ECO100Y5 Chapter Notes - Chapter 4: Price Elasticity Of Demand, Demand Curve, Price Drop

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Demand is elasic when qd is responsive to change in price. Demand is inelasic when qd is unresponsive to change in price. It is usually beter to know percentage change in prices of various products rather than ixed amount. ); measure of responsiveness of qd to change in commodity"s price. This measure is called price elasicity of demand / demand elasicity. Increase in price associated with decrease in quanity. Elasicity is 0 when price leads to no change in qd (verical demand curve: means consumers do not alter consumpion when price changes. Availability of subsitutes and ime period under consideraion. Total expenditure depends on price elasicity of demand. Change in total expenditure depends on relaive changes in price and quanity. % change in price new old/average (new + old/2)/new old/average (new + old/2) If supply curve is verical, qs does not change as price changes; elasicity = 0. If supply curve is horizontal, ininite elasicity of supply.

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unitary elastic demand

1. __________________ A measure of consumersâ sensitivity or responsiveness to changes in the price of a good or service.

2. ___________________ When the percentage change in price (in absolute value) is more than the percentage change in quantity demanded (in absolute value).

3. ___________________ When the percentage change in quantity demanded (in absolute value) is more than the percentage change in price (in absolute value).

4. ___________________ When the percentage change in quantity demanded (in absolute value) is just equal to the percentage change in price (in absolute value).

5. ___________________ Total amount paid to a producer for a good or service P * Q.

6. ___________________ The effect on total revenue of a change in price, holding quantity constant.

7. ___________________ The effect on total revenue of a change in quantity, holding price constant.

8. ___________________ An elasticity calculated over an interval of a demand curve or demand schedule.

9. ___________________ Elasticity at a specific price or point on a demand curve.

10. ___________________ A measure of how responsive quantity demanded is to a change in income, all other things constant.

11. ___________________ A measure showing how responsive the quantity demanded of one good is to changes in the price of another good, other factors constant.

12. ___________________ The additional revenue received by producing and selling one more unit of output.

13. ___________________ Units of output that could have been sold at a higher price had the firm not lowered its price to sell additional (marginal) units.

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Discussion #1

The law of demand states that a fall in the price of a good raises the quantity demanded, and the increase in price leads to a decrease in quantity demanded. The price elasticity of demand measures the responsiveness of the quantity demanded to a change in price. Demand for a good is said to be elastic if the quantity demanded responds substantially to changes in the price, and the percentage change in quantity demanded is greater than the percentage change in price. Demand is said to be inelastic if the quantity demanded responds only slightly to changes in the price, which indicates that the percentage in price is greater than the percentage in quantity demanded.

However, the extent of responsiveness of quantity demanded to a change in price depends on the nature of a particular good or service in the market. The price elasticity of demand partly depends on the availability of close substitutes. When a large number of substitutes are available, consumers respond to a higher price of a good by buying more of the substitute goods and less of the relatively more expensive good. In addition, goods or services that are considered necessities tend to have less elastic (more inelastic) demand, whereas goods or services that are considered luxuries have more elastic (less inelastic) demands.

Explain why the demand for the good or service provided by the organization you work for is elastic or inelastic. How does this influence pricing decisions?
Provide examples on how the availability of close substitutes affects price elasticity of demand.
Give specific examples of necessities or luxuries, and explain how they affect price elasticity of goods or services.

Please answer ALL bulletins and place the answers under the correct bulletin.

The demand curve for a good is very unlikely to be perfectly vertical because

A) scarcity and limited income restrict the ability of consumers to afford goods as they become very expensive.
B) as the price of a good rises to high enough levels, the incentive for other suppliers to invent new substitutes for the good increases.
C) consumers generally do not care about the price of the goods they consume.
D) both a and b are true.

As the period for firms to expand output is lengthened, the elasticity of the market supply curve will

A) approach zero.
B) increase.
C) decrease.
D) remain the same since time does not affect the elasticity of market supply.

The price elasticity of demand for automobiles measures the responsiveness of

A) consumer purchases to a change in the price of automobiles.
B) consumer purchases to a change in the quality of automobiles.
C) supplier production levels to a change in the price of automobiles.
D) consumer purchases of automobiles to a change in their income.

Which of the following is true regarding the price elasticity of demand?

A) Demand is generally more elastic in the long run than in the short run.
B) Along a single demand curve, demand elasticity decreases as you move down the curve (to lower prices).
C) a flatter demand curve (has a less steep slope) is relatively more elastic than a demand curve that has a steeper slope.
D) All of the above are true.

5. (Answer ONE of the Following Question)

Economists maintain that the price of a product does not affect demand. How can this be true?
National defence is considered a public good because there appear to be no limits to the nonrivalry-in-consumption characteristic, and exclusion of nonpayers is impossible. Are there any other goods that so perfectly meet both public goods criteria?
Congressman Local stuff always votes for a balanced budget amendment to the U.S. Constitution. He also always votes for spending bills supported by the leadership of his political party. Is this rational?

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ECO100Y5 Chapter Notes - Chapter 4: Price Elasticity Of Demand, Demand Curve, Price Drop

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