Professor Nicolas de Roos is a visiting researcher at ZEW’s Research Group "Competition and Regulation" from 21 July to 29 September 2017. He is an associate professor with the School of Economics at the University of Sydney in Australia. His research interests focus on industrial organisation, applied microeconomic theory and dynamic models. During his stay, he studies tacit initiations of collusions in the retail market for gasoline in Perth, Western Australia. Furthermore, he concentrates on developing a model of collusion in which consumers have limited ability to compare rival products. Here he examines the strategic incentives for firms to engage in obfuscation. Nicolas de Roos will hold a ZEW Research Seminar on equilibrium selection in the retail gasoline industry. His research results inform the theory of collusion, with particular relevance for the initiation of collusion and equilibrium selection.