It's helpful to think about market share per "competitor", not number of competitors: "However, from a regulatory view, monopoly power exists when a single fir

It's helpful to think about market share per "competitor", not number of competitors: "However, from a regulatory view, monopoly power exists when a single firm controls 25% or more of a particular market. For example, De Beers is known to have a monopoly in the diamond industry." https://www.intelligenteconomist.com/monopoly-market-structure/ https://www.intelligenteconomist.com/monopoly-market-structu...