Marginal analysis of decisions
Rational actors optimize by acting up to the point where marginal benefit equals marginal cost. Most micro problems reduce to this comparison at the margin.
AP microeconomics, 2014-2015
3 ideas
Supply, demand, and equilibrium
Price settles where quantity supplied meets quantity demanded, and shifts in either curve move the equilibrium. Comparative statics predicts the direction of change.
Exam-focused problem drills
The guide organizes microeconomic theory into the recurring question patterns tested on the AP exam. Practice sets convert concepts into scoring technique.