Mekonnen, Dawit Kelemework,Abate,Gashaw T.,Yimam,Seid,Benfica,Rui,Spielman,David J.,Place,Frank
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Effects of a Community-Driven Water, Sanitation, and Hygiene Intervention on Diarrhea, Child Growth, and Local Institutions : A Cluster-Randomized Controlled Trial in Rural Democratic Republic of Congo (anglais)
Diarrhea and growth faltering in early childhood reduce survival and impair neurodevelopment. This paper assesses whether a national program in the Democratic Republic of Congo reduced diarrhea and stunting...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11070 Date du document: 19 février 2025 Mode de publication: Disclosed Auteur: Quattrochi, John P,Croke,Kevin,Dohou, Caleb Jeremie,Stanus Ghib, Luca,Lokaya, Yannick Bokasola,Coville, Aidan,Mvukiyehe,Eric
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Does Free Sound Too Cheap ? The Adverse Effect of a Randomized Text Message Campaign on Program Take-up (anglais)
This study conducted a randomized experiment to improve participation in a youth employment program in Côte d'Ivoire by testing text message outreach methods. Sending text messages highlighting that the...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11063 Date du document: 11 février 2025 Mode de publication: Disclosed Auteur: Annan,Jeannie,Koussoube, Mousson Estelle Jamel,Tassy, Josephine,Rouanet, Lea Marie,Delavallade, Clara,Evans,David
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Lying to the Taxman or Accepting a Helping Hand ? Evidence from a Novel Experiment on SMEs in Tanzania (anglais)
This paper presents the results from a novel field experiment that examined the impact of in- creasing the presence of revenue authority officers on tax compliance and tax morale among small and medium-size...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11062 Date du document: 10 février 2025 Mode de publication: Disclosed Auteur: Paul, Revocatus Washington,Mdee,Ephraim,Fimbo,Massaga,Karver, Jonathan George,Chaudhry, Zain,Hoy, Christopher Alexander
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Working for Yourself or for Your Kids ? Childcare Expansion Policy in Uzbekistan (anglais)
In developed countries, public childcare programs have increased maternal employment by easing time constraints. However, their impact in lower-middle-income settings with multigenerational households...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11038 Date du document: 15 janvier 2025 Mode de publication: Disclosed Auteur: Abdurazzakova, Dilnovoz,Niu, Chiyu,Purevjav, Avralt-Od
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Conserving Wildlife through Demand Reduction and Supply Alternatives : Two Experiments in Restaurants in Kinshasa (anglais)
High aggregate levels of wildlife consumption in Central African cities may be depleting wildlife populations. This study explores the impacts of demand and supply-side interventions on wild meat consumption...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS11016 Date du document: 7 janvier 2025 Mode de publication: Disclosed Auteur: Cisse,Abdoulaye,Englander, Gabriel,Ingram,Daniel J.
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Local Knowledge, Formal Evidence, and Policy Decisions (anglais)
How do policymakers value advice from local experts versus formal evidence from impact evaluations when making policy decisions? Using a discrete choice experiment conducted in collaboration with the World...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10994 Date du document: 9 décembre 2024 Mode de publication: Disclosed Auteur: Vivalt, Eva,Coville, Aidan,KC,Sampada
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Can Facebook Ads Prevent Malaria ? Two Field Experiments in India (anglais)
This study uses a cluster randomized controlled trial to evaluate the impact of a nationwide malaria prevention advertising campaign delivered through social media in India. Ads were randomly assigned...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10967 Date du document: 5 novembre 2024 Mode de publication: Disclosed Auteur: Donati,Dante,Rao,Nandan,Orozco Olvera, Victor Hugo,Munoz Boudet, Ana Maria
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Using Post-Double Selection Lasso in Field Experiments (anglais)
The post-double selection Lasso estimator has become a popular way of selecting control variables when analyzing randomized experiments. This is done to try to improve precision, and reduce bias from attrition...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10931 Date du document: 26 septembre 2024 Mode de publication: Disclosed Auteur: Cilliers,Jacobus,Elashmawy, Nour,McKenzie, David
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Learning When Schools Shutdown : Impacts of H1N1 Outbreak on Learning Loss and Learning Gaps (anglais)
This paper contributes to the growing body of evidence on the effects of school closures on learning outcomes, focusing on a recent event in a developing country. During the 2009 H1N1 pandemic outbreak...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10879 Date du document: 26 août 2024 Mode de publication: Disclosed Auteur: Amorim,Vivian,Piza, Caio,Lautharte Jr.,Ildo José
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The Fertility Impacts of Development Programs (anglais)
This paper examines how women’s fertility responds to increases in their earnings and household wealth, using six experiments conducted in Sub-Saharan Africa. Contrary to predictions that an increase in...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10848 Date du document: 10 juillet 2024 Mode de publication: Disclosed Auteur: Donald, Aletheia Amalia,Goldstein, Markus,Koroknay-Palicz, Tricia,Sage, Mathilde
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Therapy, Mental Health, and Human Capital Accumulation among Adolescents in Uganda (anglais)
Using a cluster-randomized trial, this paper evaluates the impact of group-based interpersonal therapy on mental health and human capital accumulation among adolescent girls in Uganda who were at risk...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10849 Date du document: 10 juillet 2024 Mode de publication: Disclosed Auteur: Baird,Sarah,Ozler, Berk,Dell'Aira, Chiara,Parisotto,Luca,Us-Salam,Danish
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How Culturally Wise Psychological Interventions Help Reduce Poverty (anglais)
Poverty is multidimensional, associated not only with a lack of financial resources, but also often social-psychological constraints, such as diminished agency and aspirations. Through a series of field...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10824 Date du document: 26 juin 2024 Mode de publication: Disclosed Auteur: Thomas,Catherine,Premand, Patrick,Bossuroy, Thomas,Sambo,Soumaila Abdoulaye,Markus,Hazel,Walton,Gregory
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Private Provisioning of Employment Services : Experimental Evidence from Bosnia and Herzegovina (anglais)
This paper examines the effect of compensating a private sector provider of employment services for successful placement of jobseekers with employers. Within this program, active job matching, relative...
Type de document: Document de travail de recherche sur les politiques Numéro du rapport: WPS10826 Date du document: 26 juin 2024 Mode de publication: Disclosed Auteur: Balavac-Orlic,Merima,John T. Giles,Siddharth Hari,Mirey Ovadiya