We consider price-adjusting oligopoly models involving Bertrand or adaptive expectations concerning the rivals' prices. Traditionally, one specifies these models with first order exponential adjustment lags. We introduce specific higher order exponential lags in both models which provides a more...

In order to simplify stability analysis of an economic model one can assume that one of the model variables moves infinitely fast towards equilibrium, given the values of the other slower variables. We present conditions such that stability of the simplified model implies, or is implied by,...

We consider price-adjusting oligopoly models involving Bertrand or adaptive expectations concerning the rivals' prices. Traditionally, one specifies these models with first order exponential adjustment lags. We introduce specific higher order exponential lags in both models, which provides a...