Question:

Which of the following mathematical equations correctly represents the transformation route to derive Gross National Product at Factor Cost (\( \text{GNP}_{fc} \)) from Gross Domestic Product at Market Prices (\( \text{GDP}_{mp} \))?

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Keep your directional signs straight: Add foreign factor flows (\( + \text{NFIA} \)) to go from domestic to national, and Subtract product taxes (\( - \text{NIT} \)) to drop market prices down to factory cost.
Updated On: Jun 3, 2026
  • \( \text{GNP}_{fc} = \text{GDP}_{mp} + \text{Net Factor Income from Abroad (NFIA)} - \text{Net Indirect Taxes (NIT)} \)
  • \( \text{GNP}_{fc} = \text{GDP}_{mp} - \text{Net Factor Income from Abroad (NFIA)} + \text{Net Indirect Taxes (NIT)} \)
  • \( \text{GNP}_{fc} = \text{GDP}_{mp} + \text{Net Factor Income from Abroad (NFIA)} - \text{Depreciation} \)
  • \( \text{GNP}_{fc} = \text{GDP}_{mp} - \text{Net Indirect Taxes (NIT)} - \text{Depreciation} \)
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The Correct Option is A

Solution and Explanation

Concept: National Income aggregates are derived by systematically converting terms across three core levels:
  • Domestic to National: Adjusted using Net Factor Income from Abroad (\( \text{National} = \text{Domestic} + \text{NFIA} \)).
  • Market Price to Factor Cost: Adjusted using Net Indirect Taxes (\( \text{Factor Cost} = \text{Market Price} - \text{NIT} \)).
  • Gross to Net: Adjusted using Depreciation (\( \text{Net} = \text{Gross} - \text{Depreciation} \)).


Step 1:
Convert the geographic boundary from Domestic to National. Starting with our base variable \( \text{GDP}_{mp} \), we shift from a domestic production territory to a national concept by adding Net Factor Income from Abroad (NFIA): \[ \text{GNP}_{mp} = \text{GDP}_{mp} + \text{NFIA} \]

Step 2:
Convert the valuation base from Market Prices to Factor Cost. Market prices include indirect product taxes and exclude government production subsidies. To evaluate the output at true factor cost, we subtract Net Indirect Taxes (NIT = Indirect Taxes - Subsidies): \[ \text{GNP}_{fc} = \text{GNP}_{mp} - \text{NIT} \]

Step 3:
Combine both transformation operations. Merging the two individual adjustment steps yields the complete composite equation: \[ \text{GNP}_{fc} = \text{GDP}_{mp} + \text{NFIA} - \text{NIT} \]
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