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CLEP Principles of Macroeconomics study materials
CLEP Principles of Macroeconomics study resources

CLEP Principles of Macroeconomics: Measurement of Economic Performance

CLEP Principles of Macroeconomics · Work through your exam, one topic at a time.

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Measurement of Economic Performance

This domain tests how economists measure output, prices, and employment: the expenditure and income approaches to GDP, real versus nominal values, the GDP deflator, the unemployment rate and labor force participation, and the consumer price index. CLEP items often require a short calculation or a judgment about whether a transaction belongs in GDP.

GDP: what counts

  • GDP is the market value of final goods and services produced within a country's borders in a given period.
  • Expenditure approach: GDP = C + I + G + (X − M), where I is gross private domestic investment.
  • The income approach sums wages, rents, interest, profits, and adjustments.
  • Exclude intermediate goods, secondhand sales, transfer payments, and purely financial transactions. Nonmarket and underground activity are missed.

Real versus nominal

  • Nominal GDP uses current prices; real GDP uses base-year prices.
  • GDP deflator = (nominal GDP / real GDP) × 100.
  • Real GDP per capita = real GDP / population.

Labor and price measures

  • Unemployment rate = unemployed / labor force × 100; labor force = employed + unemployed.
  • Discouraged workers are not in the labor force, so the official rate can understate weakness.
  • CPI uses a fixed basket; inflation = (CPI_t − CPI_{t−1}) / CPI_{t−1} × 100.

Worked example

Suppose nominal GDP is $22,000 billion and real GDP is $20,000 billion. The GDP deflator is (22,000 / 20,000) × 100 = 110. If the deflator was 105 one year earlier, inflation over the year is (110 − 105) / 105 × 100 ≈ 4.76%. The deflator covers all domestically produced output, whereas the CPI covers only a fixed consumer basket, so the two inflation measures can differ.

Traps that cost marks

  • Transfer payments such as Social Security are not purchases of current output and are excluded from GDP.
  • Counting intermediate goods double-counts output; only final goods count.
  • Nominal GDP can rise because of inflation; real GDP isolates quantity changes.
  • Part-time workers count as employed, and discouraged workers are outside the labor force.
  • CPI inflation uses a fixed basket; the GDP deflator uses current output and a changing composition.