Economics is a social science that studies how individuals, governments, firms, and nations make choices on allocating scarce resources to satisfy unlimited wants. Derived from the Greek words ‘Oikonomia’ (Oikos meaning house and Nomos meaning custom or law), it originally signified “household management.”
- Adam Smith’s Perspective (1776): Known as the ‘Father of Economics,’ he defined it as the “Science of Wealth” in his book An Inquiry into the Nature and Causes of the Wealth of Nations.
- Alfred Marshall’s Perspective (1890): Shifted the focus to “Human Welfare,” suggesting wealth is a means to an end, not the end itself.
- Lionel Robbins’ Perspective (1932): Introduced the “Scarcity Definition,” viewing economics as a study of human behavior as a relationship between ends and scarce means which have alternative uses.
The Fundamental Problem: Scarcity and Choice
The core of economic study rests on three pillars:
- Unlimited Wants: Human desires are insatiable and recurring.
- Scarce Resources: Resources (Land, Labor, Capital, Entrepreneurship) are limited in supply relative to demand.
- Alternative Uses: Resources can be put to different uses (e.g., land can be used for farming or a factory), necessitating a choice.
Branches of Economics: Micro vs. Macro
Economics is broadly categorized into two branches, a distinction first introduced by Ragnar Frisch in 1933.
| Feature | Microeconomics | Macroeconomics |
| Focus | Individual economic units (Household, Firm). | Economy as a whole (National Income, Inflation). |
| Objective | Price determination and resource allocation. | Full employment and growth of resources. |
| Key Instruments | Demand and Supply. | Aggregate Demand and Aggregate Supply. |
| Other Name | Price Theory. | Income and Employment Theory. |
| Example | Product pricing, consumer behavior. | GDP growth, Fiscal Policy, Unemployment. |
Scope of Economics: Positive vs. Normative
The scope of economics is further defined by its approach to analyzing data and outcomes.
Positive Economics
It deals with “what is” based on facts and figures. It expresses the cause-and-effect relationship without passing value judgments.
- Example: “The current unemployment rate in India is 7.5%.”
- UPSC Fact: Positive statements can be tested or rejected by referring to available evidence.
Normative Economics
It deals with “what ought to be” or “what should be.” It involves value judgments, ethics, and opinions.
- Example: “The government should provide basic healthcare free of cost to all citizens.”
- UPSC Fact: These are subjective and cannot be verified with data alone.
Central Problems of an Economy
Regardless of the economic system, every society must answer three fundamental questions:
- What to Produce? Deciding the types and quantities of goods (Consumer vs. Capital goods).
- How to Produce? Choosing the technique of production (Labor-intensive vs. Capital-intensive).
- For Whom to Produce? Deciding the distribution of national product among various factors of production or segments of society.
Classification of Economies Based on Ownership
The scope of economic activity is heavily influenced by the prevailing economic system.
- Capitalist Economy (Market Economy): Production means are privately owned; the “Invisible Hand” (Price Mechanism) dictates resource allocation. Examples: USA, UK.
- Socialist Economy (Planned Economy): Production means are owned by the State; central planning authorities decide allocation to maximize social welfare. Examples: Former USSR, North Korea.
- Mixed Economy: A coexistence of public and private sectors. The government regulates essential sectors while allowing market forces in others. Example: India.
The Concept of Opportunity Cost
Opportunity cost is the value of the next best alternative foregone when a choice is made. In a world of scarcity, every economic decision involves an opportunity cost.
- Example: If the government spends ₹10,000 crore on defense, the opportunity cost might be the schools or hospitals that could have been built with that same amount.
Significance for Indian Economy
In the Indian context, the scope of economics has evolved from a heavily regulated “Socialist-leaning Mixed Economy” (Pre-1991) to a “Market-oriented Mixed Economy” post-LPG (Liberalization, Privatization, Globalization) reforms.
- Trivia: The term “Hindu Rate of Growth” was coined by Professor Raj Krishna to describe the low annual growth rate (approx. 3.5%) of the Indian economy from the 1950s to the 1980s.
- Key Indicator: The Central Statistics Office (CSO) and National Sample Survey Office (NSSO) were merged in 2019 to form the National Statistical Office (NSO), which is the nodal agency for economic data in India.