Which statement best explains how elasticity and incentives work together?
The best statement is: 'An elastic good, such as a game, is more likely to respond to incentives.' Because elastic goods are price-sensitive, incentives like discounts or price cuts change the quantity demanded far more than they do for inelastic goods such as necessities.
The answer
The correct statement is: 'An elastic good, such as a game, is more likely to respond to incentives.'
Elasticity measures how sensitive buyers are to a change in price. An elastic good is one where a small change in price causes a large change in the quantity people buy. An incentive in economics is anything that motivates a behavior — a discount, a sale, a coupon, a price cut. Put the two ideas together and the logic is direct: if buyers are highly responsive to price (elastic), then a price-based incentive will produce a big swing in how much they purchase. If buyers barely respond to price (inelastic), the same incentive produces only a small swing.
A video game is a good example of an elastic good: it's a non-essential, discretionary purchase with many substitutes and no urgency. Drop the price 20% and sales can jump sharply. That responsiveness is exactly what makes incentives effective.
Why the other options are wrong
Typical distractors in this question include:
- 'An inelastic good is more likely to respond to incentives.' This is backwards. Inelastic goods — insulin, gasoline, basic groceries, utilities — are things people buy in roughly the same quantity regardless of price. A discount barely moves demand because buyers need the item and have few alternatives. So incentives are least effective on inelastic goods.
- 'Elasticity and incentives are unrelated.' They are tightly linked: elasticity is precisely the measure of how strongly demand will respond to a price incentive.
- 'Incentives only work on necessities.' The opposite. Necessities are usually inelastic, so incentives work poorly on them. Incentives work best on discretionary, elastic goods like games, restaurant meals, or luxury items.
The bigger picture: reading the demand curve
The reason this works comes straight from the demand curve. For an elastic good, the demand curve is relatively flat — a small vertical drop in price traces a large horizontal increase in quantity demanded. For an inelastic good, the curve is relatively steep — even a large price change moves quantity only a little.
What makes a good elastic? A few factors:
- Substitutes available. If buyers can easily switch to a competitor, they'll respond strongly to price. Games, brands of soda, and airlines are elastic.
- Necessity vs. luxury. Luxuries and wants are elastic; necessities are inelastic.
- Share of income. Big-ticket discretionary items are more elastic.
- Time horizon. Demand becomes more elastic over time as buyers find alternatives.
This is why businesses and policymakers care. A store runs a sale (a price incentive) on elastic goods to boost volume, because the extra units sold more than make up for the lower price. But it wouldn't cut the price of an inelastic staple to drive volume — buyers wouldn't buy much more, and revenue would just fall. Likewise, a government taxing an inelastic good (like cigarettes) collects steady revenue because demand barely drops, while a tax on an elastic good would sharply reduce sales. Understanding which goods respond to incentives — and why — lets you predict how any price change will ripple through demand.
Frequently asked
What is price elasticity of demand?
Price elasticity of demand measures how much the quantity demanded of a good changes when its price changes. It is calculated as the percentage change in quantity demanded divided by the percentage change in price. A value greater than 1 means demand is elastic (responsive); less than 1 means inelastic.
What is the difference between elastic and inelastic goods?
For an elastic good, a small price change causes a large change in quantity demanded — buyers are price-sensitive. For an inelastic good, even a big price change causes only a small change in quantity — buyers keep purchasing it regardless, usually because it is a necessity with few substitutes.
How do incentives affect consumer behavior?
Incentives like discounts, sales, and coupons lower the effective price, motivating people to buy more. Their effect depends on elasticity: for elastic goods the response is large, so incentives work well; for inelastic goods the response is small, so the same incentive changes little.
Give an example of an elastic good.
Video games, restaurant meals, airline tickets, brand-name sodas, and luxury clothing are elastic goods. They are discretionary purchases with many substitutes, so buyers respond strongly to price changes — a discount can sharply increase how many are sold.
Why are necessities usually inelastic?
Necessities such as insulin, gasoline, water, and basic food have few substitutes and are hard to do without. People must keep buying roughly the same amount even when the price rises, so quantity demanded barely changes — the defining trait of an inelastic good.