Hannes Ullrich is Research Associate in the Department Firms and Markets at the DIW Berlin and Associate Professor of Economics at the University of Copenhagen. He is also a Senior Research Associate at the Department of Business Administration at the University of Zurich, CESifo Research Affiliate, and Fellow at the Berlin Centre for Consumer Policies (BCCP). Hannes is an applied microeconomist with research interests in empirical industrial organization, health economics, and personnel economics. His work has been published in The Economic Journal, Management Science, and the Journal of Health Economics. He holds a Starting Grant from the European Research Council for research on antibiotic prescribing and resistance.