13: Oligopoly Last updated Jan 4, 2021 Save as PDF 12.1: Monopolistic Competition 13.1: Prerequisites of Oligopoly Page ID3518 BoundlessBoundless ( \newcommand{\kernel}{\mathrm{null}\,}\) Topic hierarchy13.1: Prerequisites of OligopolyAn oligopoly – a market dominated by a few sellers – is often able to maintain market power through increasing returns to scale.13.2: Oligopoly in PracticeFirms in an oligopoly can increase their profits through collusion, but collusive arrangements are inherently unstable.