All monopolies are not equally powerful. Some monopolists are able to exercise greater control on price-output than others, We would not. therefore. think that all monopolists have the same capacity for influencing price and output in an indus. The degree of monopoly power is indicated by the extent of influence that a monopolist can exercise on price and output.  power II mean the amount of discretion which Ihe or the intensity of to which  him in  with nganl to the output and the price of his product and till of his. In short. monopoly power indicates the extent of the departure from the competitive behaviour.