A country' s competition agency is transversal in the sense of being active in the whole economy. We study the interaction between the competition agency and sectoral regulators and establish a scope for sectoral regulators to crowd out each other 's efforts: More effort on monitoring...

We present a model of competition between two advertising-financed media firms when consumers dislike advertising. We apply the model to analyze competition between Internet portals and find that equilibrium prices of advertising are higher the less differentiated the portals are perceived to...