When firms can supply several separate markets, collusion can take two forms. Either firms establish production quotas on all the markets, or they share markets. This paper compares production quotas and market sharing agreements in a Cournot duopoly where firms incur a fixed cost for serving...

The effects of (private, small-scale) copying on the pricing behavior of producers of information goods are studied within a unified model of vertical di¤erentiation. Although information goods are assumed to be perfectly horizontally differentiated, demands are interdependent because the...

Many products and services are not sold on open platforms but on competing for-profit platforms, which charge buyers and sellers for access. What is the effect of for-profit intermediation on seller investment incentives? Investments in cost reduction, quality, or marketing measures are here the...