プラットフォーム理論
ネットワーク外部性
Katz, M. L., & Shapiro, C. (1985). Network externalities, competition, and compatibility. The American economic review, 75(3), 424-440.
Katz, M. L., & Shapiro, C. (1986). Technology Adoption in the Presence of Network Externalities. Journal of Political Economy, 94(4), 822-41.