Computing Economic Equilibria by a Homotopy Method
  In this paper the possibility of computing equilibrium in pure exchange and production economies by a homotopy method is investigated. The performance of the algorithm is tested on examples with known equilibria taken from the literature on general equilibrium models and numerical results are presented. In computing equilibria, economy will be specified by excess demand function. 
Zoltan Pap
q-fin.CP math.OC