The authors model the introduction of a minimum quality standard in a vertically differentiated duopoly. They extend the literature by determining the standard endogenously, showing that the maximization of social welfare entails an increase in the surplus accruing to consumers served by the low...

We analyze the design of optimal regulation of a domestic monopolist that also competes in an unregulated foreign market. We show how foreign activities by the regulated firm affect domestic regulation, consumers’ surplus and firm’s profits. Although expansion in unregulated foreign markets...