The paper considers tacit collusion in markets which are not fully transparent on both sides. Consumers only detect prices with some probability before deciding which fi?rm to purchase from, and each fi?rm only detects the other fi?rm's price with some probability. Increasing transparency on the...

We examine the scope and value of targeted advertising in the magazine industry. We use data on reader characteristics at individual media, in contrast to previous work that has needed to infer this information from aggregate data. Our results show a strong relationship between subscriber...

On April 1, 2005, Denmark changed the way references prices, a main determinant of reimbursements for pharmaceutical purchases, are calculated. The previous reference prices, which were based on average EU prices, were substituted to minimum domestic prices. Novel to the literature, we estimate...

This paper analyses how competition between media firms influences the way they are financed. In a setting where monopoly media firms choose to be completely financed by consumer payments, competition may lead the media firms to be financed by advertising as well. The closer substitutes the...

Motivated by empirical findings from jewellery sold at public English auctions at Crédit Municipal de Paris, we study the effect of the presence of two types of bidders on equilibrium strategies and on the price tendency. We consider a second-price auction (sealed-bid og English auction) where...

The choice between quantity and price in order to stabilize collusion is modeled here. It is shown that this relocates the prisoners’ dilemma backwards, from the market stage to the stage where the market variable is chosen in order to sustain collusion, and where discount rates appear as the...

The paper analyses the extent of and the reasons behind limits to competition policy harmonisation in EU enlargement. Our focus is on vertical restraints. First, we compare the relevant legal regimes towards vertical agreements in the EU and in Eastern Europe. We then describe competition policy...

Price correlations are used to delineate the geographic market in two recent Danish electricity cases. They indicate that power generators hold temporally transitory and irregularly intermittent dominant positions. Calculation of the Lerner index reveals that they abused this position. The...

In certain product categories, large discount retailers are known to offer shallower assortments than traditional retailers. In this paper, we investigate the competitive incentives for such assortment decisions and the implications for manufacturers’ distribution strategies. Our results show...

I derive a model of profit maximization for a print media firm with upfront advertising pricing. The model is estimated using detailed quarterly data on German women's magazines observed between I/1994 and IV/2004. Main empirical results are that (i) cover price increases lead to substantial...