Compared to a market with perfect competition a monopoly often has .?

Compared to a market with perfect competition, a monopoly often has greater market power, allowing it to set prices above marginal cost, leading to higher profits. This results in reduced consumer surplus and less choice for consumers, as the monopolist is the sole supplier of the good or service. Additionally, monopolies may produce less output than would be socially optimal, leading to inefficiencies in the market.