• Cartels uncovered 

      Hyytinen, Ari; Steen, Frode; Toivanen, Otto (Working paper, Working paper, 2011-03)
      How many cartels are there? The answer is important in assessing the need for competition policy. We present a Hidden Markov Model that answers the question, taking into account that often we do not know whether a cartel ...
    • Cartels uncovered 

      Steen, Frode; Toivanen, Otto; Hyytinen, Ari (Discussion paper, Working paper, 2010-03)
      How many cartels are there? The answer is important in assessing the efficiency of competition policy. We present a Hidden Markov Model that answers the question, taking into account that often we do not know whether a ...