This podcast episode tells the story of how a young woman named Carol Nakasa became involved in a development revolution in Busia, Kenya, through her data entry work for a research project, and how economist Michael Kremer pioneered the use of randomized controlled trials (RCTs) to study development problems in Busia. The episode also discusses the impact of RCTs on development economics, including the surprising results of a study on the impact of textbooks on education in Busia, and the ethical considerations of conducting studies on medical interventions. The episode concludes with the transformative impact of RCTs in addressing global poverty, highlighting the groundbreaking work of economists like Michael Kremer, Esther Duflo, and Abhijit Banerjee in shaping economic policies and interventions aimed at alleviating global poverty.