Converse of object

• become: Through mergers and acquisitions, these publishers are becoming an oligopoly.

Adjective modifier

• international: The analysis in this study looks at trade liberalization in a unionized international oligopoly.

Modifies a noun

• theory: Oligopoly and competition law: Introduction to oligopoly theory and tacit collusion.

• power: These researchers note that when increases in efficiency are smaller than increases in oligopoly power, prices will rise.

• market: This process of ' differentiation ' is one of the key ways in which firms compete in oligopoly markets.

• structure: Oligopoly structure: An industry dominated by a small group of competitors.