Discussion paper

DP20348 Selling Certification, Content Moderation, and Attention

We introduce a model of content moderation for sale, where a platform can channel attention in two ways: direct steering that makes content visible to consumers and certification that controls what consumers know about the content. The platform optimally price discriminates using both instruments. Content from higher willingness-to-pay providers enjoys higher quality certification and more views. The platform cross-subsidizes content: the same certificate is assigned to content from low willingness-to-pay providers that appeals to consumers and content from higher willingness-to-pay providers that does not. Cross-subsidization can benefit consumers by making content more diverse; regulation enforcing accurate certification may be harmful.

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Citation

Bar-Isaac, H, R Deb and M Mitchell (2025), ‘DP20348 Selling Certification, Content Moderation, and Attention‘, CEPR Discussion Paper No. 20348. CEPR Press, Paris & London. https://cepr.org/publications/dp20348