AP MACROECONOMICS
UNIT 1 STUDY GUIDE
Basic Economic Concepts
Everything you need to know for your Unit 1 test —
key concepts, models, vocabulary, formulas, and exam strategy, aligned to the official College Board framework.
What's Inside
• 1. Unit Overview & The Big Picture
• 2. Key Concepts (Official College Board Framework)
• 3. Deep Dive: The Production Possibilities Curve (PPC)
• 4. Deep Dive: Comparative Advantage & Gains from Trade
• 5. Supply & Demand: Determinants & Shifters
• 6. Full Vocabulary List — Core Concepts, Markets & Trade Terms
• 7. Key Formulas & Quick-Reference Calculations
• 8. Common Exam Traps & How to Avoid Them
• 9. Practice Questions
1. Unit Overview & The Big Picture
Unit 1, “Basic Economic Concepts,” is the foundation for the entire AP Macroeconomics course. It's officially worth
only about 5–10% of the multiple-choice exam on its own, but don't let that low weighting fool you — the models you
build here (scarcity, the PPC, comparative advantage, and supply & demand) are the tools you will reuse in every
single unit that follows, including the Aggregate Demand/Aggregate Supply (AD/AS) model in Unit 3 and the loanable
funds market in Unit 5.
Macroeconomics studies the economy as a whole (inflation, unemployment, growth, national output) rather
than individual consumers or firms — that's microeconomics. But Unit 1's single-market supply & demand
model is the building block you'll scale up into whole-economy models all year, so mastering the mechanics
now is non-negotiable.
Unit 1 questions are almost entirely multiple-choice and graphing-based. It rarely anchors a full Free Response
Question (FRQ) by itself, but PPC graphs, comparative advantage tables, and supply-and-demand shift diagrams
appear as required sub-parts of FRQs across the entire exam — so weak Unit 1 graphing skills will cost you points in
every later unit too.
The 3 Things Your Teacher Wants You to Walk Away Knowing:
• Scarcity forces every economic actor to make trade-offs — opportunity cost (the value of the next-best
alternative given up) is the true cost of any choice, not just the dollar price.
, • The PPC and comparative advantage model prove that specialization and trade make both parties better off —
even a country with an absolute advantage in everything should still specialize based on comparative (lowest
opportunity cost) advantage.
• In a competitive market, price and quantity are determined by the interaction of supply and demand — you
must be able to distinguish a movement along a curve (change in quantity demanded/supplied) from a shift of
the entire curve (change in demand/supply).
2. Key Concepts (Official College Board Framework)
The College Board organizes Unit 1 into six required topics (1.1–1.6). Know each concept well enough to apply it to a
new scenario — not just recite the vocabulary.
Topic 1.1 — Scarcity
• Economics is the study of how individuals, firms, and societies allocate scarce resources to satisfy unlimited
wants and needs.
• The four factors of production: land (natural resources), labor (human effort), capital (tools, machinery,
buildings — physical capital, not money), and entrepreneurship (the risk-taking that combines the other three).
• Because resources are finite, every choice — by an individual, a firm, or a government — involves an
opportunity cost.
Topic 1.2 — Opportunity Cost and the Production Possibilities Curve (PPC)
• Opportunity cost = the value of the next-best alternative that is given up when a choice is made.
• The PPC is a graph showing the maximum possible combinations of two goods an economy can produce given
fixed resources and technology.
• Points ON the curve are productively efficient (full employment of resources); points INSIDE the curve are
inefficient/underutilized; points OUTSIDE the curve are currently unattainable.
• A bowed-out (concave) PPC reflects the law of increasing opportunity cost, which occurs because resources are
specialized and not perfectly adaptable between producing the two goods.
Topic 1.3 — Comparative Advantage and Gains from Trade
• Absolute advantage: the ability to produce more of a good than another producer using the same quantity of
resources.
• Comparative advantage: the ability to produce a good at a LOWER opportunity cost than another producer —
this, not absolute advantage, determines who should specialize in what.
• When each party specializes according to comparative advantage and trades at a mutually beneficial price, total
production and consumption for both parties can exceed what either could achieve alone.
Topic 1.4 — Demand
• Law of demand: price and quantity demanded are inversely related, ceteris paribus (all else equal) — as price
rises, quantity demanded falls, and vice versa.
• A change in price causes a movement ALONG a fixed demand curve (change in quantity demanded).
• A change in a non-price determinant (income, tastes, price of related goods, expectations, number of buyers)
shifts the ENTIRE demand curve (change in demand).
Topic 1.5 — Supply
• Law of supply: price and quantity supplied are directly related, ceteris paribus — as price rises, quantity supplied
rises, and vice versa.
• A change in price causes a movement ALONG a fixed supply curve (change in quantity supplied).
