Martin Mattsson is an Assistant Professor in the Department of Economics at the National University of Singapore and an affiliate of J-PAL and CEPR.

His research focuses on how to improve government institutions and public policy. A lot of his research takes place in Bangladesh, where he has completed three large-scale field experiments. He also works on projects using non-experimental methods and data from other countries such as India, Pakistan, Vietnam, and Brazil, and some of his work uses cross-country data.

A central part of his current research agenda is aimed at reducing the harms of air pollution in South Asia, combining empirical evidence with a focus on practical, scalable policy solutions.

He mainly works on projects that, if successful, could have large positive welfare impacts. Some of his work is inspired by Effective Altruism (EA), and he teaches a course on EA at NUS.