During the COVID-19 pandemic, the introduction of mandatory face mask usage was accompanied by a heated debate. It was argued that community use of masks creates a false sense of security that could decrease social distancing, thus making matters worse. We conducted a randomized field experiment...

We evaluate the effects of different marketing and distribution techniques on the purchase of Long-Lasting Insecticide-Treated Nets (LL-ITN). Using a randomized controlled trial in urban Senegal, we look at the impacts of receiving information on malaria-related issues and of different sale...

This paper examines weight loss and the formation of healthy habits through cash rewards in the context of a multi-phase randomized controlled trial involving 700 obese individuals. We find effects of monetary incentives for weight loss of up to EUR 300 on body weight during all experimental...

We show that limited attention and present bias contribute to low levels of exercise. First, in a large randomized experiment, we find that email reminders increase gym visits by 13 % and that they benefit nearly all types of individuals. Limited attention can explain these effects. Second,...

We report the results of a randomized controlled trial testing whether incentivizing physical exercise improves the academic performance of college students. As expected, the intervention increases physical activity. The main result is that it generates a strong and significant improvement in...

This study investigates the effectiveness of dynamic norm nudges in promoting second-dose HPV vaccinations among trendsetters-parents who initiated the firstdose HPV vaccine for their daughters between 2017-2020. Utilizing administrative data from Bogota's Secretariat of Health in a field...

Iran has the world's only government-regulated kidney market. We report the results of the first field study of donor behaviour in this unusual market. Participants have lower risk tolerance and higher patience levels than the Iranian average but display no difference in rationality from...

We use a field experiment to investigate the effect of incentives on food purchase decisions at a grocery store. We recruit over 200 participants and track their purchases for a period of 6 months, permitting us a glimpse of more than 3,500 individual shopping trips. We randomize participants to...

Little is known about the effectiveness of information strategies on energy conservation in developing countries. In this study, we conduct a field experiment in an apartment complex in India to test how information about electricity usage impacts the electricity consumption of urban middle...

This is an online appendix to Lacetera, N., Macis, M., and Slonim, R., 2013: “Rewarding Volunteers? A Field Experiment“ (Management Science, forthcoming). It contains the following materials: (1) Additional Details of the Experimental Design (pp. i-iii), and (2) Additional Analyses (pp....