His research interests include tobacco control policy, smoking cessation, adolescent smoking prevention, and implicit attitudes toward smoking. He is principal investigator on a study testing contingency management as a strategy to reduce smoking among pregnant women and co-investigator on an NIH-funded 35-year longitudinal study of smoking attitudes and behaviors. He received a PhD in health behavior from Indiana University, an MPH in international health from Emory University, and a BA in economics from DePauw University.