Economy basics: General Awareness (GK) Notes for CMAT

Economy Basics – CMAT General Awareness

(Study notes for the Common Management Admission Test – General Awareness section)

1. Simple Explanation

Economy is the system of production, distribution, and consumption of goods and services in a society.

Micro‑economics looks at individual markets (price of a loaf of bread, wages of a worker).
Macro‑economics studies the whole economy (national income, inflation, unemployment).

The key idea: All economic activities are driven by the scarcity of resources and the choices people make to allocate them.

2. Key Points

Concept	What it Means	Why it Matters for CMAT
Gross Domestic Product (GDP)	Total value of all final goods/services produced within a country in a period.	Indicator of economic growth.
GDP Components (Expenditure approach)	(GDP = C + I + G + (X - M)) C – Consumption I – Investment G – Government spending X‑M – Net exports	Helps understand which part drives growth.
Real vs. Nominal GDP	Nominal uses current prices; Real adjusts for inflation.	Real GDP shows true growth.
Inflation	Sustained rise in general price level.	Affects purchasing power, interest rates.
Consumer Price Index (CPI)	Weighted average of prices of a basket of goods.	Basis for inflation calculation.
Unemployment Rate	(\frac{\text{Number of unemployed}}{\text{Labor force}}\times100)	Gauge of labour market health.
Fiscal Policy	Government’s use of spending and taxation.	Influences aggregate demand.
Monetary Policy	Central bank’s control of money supply & interest rates.	Controls inflation & growth.
Interest Rate	Cost of borrowing money.	Influences investment & consumption.
Exchange Rate	Value of one currency relative to another.	Impacts exports, imports, inflation.
Business Cycle	Repeated pattern of expansion, peak, contraction, trough.	Context for economic indicators.

Tip: In CMAT, questions often ask you to interpret data from GDP growth charts, CPI tables, or policy announcements.

3. Worked Example

3.1 Calculating GDP (Expenditure Approach)

Given

Consumption (C) = ₹30,000 crore
Investment (I) = ₹8,000 crore
Government spending (G) = ₹5,000 crore
Exports (X) = ₹4,000 crore
Imports (M) = ₹3,000 crore

Find: GDP

Solution
[ \begin{aligned} GDP &= C + I + G + (X - M) \ &= 30{,}000 + 8{,}000 + 5{,}000 + (4{,}000 - 3{,}000) \ &= 30{,}000 + 8{,}000 + 5{,}000 + 1{,}000 \ &= 44{,}000 \text{ crore} \end{aligned} ]

Interpretation

GDP = ₹44,000 crore.
If next year GDP rises to ₹50,000 crore, growth rate ≈ (\frac{50-44}{44}\times100 = 13.64%).

3.2 Calculating Inflation (CPI Method)

CPI data (base year 2020 = 100)

Item	Weight	2020 Price	2021 Price
Bread	25%	₹40	₹45
Milk	15%	₹30	₹35
Gasoline	20%	₹200	₹210
Others	40%	₹100	₹110

Step 1: Compute CPI for 2020 and 2021

[ \text{CPI}{2020} = \sum (\text{Weight} \times \text{Price}{2020}) = 100 ; (\text{by definition}) ]

[ \text{CPI}_{2021} = 0.25\times45 + 0.15\times35 + 0.20\times210 + 0.40\times110 = 112 ]

Step 2: Calculate inflation rate

[ \text{Inflation} = \frac{\text{CPI}{2021} - \text{CPI}{2020}}{\text{CPI}_{2020}}\times100 = \frac{112-100}{100}\times100 = 12% ]

Interpretation

Prices rose by 12% from 2020 to 2021.

4. Quick Revision Summary

Topic	Quick Facts
GDP	Total market value of final goods/services. Use (C+I+G+X-M).
Real GDP	Adjusts for price changes; shows true growth.
Inflation	Rise in price level; measured via CPI or PPI.
CPI	Weighted basket of consumer goods; base year = 100.
Unemployment	(\frac{\text{Unemployed}}{\text{Labour force}}\times100).
Fiscal Policy	Expansionary (spend more, tax less) → ↑ demand.
Monetary Policy	Lower rates → cheaper credit → ↑ investment & spending.
Business Cycle	Expansion → Peak → Contraction → Trough.
Exchange Rate	Affects imports/exports; depreciation boosts exports.

Remember

Macro indicators (GDP growth, inflation, unemployment) are the “pulse” of the economy.
Policy tools (fiscal & monetary) are used to manage these indicators.

Use this cheat‑sheet to quickly recall definitions, formulas, and their relevance in CMAT questions. Good luck