ECON101 Midterm: Chapters These notes cover all of chapter 4 and five in detail. Key terms, and concepts incorporated in an easy to follow format. Recommended for studying a midterm.

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lavenderdonkey616

16 Oct 2011

School

University of Waterloo

Department

Economics

Course

ECON101

Professor

Corey Van De Waal

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ECON101 Full Course Notes

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Econ mid term review chapter 4 and 5. The price elasticity of demand is a units-free measure of the responsiveness of the quantity demanded of a good to a change in its price when all other influences on buyers" plans remain the same. Calculating elasticity: the price elasticity of demand is calculated by using the formula: By using the average price and average quantity, we get the same elasticity value regardless of whether the price rises or falls. The ratio of two proportionate changes is the same as the ratio of two percentage changes. The measure is units free because it is a ratio of two percentage changes and the percentages cancel out. Changing the units of measurement of price or quantity leave the elasticity value the same. The formula yields a negative value, because price and quantity move in opposite directions.

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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.

coffeehornet269

Suppose that during the past year, the price of a laptop computer fell from $2,950 to $2,450. During the same time period, consumer sales increased from 430,000 to 619,000 laptops. Calculate the elasticity of demand between these two price–quantity combinations by using the following steps. After each step, complete the relevant part of the table with the appropriate answers. (Note: For decreases in price or quantity, enter values in the Change column with a minus sign.) Original New Average Change Percentage Change Quantity 36.03% Price -18.52% Step 1: Fill in the appropriate values for original quantity, new quantity, original price, and new price. Step 2: Calculate the average quantity by adding the original quantity and the new quantity, and then dividing by two. Do the same for the average price. Step 3: Calculate the change in quantity by subtracting the original quantity from the new quantity. Do the same for the change in price. Step 4: Calculate the percentage change in quantity demanded by dividing the change in quantity by the average quantity. Do the same to calculate the percentage change in price. Step 5: Calculate the price elasticity of demand by dividing the percentage change in quantity demanded by the percentage change in price, ignoring the negative sign. Using the midpoint method, the elasticity of demand for laptops is about .

redjellyfish579

Calculating the price elasticity of demand - A step-by-step guide

Suppose that during the past year, the price of a laptop computer fell from $2,950 to $2,450. During the same time period, consumer sales increased from 430,000 to 619,000 laptops.

1. Calculate the elasticity of demand between these two price quantity combinations by using the following steps. After each step, complete the relevant part of the table with the appropriate answers. (Note: For decreases in price or quantity, enter values in the Change column with a minus sign.)

a. 36.03%

b. 18.02%

c. 277.51%

Price

a. -18.52%

b.-540%

c. -9.26%

Step 1: Fill in the appropriate values for original quantity, new quantity, original price, and new price.

Step 2: Calculate the average quantity by adding the original quantity and the new quantity, and then dividing by two. Do the same for the average price.

Step 3: Calculate the change in quantity by subtracting the original quantity from the new quantity. Do the same for the price change.

Step 4: Calculate the percentage change in quantity demanded by dividing the change in quantity by the average quantity. Do the same to calculate the percentage change in price.

Step 5: Calculate the price elasticity of demand by dividing the percentage change in quantity demanded by the percentage change in price, ignoring the negative sign.

2. Using the midpoint method, the elasticity of demand for laptops is about

a. 0.051

b. 0.97

c. 1.95

d. 3.89

peachmosquito810

ECON101 Midterm: Chapters These notes cover all of chapter 4 and five in detail. Key terms, and concepts incorporated in an easy to follow format. Recommended for studying a midterm.

ECON101 Full Course Notes

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