AEA RCT Registry currently lists 12407 studies with locations in 171 countries.
While much attention has been dedicated to the health and well-being of children under 5, the needs of older children have been historically overlooked. However, children between 5- and 14-years face health-related challenges higher than previously realized, during a period of life critical for physical, psychological, cognitive and social development. In Zambia, the context for this study, the prevalence of malaria is highest in children aged 5-17, with 40% of children testing positive in endemic areas; a study based in Lusaka, the capital also reported high levels of morbidity in primary school children, with 35% reporting febrile symptoms in the past two weeks, 66% reporting cough, 25% reporting diarrhea, and 32% having worms in their stool. Many of these problems are caused or compo...
The aim of this study is to examine how general practitioners make decisions when evaluating ambiguous clinical scenarios. In particular, the research focuses on how information provided by third-party sources may influence clinical judgment and decision-making. The study involves approximately 500 general practitioners in Italy and uses a controlled experimental design based on standardized clinical vignettes. Participants are presented with a series of clinical cases that vary in terms of contextual information and the presence of additional decision-support material. Clinical decisions are assessed through probabilistic judgments and behavioral choices, such as requests for further investigations or referrals. Overall, the study aims to better understand the factors that shape clinic...
This research project examines local ties and the electoral success of mayoral candidates in local elections. We employ a conjoint survey experiment on electoral candidate preferences among voting-age residents (18-75 years) in Germany. Fielded by a German survey institute, the survey aims to quantify voters’ relative preferences for mayoral candidate attributes, with a particular focus on locality markers in local elections. We conceptualize local identity as a multidimensional construct encompassing ascribed (birthplace), achieved (length of residence), and performative (local civic engagement) dimensions, which are experimentally varied in the conjoint design. The study examines how these dimensions shape perceptions of candidates as members of the local in-group and, more broadly, h...
Recent advancements in Generative AI (GenAI) have the potential to significantly enhance productivity and reshape workflows. A critical debate in exposed industries is whether GenAI should primarily be deployed as a labor-augmenting copilot, or as an autonomous agent that directly substitutes for human workers. In practice, jobs are typically designed as task bundles to balance specialization gains against coordination costs. Therefore, evaluating GenAI as an autonomous worker requires assessing not only its performance on isolated tasks, but also its ability to handle a multi-task bundle. To study this topic, we collaborate with a leading customer service company. Customer service is a typical multi-task job, comprising a bundle of tasks ranging from product consultation to personalize...
Job seekers cannot easily verify what an employer is actually like before applying, and few platforms provide credible signals about employer quality. This trial evaluates the effect of disclosing verified, positive peer testimonials about employers on job seekers' search behavior on an online job-search platform in Mexico. All candidates active on the platform during the trial window are eligible for randomization, which occurs at the individual level via a deterministic hash of the candidate identifier. Candidates are assigned in a 1:1:1 ratio to control (standard platform experience), a testimonial arm emphasizing respectful treatment by the employer, and a testimonial arm emphasizing the employer's compliance with pay and benefit terms; testimonials are shown only on a pre-selected ...
Although indigenous communities inhabit nearly eighty percent of the world’s richest biodiversity hotspots, their role in promoting biodiversity conservation has received little systematic study. Many indigenous communities that coexist with predator species embrace “live-and-let-live” philosophies, avoiding confrontation even in the face of livestock or crop losses. Their belief systems often frame local flora and fauna as divine incarnations that command reverence and protection. One such population are the Rabari herders of Rajasthan in India, whose belief in the divine nature of leopards has contributed to their homelands supporting one of the highest leopard densities in the world. Using a lab-in-field experiment, herders' ambiguity aversion for both predation events and an art...
Children in Malawi face high rates of malnutrition and are at risk of not reaching their developmental potential. Community-based childcare centres (CBCCs) can be cost-effective platforms for scaling-up early childhood development (ECD) and nutrition social behaviour change (SBC) interventions. However, evidence also suggests potential synergies from coupling nutrition SBC with cash transfers (CT), given that rural households in Malawi face high levels of poverty and recurring extreme lean season food-security shocks. The Maziko trial is aimed at evaluating the effectiveness and cost-effectiveness of using CBCCs and parenting care groups as platforms to improve maternal diets and child nutrition and development by providing nutrition-sensitive SBC and CT intervention packages in communi...
Plant-based defaults are widely touted as a scalable, sustainable solution for increasing uptake of plant-based foods. However, defaults are not a singular thing; their designs can be varied to make opting out more or less difficult, or they can be accompanied by persuasive text that promotes the change to choice architecture to participants' conscious awareness. This experiment -- a collaboration between researchers at Stanford, the University of Exeter, and the nonprofit Greener By Default -- compares four plant-based defaults in an online context on two dimensions: how much they increase uptake of plant-based food and how much reactance they engender (re: how much they annoy people). We will test four plant-based defaults in the setting of a hypothetical catered lunch to see which pe...
The experiment is conducted by the Norwegian Ministry of Finance. It draws a random population of 8 percent, approximately 100 000 individuals, in the age 20-35 in 2026 (born 1991- 2006) who where registered as tax payers in 2025. Selected individuals receive a tax credit on labor income equal to a maximum of 125 000 NOK. The credit lowers taxes paid by up to 27 500 NOK. The credit is phased out starting at 345 000 NOK and is fully phased out at 657 500 NOK. The credit will be given for 5 years. The experiment design is based on simulations executed by The Frisch Centre and Norwegian Fiscal Studies at the University of Oslo. The experiment is designed to assess whether a tax credit on labor income can induce young individuals outside the work force to increase labor supply. We ...
This pre-registration outlines a randomized controlled trial testing whether stress constrains information acquisition among 1,200 low-income parents of kindergarteners in Mumbai. The experiment implements a 2x2 factorial design: parents receive either (i) a stress-relief breathing routine (with a tactile bracelet cue) or a bracelet-only control condition, and (ii) daily curiosity prompts that vary in signal precision---high-precision prompts elicit bounded, verifiable responses (e.g., counting, binary choices), while low-precision prompts require open-ended interpretation (e.g., ``why'' or ``how'' questions). This design isolates whether stress disproportionately impairs the processing of ambiguous signals. I pre-register four confirmatory hypotheses on emotional regulation, belief upd...