His research focuses on international economics and contract theory. Tomasz is particularly interested in the effect of different barriers hindering international exchange. He has worked on various topics such as financial intermediation in international trade, industry location patterns, consequences of international portfolio allocation under risk and ambiguity or exchange rate determination. His research was published in journals such as Journal of Financial Economics, Review of Economics and Statistics, the Review of Financial Studies.
At HEC Paris, Tomasz teaches courses in Macroeconomics and International Economics in the Grande Ecole and various Master programs. In the past, he also taught courses in Microeconomics and Offshoring.