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Needs, Wants & Opportunity Cost

The difference between needs and wants, and the cost of every choice.

💡 Year 7 💰 Microeconomics ⭐ ★

Needs, Wants, and the Cost of Every Choice

Here's a thought experiment: you have £50. You can pay for food this week (a need) or buy concert tickets (a want). Whatever you choose, you give up the other. This unavoidable trade-off is what economists call opportunity cost — the hidden price tag on every decision.

✅ Needs

Essentials for survival: food, water, shelter, basic clothing, healthcare. Without these, life cannot be sustained.

🛍️ Wants

Everything beyond survival: smartphones, designer shoes, holidays, streaming services. Unlimited in variety and number.

💸 Opportunity Cost

The value of the next best alternative foregone when a choice is made. Always implicit in every decision.

⚖️ Rational Choice

Economists assume people weigh up costs and benefits and choose the option where benefits exceed costs most.

🏀 The LeBron James Analogy: LeBron James could mow his own lawn in an hour. But that hour of his time is worth $10,000 in endorsements. So he hires a gardener for £25. His opportunity cost of mowing ($10,000) vastly exceeds the gardener's wage. Even the world's best at a task should outsource if opportunity cost is high enough.

💡 Opportunity Cost is EVERYWHERE:
• A government building a new motorway gives up the hospitals that money could have built.
• A firm investing in a new machine gives up the dividend it could have paid shareholders.
• You're paying an opportunity cost right now — the alternative use of your revision time!

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💡 How to read economic diagrams: Always label axes (Price on Y-axis, Quantity on X-axis for most diagrams). Shifts represent changes in non-price factors; movements along a curve represent price changes. Equilibrium is where curves intersect.

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💡 Exam Tip: Show all working in economics calculations. Use the correct formula, substitute values clearly, state units, and interpret your result in economic terms.