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Key Terms to Know Before Studying

Learn these words first β€” the chapter will become very easy

⏱ 8 min read ✎ 1 quick-check questions Lesson 1 of 14
✎ Quick check

Economics uses some special words. If you know them before you start, every paragraph of the chapter will make sense. Each term below has a simple meaning and a daily-life example.

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Practise these words with Flashcards, the Match game or search them in the Glossary.

All key terms

TermEasy meaningExample
MarketAny place or system where buyers and sellers meet to trade.Empress Market, Daraz app, stock exchange
Buyer / ConsumerThe person who pays money to get something.You buying a burger
Seller / Producer / FirmThe person or business that makes or sells things.A poultry farmer, KFC
GoodA physical thing you can touch.Rice, phone, car
ServiceWork done for you (not a thing).Haircut, tuition, doctor visit
Price (P)The money paid for one unit of a good.Rs. 500 per kg of chicken
Quantity (Q)How many units (kg, tons, pieces).20 kg, 10 tons
DemandWish to buy + money to buy + willingness to pay.You want a phone AND have money AND will pay
Quantity demandedThe exact amount people buy at ONE particular price.At Rs. 400, 20 kg is demanded
SupplyThe amount sellers offer for sale at a price.Farmer brings 300 tons to market
StockGoods produced but kept in store, not offered for sale.700 tons kept in warehouse
ScheduleA table showing prices and quantities.Price 500 β†’ 10 kg; 400 β†’ 20 kg
CurveA graph line drawn from the schedule.Downward demand line D
X-axis / Y-axisHorizontal line (Quantity) / Vertical line (Price).In economics, Price is always on the Y-axis
Ceteris paribusLatin: β€œother things remaining the same.” We change only ONE thing and keep all else fixed.Only price changes; income, taste stay same
Inverse relationshipWhen one goes UP, the other goes DOWN.Price ↑ β†’ quantity demanded ↓
Direct relationshipBoth go UP together or DOWN together.Price ↑ β†’ quantity supplied ↑
SubstituteA good used instead of another.Tea vs coffee; butter vs margarine; Pepsi vs Coke
ComplementGoods used together.Car and petrol; tea and cups; printer and ink
Normal goodDemand goes UP when income goes up.Branded clothes, meat
Inferior goodDemand goes DOWN when income goes up (negative income effect).Cheap low-quality bread, local bus
IncomeMoney a person earns.Monthly salary
Purchasing powerHow much your money can buy.Rs. 1,000 buys less when prices rise
EquilibriumBalance point where quantity demanded = quantity supplied.QD = QS = 10 tons at Rs. 30
Surplus (excess supply)More goods offered than people want to buy (QS > QD).Unsold mangoes at end of day
Shortage (excess demand)People want more than what is available (QD > QS).Sugar shortage, long queues
Input / Raw materialThings used to make a product.Cotton for cloth, steel for cars
Cost of productionTotal money a firm spends to make goods.Wages + raw material + electricity
Indirect taxTax put on goods (e.g. sales tax) – raises the seller's cost.GST on products
SubsidyMoney help given by government to producers – lowers cost.Fertilizer subsidy for farmers
Perishable goodSpoils quickly, cannot be stored long.Milk, fruit, vegetables
Durable goodLasts long, can be stored.Motorbike, printer, mobile phone
Price floor (minimum price)Lowest legal price set by government.Wheat support price, minimum wage
Price ceiling (maximum price)Highest legal price set by government.Government-fixed price of flour
Buffer stockGoods the government buys and stores to keep prices stable.Govt wheat stored in godowns
Opportunity costThe value of the next best thing you give up.Money spent on storing wheat could have built a school
Elasticity (basic idea)How strongly quantity reacts to a price change. Inelastic = reacts very little.Salt demand is inelastic
CartelA secret group of sellers/buyers who agree together to control prices (often illegal).Sugar mills agreeing not to buy cane
HoardingKeeping goods off the market on purpose to raise price later.Hiding cotton/sugar in stores
E-businessBuying, selling, and sharing business info through the internet.Daraz, Amazon, Foodpanda
Brick-and-mortarA physical shop/building business.A shop in a mall

βœ… Key points to remember

  • Demand = desire + ability (money) + willingness to pay.
  • Ceteris paribus = other things remaining the same.
  • Price ↑ β†’ quantity demanded ↓ (inverse); price ↑ β†’ quantity supplied ↑ (direct).
  • Substitutes are used instead of each other; complements are used together.
  • Surplus: QS > QD. Shortage: QD > QS.

✎ Quick check

Answer to see results
Question 1
A good with a negative income effect is called:
Why? Income ↑ β†’ buy less of it.
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