نکاتی درباره ثبات یک نوع تعادل تشریح نش: در مورد چندمحصولی با انتظارات تطبیقی

Recently, Zhang and Zhang [Zhang, A., Zhang, Y. (1996). Stability of a Cournot–Nash equilibrium: the multi-product case. Journal of Mathematical Economics, 26, 441–462.] have presented sufficient and necessary conditions for the asymptotical stability of dynamic multiproduct oligopolies with Cournot expectations. First, we show via a counterexample that the necessary conditions given in that paper do not necessarily hold, and then their sufficient conditions are extended to adaptive expectations. Simple sufficient conditions are finally given by using special matrix norms.