This paper discusses a number of methodological challenges that ex-post evaluation of competition policy faces. We argue that imprecise measurement and simplified analysis not only leads to unreliable results, but also triggers behavioral responses by competition authorities. Because evaluation...

We characterize the degree of price discretion that competing principals award their agents in a framework where agents are informed about demand and seek to pass on their unveriÖable distribution costs to consumers at the principalsí expense. Principals learn demand probabilistically and may...