Production, Cost, and Perfect Competition — AP Microeconomics
1. Unit at a Glance
This unit follows a logical bottom-up learning arc: we start with how firms model production of goods from inputs, then break down how costs behave in the short run and long run. Next, we introduce the perfectly competitive market structure, cover how firms choose output to maximize profit, then analyze short-run and long-run supply and final efficiency outcomes. All concepts you learn here will directly apply to the imperfect competition market structures you study in the next unit.
Common Pitfalls
Why: Economic profit includes implicit opportunity costs that do not appear on accounting statements, which is critical for analyzing entry and exit.
Why: Firms cover fixed costs in the short run even if they lose money, so the shutdown threshold is lower than the exit threshold.
Why: Marginal cost pulls average cost up or down, but they only intersect at the minimum of average total cost.