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PERFECT COMPETITION, LONG-RUN EQUILIBRIUM CONDITIONS: The long-run equilibrium of a perfectly competitive industry generates six specific equilibrium conditions, including: (1) economic efficiency (P = MC), (2) profit maximization (MR = MC), (3) perfect competition (MR = AR = P), (4) breakeven output (P = AR = ATC), (5) minimum production cost (MC = ATC), and (6) minimum efficient scale (MC = ATC = LRAC = LRMC).

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Lesson 6: Supply | Unit 4: Determinants Page: 14 of 19

Topic: Shifters: Decrease <=PAGE BACK | PAGE NEXT=>

Supply determinants shift the supply curve.
  • The supply curve is drawn assuming that only price and quantity change. The determinants are assumed to be constant.
  • A change in one of the determinants can cause:
  • A decrease in supply, a leftward shift, which means that for any price, for every price, sellers are willing and able to sell less of the good.

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A curve that graphically represents the relation between average factor cost incurred by a firm for employing an input and the quantity of input used. Because average factor cost is essentially the price of the input, the average factor cost curve is also the supply curve for the input. The average factor cost curve for a firm with no market control is horizontal. The average revenue curve for a firm with market control is positively sloped.

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