National Income Measures Explained Simply
- GDP
(Gross Domestic Product)
- What? Total value of all goods
and services produced within a country in a year.
- Example: If a Japanese car is made in
India, it counts toward India’s GDP.
- Uses:
- Measures
economic growth (e.g., 7% GDP growth means the economy expanded by 7%).
- Reflects
domestic economic strength (but doesn’t account for income from abroad).
- NDP
(Net Domestic Product)
- What? GDP minus depreciation (wear
and tear of machinery, buildings, etc.).
- Formula: NDP = GDP – Depreciation.
- Why? Shows sustainable
production after accounting for asset replacement costs.
- Example: If India’s GDP is ₹100 lakh crore and depreciation is ₹10 lakh crore, NDP = ₹90
lakh crore.
- Not
used for global comparisons because
countries set different depreciation rates (e.g., India’s heavy vehicles
depreciate at 40%, while a house depreciates at 1%).
- GNP
(Gross National Product)
- What? GDP + Net Income
from Abroad (earnings of citizens/companies overseas minus
payments to foreigners).
- Formula: GNP = GDP + (Exports – Imports)
+ (Interest from abroad – Interest paid abroad) + (Remittances in –
Remittances out).
- Example:
- India’s
IT workers in the US send money home →
boosts GNP.
- India
imports more than exports → reduces GNP.
- India’s
Case: GNP <
GDP because of trade deficits and foreign loan interest payments.
- NNP
(Net National Product)
- What? GNP minus depreciation.
- Formula: NNP = GNP – Depreciation.
- Purest
Income Measure:
Accounts for both international income and asset wear.
- Per
Capita Income =
NNP ÷ Population.
- Example: If India’s NNP is ₹80 lakh crore and population is 1.4 billion, per
capita income ≈ ₹57,143.
Key
Differences:
- GDP
vs. GNP:
- GDP
= Production within borders (location-based).
- GNP
= Income earned by residents (ownership-based).
- NDP
vs. NNP: Both
adjust for depreciation, but NDP is domestic, NNP includes global income.
India’s
Unique Case:
- GNP
< GDP: Due to
trade deficits and foreign debt interest.
- Service-Driven
Growth: Services
contribute 65% to GDP growth, but 60% of jobs are still in agriculture.
Why
Depreciation Matters:
- Affects
NDP/NNP → impacts per capita income.
- Governments
use depreciation rates as policy tools (e.g., higher rates to boost
vehicle sales).
2015
Revisions:
- India
updated its base year (reference for price comparisons)
to 2011-12 for accurate economic data.
- Changed
methodology to include newer sectors (e.g., telecom, IT) for better growth
measurement.
Takeaway:
- GDP =
What’s made here.
- GNP =
What’s earned by citizens (here + abroad).
- Subtract
depreciation for “net” measures (NDP/NNP).
- NNP ÷
Population = Average income (but varies due to depreciation policies).
🌟 Fun Fact: If you earn ₹1 lakh in Dubai and send it home, it boosts India’s GNP but not GDP! 🌟