UNIT 1 STUDY GUIDE
Basic Economic Concepts
Everything you need to know for your Unit 1 test —
key concepts, models, vocabulary, formulas, and exam strategy, aligned to the official College Board framework.
What's Inside
• 1. Unit Overview & The Big Picture
• 2. Key Concepts (Official College Board Framework)
• 3. Deep Dive: The Production Possibilities Curve (PPC)
• 4. Deep Dive: Comparative Advantage & Gains from Trade
• 5. Supply & Demand: Determinants & Shifters
• 6. Full Vocabulary List — Core Concepts, Markets & Trade Terms
• 7. Key Formulas & Quick-Reference Calculations
• 8. Common Exam Traps & How to Avoid Them
• 9. Practice Questions
1. Unit Overview & The Big Picture
Unit 1, “Basic Economic Concepts,” is the foundation for the entire AP Macroeconomics course. It's officially worth
only about 5–10% of the multiple-choice exam on its own, but don't let that low weighting fool you — the models you
build here (scarcity, the PPC, comparative advantage, and supply & demand) are the tools you will reuse in every
single unit that follows, including the Aggregate Demand/Aggregate Supply (AD/AS) model in Unit 3 and the loanable
funds market in Unit 5.
Macroeconomics studies the economy as a whole (inflation, unemployment, growth, national output) rather
than individual consumers or firms — that's microeconomics. But Unit 1's single-market supply & demand
model is the building block you'll scale up into whole-economy models all year, so mastering the mechanics
now is non-negotiable.
Unit 1 questions are almost entirely multiple-choice and graphing-based. It rarely anchors a full Free Response
Question (FRQ) by itself, but PPC graphs, comparative advantage tables, and supply-and-demand shift diagrams
appear as required sub-parts of FRQs across the entire exam — so weak Unit 1 graphing skills will cost you points in
every later unit too.
The 3 Things Your Teacher Wants You to Walk Away Knowing:
• Scarcity forces every economic actor to make trade-offs — opportunity cost (the value of the next-best
alternative given up) is the true cost of any choice, not just the dollar price.
, • The PPC and comparative advantage model prove that specialization and trade make both parties better off —
even a country with an absolute advantage in everything should still specialize based on comparative (lowest
opportunity cost) advantage.
• In a competitive market, price and quantity are determined by the interaction of supply and demand — you
must be able to distinguish a movement along a curve (change in quantity demanded/supplied) from a shift of
the entire curve (change in demand/supply).
2. Key Concepts (Official College Board Framework)
The College Board organizes Unit 1 into six required topics (1.1–1.6). Know each concept well enough to apply it to a
new scenario — not just recite the vocabulary.
Topic 1.1 — Scarcity
• Economics is the study of how individuals, firms, and societies allocate scarce resources to satisfy unlimited
wants and needs.
• The four factors of production: land (natural resources), labor (human effort), capital (tools, machinery,
buildings — physical capital, not money), and entrepreneurship (the risk-taking that combines the other three).
• Because resources are finite, every choice — by an individual, a firm, or a government — involves an
opportunity cost.
Topic 1.2 — Opportunity Cost and the Production Possibilities Curve (PPC)
• Opportunity cost = the value of the next-best alternative that is given up when a choice is made.
• The PPC is a graph showing the maximum possible combinations of two goods an economy can produce given
fixed resources and technology.
• Points ON the curve are productively efficient (full employment of resources); points INSIDE the curve are
inefficient/underutilized; points OUTSIDE the curve are currently unattainable.
• A bowed-out (concave) PPC reflects the law of increasing opportunity cost, which occurs because resources are
specialized and not perfectly adaptable between producing the two goods.
Topic 1.3 — Comparative Advantage and Gains from Trade
• Absolute advantage: the ability to produce more of a good than another producer using the same quantity of
resources.
• Comparative advantage: the ability to produce a good at a LOWER opportunity cost than another producer —
this, not absolute advantage, determines who should specialize in what.
• When each party specializes according to comparative advantage and trades at a mutually beneficial price, total
production and consumption for both parties can exceed what either could achieve alone.
Topic 1.4 — Demand
• Law of demand: price and quantity demanded are inversely related, ceteris paribus (all else equal) — as price
rises, quantity demanded falls, and vice versa.
• A change in price causes a movement ALONG a fixed demand curve (change in quantity demanded).
• A change in a non-price determinant (income, tastes, price of related goods, expectations, number of buyers)
shifts the ENTIRE demand curve (change in demand).
Topic 1.5 — Supply
• Law of supply: price and quantity supplied are directly related, ceteris paribus — as price rises, quantity supplied
rises, and vice versa.
• A change in price causes a movement ALONG a fixed supply curve (change in quantity supplied).
