Macroeconomic Indicators and Multiplier Effect Explained

Essential Macroeconomic Formulas

• GDP per capita = GDP / Population
• Green GDP = GDP – Environmental cost
• Real GDP = (Nominal GDP / GDP Deflator) × 100
• Real Economic Growth Rate = (New Real GDP - Old Real GDP) / Old Real GDP × 100%
• GNI = GDP + Net Income from Abroad (Income from abroad - Income sent abroad)
• GDP = GNI - Net Income from Abroad

Note: For GDP to be greater than GNI, Net Income from Abroad (NIA) must be negative, meaning income sent abroad exceeds income received from abroad.

Methods of Measuring National Income

• Expenditure Approach: Summing expenditure by sectors (C + I + G + X - M).
• Income Approach: Summing income earned by factors of production (Wage + Rent + Interest + Profit).
• Output Approach: Summing the value of all final goods and services produced in primary, secondary, and tertiary sectors.

The Multiplier Effect

Any increase in a component of Aggregate Demand (AD) causes a larger ultimate increase in GDP.

Multiplier Calculation

• MPC (Marginal Propensity to Consume) = Change in C / Change in Y
• Multiplier = 1 / (1 - MPC)
• Leakages (MPL) = MPS + MPT + MPM
• Multiplier Formula: 1 / (MPS + MPT + MPM)

Example: If MPC = 0.8, an initial $100 increase leads to a total income increase of $500 (100 × 1 / (1-0.8)).

Unemployment Nuances

• Hidden Employment: Individuals claim unemployment benefits while working, leading to an overestimation of unemployment.
• Hidden Unemployment: Long-term unemployed individuals stop searching for work and are removed from the labor force statistics.

Aggregate Demand and Price Level Effects

• Wealth Effect: As the Average Price Level (APL) decreases, real purchasing power increases, boosting consumption.
• Net Export Effect: As APL increases, exports become less price-competitive, reducing export revenue.
• Interest Rate Effect: As APL increases, money demand rises, driving up interest rates and reducing Consumption (C) and Investment (I).

Fiscal Policy and Crowding Out

Crowding Out: A situation where increased government spending leads to higher interest rates, causing a reduction in private investment spending, often used to finance government deficits during a recession.