Competition refers to the activities of companies trying to be more successful than others. For perfect competition to exist in a market, there must be many buyers and sellers, identical products, easy entry and exit from the market, and transparent pricing. A monopoly is a market structure with only one producer that has complete control through barriers to entry. Monopolies can dictate prices but provide less quality and output. Anti-trust laws were introduced to prohibit monopolies, while an oligopoly is a middle ground with a few dominant firms controlling the market.