Free Practice Test: CLEP Principles of Macroeconomics

Every economy faces scarcity: finite resources versus unlimited wants. That single fact drives every choice an economy makes, and it’s captured in the idea of opportunity cost – what you give up to get something else. The production possibilities curve (PPC) is the visual: every point on the curve is an efficient combination of two goods, and moving along the curve forces a tradeoff.

You’ll also need a working understanding of supply and demand, even though macro mostly zooms out beyond individual markets. Know what shifts a supply curve (input costs, technology, taxes, expectations) versus what shifts a demand curve (income, preferences, prices of related goods, expectations, number of buyers). The classic test pitfall is confusing a movement along a curve with a shift of the whole curve, so make sure you can explain the difference in plain language.

How do we know how the economy is doing? Three big metrics: GDP, unemployment, and inflation. Know GDP cold. The expenditure approach says GDP = C + I + G + (X − M), where C is consumption, I is investment, G is government spending, and (X − M) is net exports. Know the difference between nominal GDP (in current prices) and real GDP (adjusted for inflation), and why economists use real GDP for year-over-year comparisons.

For unemployment, distinguish among frictional (between jobs), structural (skills don’t match available jobs, often because of technology or shifts in the economy), and cyclical (caused by recessions). The natural rate of unemployment is frictional plus structural – even a healthy economy has some unemployment.

For inflation, understand the consumer price index (CPI) and how to compute the inflation rate as a percentage change. The business cycle (expansion, peak, recession, trough) is the framework that ties these metrics together.

This section is where aggregate demand (AD) and aggregate supply (AS) take centre stage. Aggregate demand shows the total quantity of goods and services demanded across the entire economy at different price levels. It slopes downward because of the wealth effect (lower prices boost real wealth and spending), the interest rate effect, and the exchange rate effect.

Aggregate supply comes in two flavours. Short-run AS slopes upward because input prices like wages are sticky in the short term, so firms can profit from higher output prices. Long-run AS is vertical at the economy’s potential output – in the long run, all prices adjust and the economy returns to its natural rate of unemployment.

Equilibrium is where AD meets AS. Shifts in either curve change both the price level (inflation) and real GDP. Knowing what shifts each curve, and in which direction, is the bread and butter of this section.

Money is the lifeblood of any modern economy, and this section is heavy. Know the three functions of money (medium of exchange, store of value, unit of account) and the different measures of money supply (M1, M2). The money market shows how money supply and money demand interact to set the equilibrium interest rate.

Banks create money through fractional reserve banking. The money multiplier (1 / reserve ratio) tells you how much new money the banking system can create from a single deposit. Make sure you can run that calculation cold.

The Federal Reserve, the central bank of the United States, has three main monetary policy tools: open market operations (buying or selling Treasury securities), the reserve requirement, and the discount rate. Know which actions expand the money supply (buying securities, lowering reserve requirements, lowering the discount rate) versus contract it (the opposites). Expect at least a few questions on the loanable funds market and how savings, investment, and interest rates relate to each other.

This is the largest single topic on the exam, and it ties everything else together. The Phillips curve captures the historical short-run inverse relationship between inflation and unemployment: when one is low, the other tends to be high. In the long run, the Phillips curve is vertical at the natural rate of unemployment, meaning policymakers can’t permanently lower unemployment by accepting more inflation.

Stabilization policies are how government tries to smooth out the business cycle. Fiscal policy (government spending and taxation) is run by Congress and the President. Monetary policy (interest rates and money supply) is run by the Federal Reserve. Expansionary policies (more spending, lower taxes, lower interest rates) fight recessions but risk inflation. Contractionary policies do the opposite.

Two side effects show up on the test repeatedly: the multiplier effect (a change in spending leads to a larger change in GDP because the new spending ripples through the economy) and the crowding-out effect (government borrowing can raise interest rates and reduce private investment).

Long-run economic growth is what makes a country richer over time. Know the determinants of growth: increases in physical capital (factories, equipment, infrastructure), human capital (education, training), natural resources, and technological progress.

Productivity, defined as output per worker per hour, is the engine of long-run growth. Investment in capital and innovation are what drive productivity higher. Public policies that encourage saving and investment, like tax incentives for capital investment or research and development, can boost long-run growth even if they don’t do much for the next quarter.

In a closed economy, savings equals investment, so policies that increase national savings tend to increase investment and growth.

The final section opens the economy up to the rest of the world. Comparative advantage explains why countries trade: even if one country is better at producing everything (absolute advantage), both countries can still gain by specializing in what they’re relatively best at and trading.

Exchange rates determine how currencies trade against each other. If the dollar appreciates (gets stronger), U.S. exports become more expensive abroad and imports become cheaper at home, typically widening the trade deficit. The opposite holds for depreciation.

The balance of payments is the accounting record of all international transactions. The current account tracks trade in goods, services, income, and transfers; the capital and financial account tracks investment flows; together they must balance. Tariffs, quotas, and other trade restrictions distort prices and reduce overall economic welfare, even when they protect specific domestic industries from foreign competition.