The field of behavioral economics acknowledges that humans are not rational decision makers, and may need “nudges” to incentivize improvements in their health behaviors. Professor Omar Galárraga uses tools from behavioral economics to nudge those at highest risk of HIV infection toward healthier behaviors, like safer sex and the use of Pre-Exposure Prophylaxis (PrEP) antiviral medication. On August 16, 2023, Dr. Galárraga sat down with Megan Hall, MPH’15, to discuss his successful behavioral economics work in Mexico and his decades of advocacy for national HIV prevention programs. Listen to their discussion on the Brown University Humans in Public Health podcast.