offers especially when many consumers prefer comparable offers. This occurs after initial periods with strong competition and … leads to lower welfare for all consumers. In treatments where firms cannot monitor the competition, firms end up having to …

. In a homogeneous oligopoly, under standard regularity conditions, we prove that Cournot-Nash emerges both under (i) price … competition and Cournot conjectures; and (ii) supply function competition with ex post market clearing. We demonstrate both …

increase with the intensity of competition. We develop a new measure of competition for which we use the proximity (in … departure time) of a given flight to its competitors to infer the intensity of competition and estimate the impact of … competition on advance purchase discounts (APDs) and the dynamic pricing of airlines by exploiting plausibly exogenous changes in …