With the rise of the Internet economy, an increasing number of firms are offering their core products through online platforms, but retail add-ons directly to consumers. Meanwhile, many online platforms have also started adopting the agency (model) contract, where the upstream firms decide the...

This paper examines a monopoly platform's two-sided pricing strategies in a setting with seller competition, which gives rise to not only positive cross-side network effects between buyers and sellers, but also a negative same-side network effect among sellers. We show that platform pricing...