In short, now standing in front of monopolistic competition and demand curve DD MC = MR to put profit maximization should now be producing Q0 P0 prices. We can see this point P0 price higher average costs, ac0, Enterprise. Enterprise economic profit is the area of the rectangle C0P0EF = Q 0 (P0-C0). Profits attract new business entrants. Many more businesses operating in a market leading to the redistribution of the enterprise market. Part of every business market will be narrowed shifts the demand curve for each enterprise to left. When the demand curve shifts to DD ', also moved into road MR MR'. Assuming that the MC road now remain the same as now does not change the production technology. Enterprise MC = MR puts' to produce and sell at prices Q1 P1. At this time, P1 = AC1, corporate profit maximization but just barely break even, now no longer obtain super profits. This will not attract new firms enter the industry again. We achieve equilibrium in G, where new demand curve DD 'contact with AC lines. Businesses only at break even and not have any more to add the entry.
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