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market power (An indefinite concept concerned with the strength of the position of the dominant firm in a market. Market power can be regarded as high if the dominant firm has the ability to act as a price leader, if it can dictate the conditions of sale for its products, if it is able to deter entry, or if it can make persistently super-normal profits. ОЕ. Market Power occurs when a firm has a significant share of the market – say greater than 25% of the market. When a firm has a large share of the market it can act in a way that is said to be an abuse of market power.  economicshelp.org Alexander Demidov) |
