The model of perfect competition and the model of monopolistic competition differ in that
perfect competition assumes the product is homogeneous and monopolistic competition
assumes the product is differentiated.
perfect competition assumes firms make zero profits in the long run and monopolistic
competition assumes firms make positive profits.
perfect competition assumes easy entry of new firms while there are more significant barriers
to entry in monopolistic competition.
perfect competition assumes many buyers and sellers while monopolistic competition
assumes many buyers but few sellers.
In the short run, the monopolistic competitor is just like the perfect competitor in that
each equates marginal revenue and marginal cost in order to maximize profits, with the result
that price exceeds marginal revenue.
equilibrium is determined by setting price equal to marginal cost.
new firms enter in the short run when firms are making profits.
either type of firm can earn economic profits, experience economic losses, or break even in the
short run.
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In the long run, monopolistically competitive firms will not earn economic profits because
new firms will enter the industry.
production will not be at minimum average cost.
average total cost will shift up to meet the demand curve.
input prices will be bid up.
A