In Brazil, telecommunications giant NexaCable has a highly reputable brand image and a 55% share of the high-speed fiber-optic market. This means the fiber-optic market in Brazil is likely to have a low level of:
concentration
contestability
state intervention
product differentiation
7 exam-style questions on Edexcel A A Level Economics 3.4.7 Contestability. Each one has a worked solution and a mark scheme showing where the marks go.