• Derived demand and price relationships : an analysis of the Norwegian cod sector 

      Asche, Frank; Flaaten, Ola; Isaksen, John R.; Vassdal, Terje (Working Paper, Working paper; Working paper, 2001-08)
      In this paper we note that when there is only one variable factor in the intermediaries' production technology, prices will move proportional to each other over time. This is also the only general condition under which the ...