NASH EQUILIBRIUM WITH MARKUP-PRICING OLIGOPOLISTS. Simon Grant Economics Program RSSS, ANU Canberra 0200, Australia John Quiggin Centre for Economic Policy Research RSSS, ANU Canberra 0200, Australia Grant, S. and Quiggin, J. (1994), ‘Nash equilibrium with markup-pricing oligopolists’, Economics Letters 45, 245—51. If business managers formulate strategies in terms of mark-ups, then it is natur...