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PERFECT COMPETITION, SHORT-RUN PRODUCTION ANALYSIS: A perfectly competitive firm produces the profit-maximizing quantity of output that equates marginal revenue and marginal cost. This production level can be identified using total revenue and cost, marginal revenue and cost, or profit. Because a perfectly competitive firm faces a perfectly elastic demand curve, it efficiently allocates resources by equating price and marginal cost. In addition, the marginal cost curve above the average variable cost curve is the perfectly competitive firm's short-run supply curve.

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FACTOR SUPPLY DETERMINANTS

Ceteris paribus influences, other than factor price, that shift the factor supply fall into three general categories: (1) market supply determinants, (2) market demand determinants, and (3) mobility. Comparable to any determinant, those falling into these three categories cause the factor supply curve to shift to a new location. An increase in factor supply is a rightward shift of the factor supply curve and a decrease in factor supply is a leftward shift.

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