农业中的社会学习: 一种可扩展的奶农对奶农推广方法
Social learning in agriculture: A scalable farmer-to-farmer extension approach for dairy farmers
Journal of Development Economics · 2026 · [{"name": "Luc Behaghel", "affiliation": ["Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement", "Paris School of Economics"]}, {"name": "Jérémie Gignoux", "affiliation": ["Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement", "Paris School of Economics"]}, {"name": "Karen Macours", "affiliation": ["Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement", "Paris School of Economics"]}]
中文摘要
我们评估了一项针对乌干达小规模奶农的农民培训干预，结果表明"联系农民"推广模式的规模化版本能够显著提高牛奶产量，且具有成本效益。在该模式下，每个村庄选出一名"农民培训员"并对其进行培训，使其向其他农民传播知识。利用实验性子处理组，并结合观测数据与自报数据，我们评估了旨在增强项目影响的三个关键组成部分：(i) 为农民培训员提供非货币激励；(ii) 来自专业推广人员的支持；(iii) 将动物营养与技术选择的关键原则同一整套广泛的饲喂实践相结合的课程。结果显示，沿着假设的因果链条——从农民培训员的知识获取，到其所培训农民的知识提升，再到这些农民技术采用、产量和利润的增加——均产生了正向影响。
Abstract
We evaluate a farmer training intervention for smallholder dairy farmers in Uganda, demonstrating that an at-scale version of the “contact farmer” extension model can significantly increase milk production and be cost-effective. In this model, one “farmer trainer” is selected per village and trained to disseminate knowledge to other farmers. Using experimental sub-treatment arms, and a combination of observed and self-reported data, we assess three key components designed to enhance the program’s impact: (i) non-monetary incentives for farmer trainers, (ii) support from professional extension agents, and (iii) a curriculum that combines key principles of animal nutrition and technology choice with a broad set of feeding practices. Results show positive impacts along the hypothesized causal chain, from knowledge acquisition by farmer trainers to knowledge of the farmers they train, and increases in their technology adoption, production, and profits.