The paper describes a spatial economic equilibrium in which each market shows an equilibrium and the location of all producers is determined in an optimal way. Being a very general model, in order to solve it a number of hypotheses had to be introduced. We used the hypothesis of Tinbergen and...

The quadratic assignment problem (QAP) or maximum acyclical graph problem is well documented (see e.g. Pardalos and Wolkowicz, 1994). One of the authors has published some material, in which it was tried, by structuring the problem additionally, to bring it as closely as possible in the...