
 Paper: Equilibria for circular spatial Cournot markets :: (Site not responding. Last check: 20071107) 
  Substituting these equations into (9), we have that the second order condition is satisfied if and only if  2m k  1 m  1 m m1 + 0, k 4 2 k k1 and it is satisfied if and only if k m. 
  Hamilton, J. Thisse, and A. Weskamp, 1989, "Spatial discrimination: Bertrand vs. Cournot in a model of lo cation choice" Regional Science and Urban Economics 19, 87102. 
  Matsushima, N., 2001a, "Cournot competition and spatial agglomeration revisited" Economics Letters 73, 175177. 
 www.medicalpapers.com /firms+firm+equilibrium+cation+model/4 (545 words) 
