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 PERFECT COMPETITION, LONG-RUN ADJUSTMENT: A perfectly competitive industry undertakes a two-part adjustment to equilibrium in the long run. One is the adjustment of each perfectly competitive firm to the appropriate factory size that maximizes long-run profit. The other is the entry of firms into the industry or exit of firms out of the industry, to eliminate economic profit or economic loss. The end result of this long-run adjustment is a multi-faceted equilibrium condition that price is equal to marginal cost and average cost (both short run and long run).
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 Lesson Contents Unit 1: Price Taker A Perfect Market Characteristics Revenue Profit Maximization Unit 1 Summary Unit 2: Short-Run Output The Revenue Side The Revenue Numbers The Cost Side Comparing Totals Comparing Marginals Unit 2 Summary Unit 3: Doing Graphs Total Curves Profit Curve Marginal Curves Dividing Revenue Short-Run Alternatives Short-Run Supply Unit 3 Summary Unit 4: Long-Run Equilibrium Long-Run Marginal Cost Adjustment Entry And Exit Equilibrium Conditions Long-Run Supply Unit 4 Summary Unit 5: Evaluation The Good The Bad Market Control Unit 5 Summary Course Home
Perfect Competition

• The first unit of this lesson, Price Taker, begins this study with a look at the general structure of a perfectly competitive market.
• In the second unit, Short-Run Output, we take a look at the short-run production decision faced by a perfectly competitive firm based on the cost and revenue numbers.
• The third unit, Doing Graphs, then looks at the short-run production decision faced by a perfectly competitive firm using a graphical analysis of cost and revenue.
• In the fourth unit, Long-Run Equilibrium, we examine the nature of long-run adjustment by a perfectly competition industry when all inputs are variable.
• The fifth and final unit, Evaluation, then closes this lesson by considering the pros and cons of a perfectly competitive industry.

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SCARCITY

A pervasive condition of human existence that results because society has unlimited wants and needs, but limited resources used for their satisfaction. This fundamental condition is the common thread that binds all of the topics studied in economics.

 PINK FADFLY[What's This?] Today, you are likely to spend a great deal of time at an auction trying to buy either a cross-cut paper shredder or a birthday greeting card for your father. Be on the lookout for telephone calls from long-lost relatives.Your Complete Scope
 Before 1933, the U.S. dime was legal as payment only in transactions of \$10 or less.
 "We tend to forget that happiness doesn't come as a result of getting something we don't have, but rather of recognizing and appreciating what we do have."-- Fredrick Koeing
 JFEJournal of Financial Economics
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