ECON 202 Lecture Notes - Lecture 10: Demand Curve, Negative Number, Normal Good

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cerisegiraffe538

13 Jul 2015

School

Texas A&M University

Department

Economics

Course

ECON 202

Professor

Ajalavat Viriyavipart

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Document Summary

Econ 202: principles of microeconomics - lecture 10: elasticity: the responsiveness of. Elasticity: a measure of how much one economic variable (such as quantity demanded or supplied) responds to changes in another economic variable (such as price). This allows business managers and policymakers to calculate the responsiveness of the quantity of a product demanded or supplied when the price changes. Price elasticity of demand: the responsiveness of the quantity demanded to a change in price, measured by dividing the percentage change in the quantity demanded of a product by the percentage change in the product"s price. Price elasticity of demand must be measured using percentage changes. This is so because percentage changes do not depend on specific units of measurement (i. e. dollars, cents, etc ). Price elasticity of demand = percentage change in quantity demanded percentage change in price. Price elasticity of demand is not the same thing as the slope of the demand curve.

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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.

When quantity demanded decreases in response to a change in price,

A. the demand curve shifts to the right.
B. the demand curve shifts to the left.
C. there is a movement down along the demand curve.
D. there is a movement up along the demand curve.
E. the supply curve shifts to the right.

The price elasticity of demand is the measure of the responsiveness of the demand for a good to a percentage change in the price of that same good. When the demand for a good changes due to an increase or decrease in the price of the good, it can be said that the good has a price elastic demand. On the other hand, a good whose demand is not significantly affected by a change in the price levels is price inelastic. For example, luxury goods are usually price elastic because these are not something that most people really need. Thus, when the price of luxury goods increases, the demand for such goods falls. Goods that fall within the latter category are usually the basic necessities such as food and prescription medicine. Even when these types of goods become pricier, most people would find ways to afford them because they need those items to survive.

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ECON 202 Lecture Notes - Lecture 10: Demand Curve, Negative Number, Normal Good

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