Hanna Halaburda is Associate Professor of Technology, Operations and Statistics at the Stern School of Business at New York University, USA. Previously, she was on an assistant professor at Harvard Business School, USA; a visiting scholar at Columbia University, USA; and a senior economist at the Bank of Canada. Her research specializes in the economics of digital currencies, platform competition, and the impact of technology on firms' strategy. Miklos Sarvary is the Carson Family Professor of Business at Columbia Business School, USA, where he serves as Faculty Director of the Media and Technology Program. Previously, he was on the faculty at Stanford University, USA; Harvard University, USA; and INSEAD. His research has focused on information and news markets, social network competition and, more recently, online advertising effectiveness.Guillaume Haeringer is Associate Professor at the Zicklin School of Business at Baruch College, USA.Previously he was visiting faculty at Stanford University, USA; on the faculty at the Universitat Autònoma de Barcelona, Spain; lecturer at the University of Warwick, UK. His research focuses on market design, matching theory, game theory and the economics of cryptocurrencies.