Mobarak has several ongoing research projects in Bangladesh, Nepal, and Sierra Leone. He conducts field experiments exploring ways to induce people in developing countries to adopt technologies or behaviors that are likely to be welfare-improving. He also examines the complexities of scaling up development interventions that are proven effective in such trials. For example, he is scaling and testing strategies to address seasonal poverty using migration subsidies or consumption loans in Bangladesh, Nepal, and Indonesia. His research has been published in journals across disciplines, including Science, Nature, Econometrica, American Economic Review, Review of Economic Studies, BMJ, the American Political Science Review, PNAS, Marketing Science, and Demography, and covered by the New York Times, The Economist, NPR, BBC, NBC, The Washington Post, Wall Street Journal, Science, Nature, and other media outlets around the world. He received a Carnegie Fellowship in 2017 and was named to the inaugural Vox list of 50 “scientists working to build a more perfect future” in 2022.
Mobarak collaborated with the government of Bangladesh and other institutions to devise evidence-based COVID-19 response strategies in 2020. He collaborated with governments and NGOs in India, Pakistan, Nepal, and Bangladesh to distribute facemasks to over 100 million people during the Delta and Omicron waves in 2021, based on the results of the NORM model. He began collaborating with the government of Sierra Leone on vaccine distribution in 2022 and set up an institutional partnership with WHO in 2023 to work on behavioral sciences for public health in Jamaica, Sierra Leone, and other WHO member states.