This is a survey of the economic principles that underlie antitrust law and how those principles relate to competition policy. We address four core subject areas: market power, collusion, mergers between competitors, and monopolization. In each area, we select the most relevant portions of...

We propose conduct parameter based market power measures within a model of price discrimination, extending work by Hazledine (2006) and Kutlu (2012) to certain forms of second degree price discrimination. We use our model to estimate the market power of U.S. airlines in a price discrimination...

This paper investigates price patterns of off-patent pharmaceuticals in Sweden. I show that price dynamics are dependent on the number of competitors in the market. The price patterns follow predictions from a model of dynamic price competition in which the demand for pharmaceuticals...

In this paper, we revisit the empirical observation that prices rise like rockets when input costs increase but fall like feathers when input costs decrease. The analysis draws on a novel dataset that include daily retail prices of gasoline and diesel from virtually all fuel stations in Germany...

This article studies dynamic pricing strategies in the Italian gasoline market before and after the market leader unilaterally announced its commitment to adopt a sticky-pricing policy. Using daily Italian firm level prices and weekly average EU prices, we show that the effect of the new policy...

In this comprehensive review of ex-post merger studies price effects of horizontal transactions are evaluated. By combining and further analyzing the results of 52 retrospective studies on 82 mergers or merger-like transactions it can be shown that the industry alone is no strong indication for...

Retailers act as both customers and competitors for brand manufacturers when selling private label in direct competition with brands. This paper considers whether retailers exploit this double-agent position to practice switch marketing, manipulating elements of the retail marketing mix to...

We model a two-sided market with heterogeneous customers and two heterogeneous network effects. In our model, customers on each market side care differently about both the number and the type of customers on the other side. Examples of two-sided markets are online platforms or daily newspapers....

We investigate the welfare impacts of price discrimination using a two-dimensional product differentiation model with best-response asymmetry. Among our findings: (i) Price discrimination has a reduced demand elasticity effect in two-dimensional models but not in one-dimensional models. (ii)...