Resale of used products may shrink the new-product market and create the cannibalization problem. This problem is exacerbated in the digital goods market because copies of digital goods can be perfect substitutes of the original. Many digital goods/service producers take advantage of technology...

We study pricing strategies of competing firms that sell heterogeneous products to consumers in a social network. Goods are substitutes and there are network externalities between neighboring consumers. We show that there exists a unique subgame-perfect equilibrium where, in the first stage,...

This study analyzes a monopolistic seller’s optimal differential pricing problem with strategic consumers connected in social networks. The consumers who purchase in the later period can get positive externality from their friends who purchased in the early period but have to bear a utility...