Consumer multi-homing is considered to be critical for competition policy regarding digital platforms. To assess the role of consumer multi-homing in competition policy toward platforms, we develop a new framework that embeds consumer multi-homing in two-sided market into the otherwise standard...

Firms in traditional markets often compete in output à la Cournot. In this paper, we consider Cournot competition between platforms in a two-sided market. We find that the markup and markdown terms are distorted toward zero for greater levels of platform competition and for greater levels of...

Evaluating network effects and two-sidedness is critical for merger control in the digital economy.To examine the impact of network effects on the welfare properties of mergers, this study analyzes a model of multiproduct-firm oligopoly with firm-level direct and indirect network externalities...