How might a firm in an oligopolistic market attempt to increase market share?

Explanation of oligopoly; concentration ratio, producer sovereignty

Explanation that oligopolies are often non-price competitive and resulting price rigidity

Use of kinked demand curve to illustrate price rigidity

Explanation of how/why oligopoly firms are interdependent and therefore have an incentive to avoid head-on competition by

a) Collusion

b) Merging

Since oligopoly firms wish to avoid harmful price competition, great effort often goes into R&D, product enhancement, marketing drives, product differentiation