• A note on upward pricing pressure : the possibility of false positives 

      Mathiesen, Lars; Nilsen, Øivind Anti; Sørgard, Lars (Discussion paper;11/2012, Working paper, 2012-05)
      Farrell and Shapiro proposed a simple test of the possible upward pricing pressure (UPP) following a merger. They showed that the test may give false negatives, that is, indicate that a merger may not give an UPP, while ...
    • Climate policy and the steel industry : achieving global emission reductions by an incomplete climate agreement 

      Mathiesen, Lars; Mæstad, Ottar (Discussion paper, Working paper, 2002-10)
      The steel industry is one of the largest sources of global CO2 emissions and hence a candidate for climate policies. A carbon tax on emissions in industrialized countries, however, will cause relocation of steel production ...
    • Merger simulations with observed diversion ratios 

      Mathiesen, Lars; Nilsen, Øivind Anti; Sørgard, Lars (Discussion paper, Working paper, 2010-10)
      A common approach to merger simulations used in antitrust cases is to calibrate demand from market shares and a few additional parameters. When the products involved in the merger case are differentiated along several ...
    • On the significance of pre-existing distortions for the costs of environmental regulation 

      Mathiesen, Lars; Håkonsen, Lars (Discussion paper, Working paper, 2001-05)
      Recently, several papers have shown that environmental taxes are more costly in an economy with preexisting distortions than in an undistorted economy. This result applies for equal percent reductions from different ...
    • Price patterns resulting from different producer behavior in spatial equilibrium 

      Mathiesen, Lars (Discussion paper;5/2012, Working paper, 2012-03)
      We are concerned with economic analyses of markets from the perspective of supporting a decision maker selling in the market. The competitive pressure and the price formation are central issues. The goal of this paper ...
    • Regulation of pollution in a Cournot equilibrium 

      Mathiesen, Lars (Discussion paper, Working paper, 2008-06)
      In the traditional Cournot model producers influence each other’s decisions through revenue earned in the product market. Rosen (1965) introduced the notion of a coupled constraints equilibrium which allowed players to ...
    • Water with power : market power and supply shortage in dry years 

      Mathiesen, Lars; Skaar, Jostein; Sørgard, Lars (Discussion paper, Working paper, 2003-12)
      The purpose of this paper is to analyse how market power may affect the allocation of production between seasons (summer and winter) in a hydro power system with reservoirs and where inflow in winter is uncertain. We find ...