What form does rivalry occur in an oligopoly?

In an oligopoly, rivalry typically occurs through non-price competition, such as advertising, product differentiation, and innovation, rather than through price cuts. Firms may engage in strategic behaviors like collusion or forming cartels to maximize profits while avoiding price wars. Price competition can still happen, but it's often limited due to the interdependence of firms; each firm's pricing decisions significantly affect the others. This results in a careful balancing act to maintain market share while ensuring profitability.