This study explores the question of how alliance portfolios change over time. In the setting of the U.S. wireless gaming market, I collected real-time and longitudinal data on entrepreneurial game publishers over two and a half years. This process revealed that alliance portfolios of firms can...

This chapter focuses on the largely unexplored within- and cross-category spillovers between category kings and commoners within the field of the sharing economy. Going beyond the reputational spill-overs that are the main focus of extant literature, the authors also consider spill-overs in...