Dennis Gaus is working on his doctorate at the DIW Graduate Center under the supervision of Georg Hirte (TU Dresden) since completing his Master's degree in Applied Economics in 2017 (University of Innsbruck, semesters abroad in Toronto and Taipei). His interests and research focus lie in the areas of transport economics and empirical industrial economics. In his dissertation he investigates the economic effects of quality and (insufficient) maintenance of transport infrastructure on firms and regions based on production function approaches, accessibility indicators and methods of spatial econometrics. Since 2019, he is also a research associate in the research area of Transportation Research Team and involved in various DIW and third-party funded research projects. In these, he is particularly concerned with infrastructure costs in railway operations (direct costs of train operation) as well as the effects of pricing policy measures on individuals' choice of transport mode.