I - PPC = PB < PC < PM Show
I, II, III and IV are true Perfect competition results in the highest total quantity Q and the lowest market price P, with zero DWL (the market is efficient) and zero market power (Lerner index = 0 because P = MC) Bertrand duopoly results in the same outcomes as perfect competition. Moreover, the monopolist will choose the lowest quantity to induce the highest price out of these four markets The lowest quantity and highest price result in the highest DWL (very inefficient market) and the highest Lerner index (more market power is associated with a higher L) The degree of competition in the Cournot duopoly is somewhere between perfect competition (very competitive) and the monopoly (no competition). Therefore, the total quantity, price, DWL, and Lerner index of market power in Cournot are between PC and M Recommended textbook solutionsPrinciples of Economics8th EditionN. Gregory Mankiw 1,335 solutions Essentials of Investments9th EditionAlan J. Marcus, Alex Kane, Zvi Bodie 689 solutions Statistics for Business and Economics13th EditionDavid R. Anderson, Dennis J. Sweeney, James J Cochran, Jeffrey D. Camm, Thomas A. Williams 1,692 solutions
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