One of the hallmarks of competitive interaction is each firm’s desire to differentiate from rivals. Although differentiation may be achieved through product related choices, advertising levels may constitute another key mechanism. In this paper, we examine under what conditions firms will...

We study a duopoly model where consumers are heterogeneous with respect to their willingness to pay for two product characteristics and marginal costs are increasing with the quality level chosen on each attribute. We show that while firms seek to manage competition through product positioning,...