Economic Terms – Study Notes
Program: Jharkhand Police Sub‑Inspector (SI)
Subject: General Awareness & Current Affairs
Topic: Economic Terms
These notes are designed to give you a quick, clear, and concise understanding of the most important economic terms that appear in the SI exam, along with a simple worked example and a rapid‑review section.
1. Simple Explanation
Economics is the study of how societies use scarce resources to produce goods and services and distribute them among people.
In the SI exam you will often be asked to define, explain, or apply the following terms:
- Macro‑economic metrics – measures of the overall health of the economy (GDP, CPI, etc.).
- Policy tools – instruments used by government and central bank to influence the economy (fiscal & monetary policy).
- Market concepts – basic ideas of supply, demand, price, and elasticity.
- Key indicators – numbers that signal inflation, unemployment, growth, etc.
2. Key Economic Terms
| Term | Simple Definition | Why It Matters (SI Context) |
|---|---|---|
| Gross Domestic Product (GDP) | Total value of all final goods & services produced within a country in a year. | Measures national economic performance. |
| Gross National Product (GNP) | GDP + net income from abroad. | Shows total income earned by residents. |
| Gross National Income (GNI) | GNP + net primary income from abroad. | Used to compare living standards. |
| Inflation | General rise in price levels over time. | Affects cost of living and police budget. |
| Deflation | General fall in price levels. | Rare but can signal recession. |
| Consumer Price Index (CPI) | Weighted average price of a basket of consumer goods/services. | Main gauge of inflation. |
| Producer Price Index (PPI) | Prices received by producers for their output. | Indicates upstream price changes. |
| Price‑Level Index (PLI) | Ratio of current price level to a base year. | Foundation for CPI & PPI. |
| Unemployment Rate | % of labor force that is jobless but seeks employment. | Indicator of economic health. |
| Fiscal Policy | Government decisions on taxes & spending. | Directly influences public services. |
| Monetary Policy | Central bank actions (interest rates, reserves). | Controls money supply & inflation. |
| Supply & Demand | Basic market forces that set price. | Useful for explaining price changes. |
| Elasticity of Demand | Responsiveness of quantity demanded to price change. | Helps understand tax & subsidy impacts. |
| Elasticity of Supply | Responsiveness of quantity supplied to price change. | Links production decisions to price. |
| Opportunity Cost | Value of the next best alternative foregone. | Guides budgeting & resource allocation. |
| Fiscal Deficit | Expenditure > Revenue for a fiscal year. | Affects borrowing & interest rates. |
| Current Account Balance | Net trade in goods, services, income, & transfers. | Indicator of external economic health. |
| Foreign Direct Investment (FDI) | Investment in business operations abroad. | Drives economic growth & jobs. |
| Exchange Rate | Value of one currency in terms of another. | Influences import/export prices. |
| Currency Depreciation/Appreciation | Decline/increase in value of a currency. | Affects cost of living & trade. |
Tip: Memorize each term’s definition and why it matters. Use this table as a quick reference.
3. Worked Example – Calculating Inflation Rate Using CPI
Scenario:
CPI for 2023 (base year 2020) is 112.5. CPI for 2024 is 118.0.
Formula:
[
\text{Inflation Rate} = \frac{\text{CPI}{2024} - \text{CPI}{2023}}{\text{CPI}_{2023}} \times 100%
]
Calculation:
- Difference: (118.0 - 112.5 = 5.5)
- Divide by 2023 CPI: (5.5 / 112.5 = 0.0489)
- Convert to percentage: (0.0489 \times 100 = 4.89%)
Answer: The annual inflation rate between 2023 and 2024 is 4.89 %.
Why this matters:
- Inflation influences wage negotiations, pension adjustments, and cost‑of‑living allowances for police personnel.
- Understanding CPI helps interpret news on “inflation is 4.9 % in December”.
4. Quick Revision Summary
| Category | Term | Quick Recall |
|---|---|---|
| Growth Metrics | GDP | Total output of a country. |
| GNP | GDP + income from abroad. | |
| GNI | GNP + net primary income. | |
| Price Indices | CPI | Consumer price basket; inflation gauge. |
| PPI | Producer price basket. | |
| PLI | Ratio of price level to base. | |
| Inflation | Inflation | Rising prices; cost of living ↑. |
| Deflation | Falling prices; potential recession. | |
| Employment | Unemployment Rate | % of |