Using two-sided markets as a specific market context, we show that cross-group network effects can turn the participants of a two-sided network into critical resources. In two-sided markets such as payment cards and personal computer operating systems, two groups of agents interact with each...

Google has been a dominant search engine in the US and Europe for several years, but it has little market share in South Korea. South Korea's largest portal Naver has been dominant due to its large database of answers from its successful knowledge-sharing service. This research asks when and to...