This presentation basically tells how the firm makes decisions in a competitive market. To make concepts here more understable, I have prepared graphs and mathematical equations.
10. Profit Maximization: Graphical Illustration COST AND REVENUE QUANTITY MC ATC P = AR = MR AVC P = MR 1 = MR 2 Q 2 Q MAX Q 1 0 MC 1 MC 2 The firm maximizes profit by producing the quantity at which marginal cost equals marginal revenue
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12. MARGINAL COST AS THE FIRM'S SUPPLY CURVE PRICE QUANTITY P 2 P 1 0 Q 1 Q 2 AVC ATC MC
13. THE COMPETITIVE FIRM'S SHORT-RUN SUPPLY CURVE MC ATC AVC COSTS QUANTITY Firm's shuts down if P ‹ AVC Firm's short-run supply curve
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16. THE COMPETITIVE FIRM'S LONG-RUN SUPPLY CURVE MC ATC COSTS QUANTITY 0 Firms exits if P ‹ ATC Firm's long-run supply curve