Paul is Chair in Behavioral and Competition Economics, Düsseldorf Institute for Competition Economics (DICE), Heinrich-Heine University Düsseldorf, Germany.

Paul worked on numerous topics in Industrial Organization and Competition Policy such as input-market bargaining power, merger control, and collusion. More recently, much of his work focuses on the functioning of markets when consumers are partly driven by psychological factors – such as social preferences, loss aversion, time-inconsistency, or naivete – that the classic consumer model abstracts from. Among other things, he has written on how firms optimally price products and design credit contracts in response to consumers’ psychological tendencies, and he has investigated the implications of various consumer mistakes for the functioning of markets and for consumer-protection regulation.

Paul is a member of the Academic Panel of the Competition and Markets Authority of the UK, a member of the Arbeitskreis Kartellrecht of the German Antitrust Authority (Bundeskartellamt), a Research Fellow of the CEPR Programme in Industrial Organization, a Research Fellow of the CESifo Network in Behavioral Economics, and an elected member of the Industrieökonomischer Ausschuss as well as the Theoretischer Ausschuss of the Verein für Socialpolitik. His work appeared in leading academic journals such as the American Economic Review, Econometrica, the Quarterly Journal of Economics, and the Review of Economic Studies.

Ginger Zhe Jin is currently Neil Moskowitz Professor of Economics at the University of Maryland, College Park. She served as the Director of the FTC Bureau of Economics from January 2016 to July 2017, and Amazon Scholar and Senior Principal Economist at Amazon.com from January 2019 to May 2020.

Most of her research focuses on information asymmetry among economic agents and how to provide information to overcome the information problem. The applications she has studied include retail food safety, health insurance,  prescription drugs, e-commerce, regulatory inspection, scientific innovation, air quality, blood donation, vaccination, intrafamilial interaction, data regulation, and consumer protection. Her research has been published in leading economics, management and marketing journals, with support from the National Science Foundation, the Net Institute, the Alfred P. Sloan Foundation, and the Washington Center for Equitable Growth. Many of her works have been covered by major media outlets including Wall Street Journal, New York Times, Forbes, Bloomberg, and Los Angeles Times.

She is currently a managing editor of the International Journal of Industrial Organization, advisory council member of Journal of Industrial Economics, and board member of Industrial Organization Society. She has been Research Associate of NBER since 2012.

In October 2014, she co-founded Hazel Analytics, an analytics company that promotes the use of open government data. In February 2025, she became a Senior Consultant to Compass Lexecon.

She received her PhD in Economics from UCLA in 2000.