Firms like Papa John’s, Domino’s and Pizza Hut sell pizza and other products that
are differentiated in nature. While numerous pizza chains exist in most locations, the
differentiated nature of these firms’ products permits them to charge prices above the
marginal cost. Given these above observations, is the pizza industry most likely a
monopoly, perfectly competitive, monopolistically competitive or an oligopoly
industry? How will your answer change if “numerous” is interpreted to mean 10?