数字信息提供与行为改变：来自东非六项实验的启示
Digital Information Provision and Behavior Change: Lessons from Six Experiments in East Africa
American Economic Journal: Applied Economics · 2024 · [{"name": "Raissa Fabregas", "affiliation": ["The University of Texas at Austin"]}, {"name": "Michael Kremer", "affiliation": ["University of Chicago"]}, {"name": "Matthew Lowes", "affiliation": []}, {"name": "Robert On", "affiliation": ["National Health Insurance Fund"]}, {"name": "Giulia Zane", "affiliation": ["International Water Management Institute"]}]
中文摘要
尽管有研究表明，基于手机的信息项目能够改变行为，但另一些研究则未发现此类效应。我们评估了六项短信农业推广项目，共覆盖128,000名农民。荟萃分析发现，采纳推荐做法的优势比增加到1.22倍（95%置信区间：1.16，1.29）。我们无法拒绝各实验影响相似这一假设。重复发送信息会提高影响，但提供更细粒度的信息、采用行为框架，或以电话辅助短信则不会。几乎没有证据表明存在信息疲劳或挤出效应。尽管绝对影响幅度不大、仅在大样本或荟萃分析中才能被检测到，但短信成本足够低廉，因而具有成本效益。
Abstract
While some studies suggest mobile phone–based information programs change behavior; others find no effect. We evaluate six text message agricultural extension programs, collectively covering 128,000 farmers. A meta-analysis finds a 1.22-fold increase in the odds of adoption of recommended practices (95 percent CI: 1.16, 1.29). We cannot reject similar impacts across experiments. Impacts are increased by message repetition, but not by providing more granular information, using behavioral framings, or complementing texts with phone calls. There is little evidence of message fatigue or crowd-out. Despite modest absolute impacts detectable only with large samples or meta-analysis, texts are inexpensive enough to be cost-effective. (JEL D83, D91, L96, O13, Q12, Q16)