Vertizontal Price Competition Between Social Media Platforms Author

What is it about?

We model price competition between two horizontally differentiated social media platforms, each offering basic and premium services. Users are either platform-anchored or quality-anchored. The platforms are two-sided, with users and advertisers as the two sides. We find a unique and symmetric equilibrium in the pricing game, where platforms earn revenue from both sides. As the quality difference increases, premium service prices rise, while basic service prices drop. Users are subsidized under strong network effects, but the platforms do not subsidize users if they are sufficiently differentiated. Vertical differentiation increases platform profits if sufficient quality difference is achieved for a given marginal cost of serving the premium users. Higher differentiation is required if the share of premium-anchored users increases. The extended model examines the effect of advertiser multihoming on subscription fees and profits. This model explains the pricing and service strategies of platforms like LinkedIn, X (Twitter), and Instagram.

Featured Image

Why is it important?

Our results provide pricing guidelines for managers in competitive social media platforms. A larger quality gap between basic and premium services allows platforms to charge more for premium while keeping the subscription fee low (or subsidized) in the basic segment to retain scale and attract marginal users. Subsidies should be used only when network effects are strong. If the platforms are sufficiently differentiated, they can compete on value rather than subsidize the users. Finally, upgrading the premium service is profitable only when the added quality is large relative to the marginal cost of serving the premium users; if costs rise (e.g., verification, moderation), managers should be selective with premium features and protect margins, especially when the user base contains a larger share of premium-anchored users. Our analysis suggests that competition policy in differentiated two-sided platform markets should interpret observed price patterns through the lens of platform differentiation and network effects. In particular, low (or even negative) user prices can arise as an equilibrium response to strong network effects, while higher subscription fees can reflect greater horizontal differentiation. Therefore, assessments of market power should be based on non-price dimensions as well, such as feature access, visibility tools, verification, and service quality, rather than solely relying on prices.