) Incentives to increase variety are higher for duopoly supermarkets because of the business stealing effect; 2) As more products … answer whether consumers are better-off in duopoly, when prices and variety are higher, I estimate consumer preferences. I … find that consumer welfare is higher under competition. However, that is a result from the wider choice of products rather …

competition between the TV channels, since they take into account the fact that a lower viewer price at one channel will harm …

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 …