1.1ScarcityAP MacroeconomicsThe Problem of ScarcityFactors of ProductionThe Three Economic QuestionsEconomic SystemsMacro Connection: National ScarcityAP Exam Tips•••Common Mistakes•••Unit 1 topicsUnit 1 overview1.1Scarcity1.2Opportunity Cost and the Production Possibilities Curve1.3Comparative Advantage and Gains from Trade1.4Demand1.5Supply1.6Market Equilibrium, Disequilibrium, and Changes in Equilibrium← PreviousUnit 1: Basic Economic ConceptsNext →1.2 Opportunity Cost and the Production Possibilities CurvePractice AP Macroeconomics questions →