If firms in a monopolistically competitive industry are earning economic profits, then in the long run
◦ these firms can continue earning economic profits because entry into the industry is blocked.
◦ new firms producing close substitutes will enter the industry and this entry will continue until economic profits are eliminated.
◦ new firms producing the exact same product will enter the industry and this entry will continue until economic profits are eliminated.
◦ the government will most likely regulate firms in this industry to reduce these economic profits.