Scarcity: unlimited wants, limited resources
Scarcity means we do not have enough resources to satisfy all our wants.
- Wants never end. Once you get a cycle, you want a better phone.
- Resources are limited: money, time, land, water, machines and workers.
- Resources also have other uses. A piece of land can grow rice, hold a school or become a road.
Scarcity is not the same as poverty. Even a rich person has only 24 hours a day. Even a rich country has limited land.
Choice and opportunity cost
Because of scarcity we must choose. Every choice means giving something up.
Opportunity cost = the value of the next best option that you give up when you make a choice.
Worked example
Riya has ₹200. Options: a book (her first choice), a movie (second choice), a snack (third). She buys the book. Opportunity cost = the movie (only the next best, not all other options).
Worked example with numbers
A shop owner can work 1 hour in her shop and earn ₹300, or take a 1-hour tuition job for ₹250. If she chooses the shop, the opportunity cost is ₹250.
What economists do
Economics studies how people, businesses and governments use scarce resources to meet their wants.
- Observe: collect data on prices, jobs, crops, incomes.
- Explain: find cause and effect. Why did onion prices rise? Maybe the rains failed.
- Predict: what will happen if petrol prices rise?
- Advise: suggest policies to the government, firms and families.
Economists study small units like a family or a shop (microeconomics) and the whole country, like total income and prices (macroeconomics).
Central problems: what, how and for whom to produce
- What to produce and how much? More food grain or more cars? More schools or more roads?
- How to produce? With more workers (labour-intensive) or more machines (capital-intensive)? A labour-intensive method creates jobs; a machine method may be faster.
- For whom to produce? How is the output shared? Who gets how much depends on income, and on what the government provides.
Market, planned and mixed economies
| Type | Who answers the three questions? | Plus | Minus |
|---|---|---|---|
| Market (capitalist) economy | Buyers, sellers and prices; firms owned privately and run for profit | Choice, efficiency, new ideas | The poor may be left out; big gaps in income |
| Planned (socialist) economy | The government owns most resources and plans production | Focus on equality and basic needs | Slow, less choice, less innovation |
| Mixed economy (India) | Both private firms and the government | Growth with care for the poor | Needs good balance and honest rules |
Welfare state
A welfare state is one where the government takes responsibility for the basic well-being of all citizens: free or cheap schooling, health care, food rations, pensions and help in bad times. In India, midday meals in schools and the public distribution system (ration shops) are examples.
Try it at home
Write down 10 things you want this month and their prices. Take your real pocket money. Cross out items until the total fits. For each item you kept, write the next best item you gave up. That list is your opportunity cost.
Key formulas and definitions
- Scarcity: limited resources compared with unlimited wants.
- Opportunity cost = value of the next best option given up.
- Central problems: What? How? For whom?
- Labour-intensive: uses more workers; capital-intensive: uses more machines.
- Market economy: private firms and prices decide.
- Planned economy: government decides.
- Mixed economy: both private and government sectors (India).
- Welfare state: government ensures basic needs for all.
Worked examples
1. A student can spend an evening studying (expected +10 marks) or at a party. She chooses the party. What is the opportunity cost?
The 10 extra marks she could have earned by studying (the next best option given up).
2. Ravi can earn ₹500 by working, ₹400 by tutoring, or ₹300 by selling old books. He decides to work. What is his opportunity cost?
Only the next best option counts: tutoring, ₹400. Not ₹400 + ₹300.
3. 10 workers: each can make 10 bags of wheat or 5 rolls of cloth. If 6 make wheat, how much of each is produced?
Wheat = 6 × 10 = 60 bags. Cloth = (10 − 6) × 5 = 20 rolls.
4. In the same example, moving 1 more worker to wheat gives how much extra wheat and what is its opportunity cost?
Extra wheat = 10 bags. Cloth falls by 5 rolls. So the opportunity cost of 10 bags of wheat is 5 rolls of cloth (1 bag costs ½ roll).
5. A government decides to build more hospitals and fewer flyovers. Which central problem is it answering?
What to produce (and how much of each).
6. Why is India called a mixed economy? Give one example of each sector.
Both government and private firms produce goods. Government: Indian Railways. Private: a private car company. The government also runs welfare schemes like ration shops.
Common mistakes
- Adding up all options given up as opportunity cost. Only the single next best option counts.
- Thinking scarcity means poverty. Even rich people face scarcity of time and resources.
- Thinking a mixed economy means 'half-half' exactly. It means both sectors exist and share the work.
- Thinking opportunity cost is always money. It can be time, marks, fun or another good.