GDP, Real Output & the Limits of Economic Measures — Practice · Grade 12 Social Studies

Chapter: Measuring the Economy & Public Policy

What this practice covers

By the end of GDP, Real Output & the Limits of Economic Measures you should be able to:

8 questions, written answer, each with a worked explanation.

Vocabulary used: GDP, value added, nominal, real, per capita.

Problem 1

Why should an intermediate input not be added again to the final good’s full value?
Answer and explanation

Its contribution is already embodied in the final value. Adding it again double counts production. Count the final product or consistent value added along the chain under the specified accounting framework.

Problem 2

Why is subtracting imports different from proving they reduce welfare?
Answer and explanation

The subtraction removes foreign production already included in domestic expenditure categories. It is an accounting adjustment. Welfare and causal effects involve access, prices, production, income, distribution, and alternatives, which the sign alone cannot establish.

Problem 3

What can the ten-unit price example establish about real growth?
Answer and explanation

Quantity remains ten, so the simple fixed-price output measure does not grow. Nominal value rises 50 percent because price rises from $2 to $3. The example distinguishes mechanisms without claiming to be an official chained-price calculation.

Problem 4

Why is GDP per person not the income of every resident?
Answer and explanation

It is an average production measure divided by population. Production, income distribution, and individual circumstances differ. Use appropriate household or distributional records before making a claim about a particular resident or universal benefit.

Problem 5

Invented period: C=100, I=40, G=30, exports=20, imports=10, population=90; all components use one consistent monetary unit. Calculate GDP and per-person GDP, then explain a limitation.
Answer and explanation

GDP is 180 units and per-person GDP is two units. Imports are removed to avoid including foreign production in domestic output. Neither the subtraction nor the average establishes household income, equal distribution, or overall well-being. The supplied model needs other indicators for those questions and does not identify an actual national economy.

Apply the expenditure identity.

Divide by population.

Distinguish accounting from welfare and distribution.

Response criteria

  • Explain the relevant institution or economic concept accurately; show correct calculations where needed.
  • Connect supplied evidence and stated assumptions to an explained conclusion.
  • Compare feasible options and their effects on different people without stereotypes.
  • Identify a limitation, tradeoff, uncertainty, or condition that qualifies the conclusion.

Problem 6

If nominal GDP rises while all quantities are unchanged, must real output rise?
Answer and explanation

No. A price increase can raise nominal value without more production. Apply a specified price adjustment and examine quantities. The simple example illustrates the distinction; actual official real measures use defined statistical methods.

Response criteria

  • Explain the relevant institution or economic concept accurately; show correct calculations where needed.
  • Connect supplied evidence and stated assumptions to an explained conclusion.
  • Compare feasible options and their effects on different people without stereotypes.
  • Identify a limitation, tradeoff, uncertainty, or condition that qualifies the conclusion.

Problem 7

Invented model: C=90, I=20, G=30, X=15, M=5. Calculate GDP and explain the import adjustment.
Answer and explanation

GDP is 150 units. The import subtraction removes foreign production included in expenditure categories; it is not a direct welfare or causal verdict. Component definitions, period, and accounting assumptions must be consistent.

Response criteria

  • Explain the relevant institution or economic concept accurately; show correct calculations where needed.
  • Connect supplied evidence and stated assumptions to an explained conclusion.
  • Compare feasible options and their effects on different people without stereotypes.
  • Identify a limitation, tradeoff, uncertainty, or condition that qualifies the conclusion.

Problem 8

Five units sell for $4 in Period A and the same five for $6 in B. Calculate nominal growth and fixed-A-price output.
Answer and explanation

Nominal value rises from $20 to $30, fifty percent. At the original price, both periods have $20 output, so quantity does not grow. This simple fixed-price model is not an official chained-GDP estimate.

Response criteria

  • Explain the relevant institution or economic concept accurately; show correct calculations where needed.
  • Connect supplied evidence and stated assumptions to an explained conclusion.
  • Compare feasible options and their effects on different people without stereotypes.
  • Identify a limitation, tradeoff, uncertainty, or condition that qualifies the conclusion.

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