What makes a market contestable?
What makes a market contestable?

A contestable market is disciplined by the threat of new entry, rather than by the number of firms already operating. Even a monopolist may behave competitively if rivals can enter and leave easily.
Step-by-step lessons on Edexcel A A Level Economics 3.4.7 Contestability. Each one builds up to exam-style questions. Start with the core supply-and-demand models before moving on to the more evaluation-heavy macroeconomic policy topics.