ECON 1B03 Chapter Notes - Chapter 5: Demand Curve

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ECON 1B03 Full Course Notes

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Denoted e subscript ab, cross prioce elasticity measures the response of qd of a good a to a change in price of good b . E(ab) = % change in qd of good a / % change of good b . Midpoint formula is: e(ab) =[ (q2a q1a) / (q2a + q1a)] / 2 / [(p2b p1b) / (p2b + p1b) / 2] If elasticity is > 0 an increase in p of b will lead to an increase in qd of a: the goods are substitutes. If elasticity is < 0, an increase in p of b will lead to a decrease in qd of a . Example: the price of a soft drink increases from . 99 to . 49 per 2 litre bottle. Demand for a fruit juice increases from 500 to 1000 bottles: q1a = 500, q2a = 1000, p1b = 1. 99, p2b = 2. 49.

Related Questions

1. Clothing retailers often use sales, where some or all products are sold at a discount price, to increase revenue. What does this suggest about the price elasticity of demand for retail clothing?

A) It is elastic.

B) It is inelastic.

C) It is unit elastic.

D) This tells us nothing about elasticity.

2. If demand is inelastic, then increasing price will do what to revenue?

A) It is impossible to say.

B) Decrease

C) Increase

D) Nothing will happen to revenue.

3. If P increases from 200 to 202 and Qd decreases from 50 to 49, what is the price elasticity of demand? ___

4. If elasticity (i.e. price elasticity of demand) is -3, a 1.5% increase in price would lead to what change in quantity demanded?

A) a decrease of 3%

B) a decrease of 4.5%

C) an increase of 1.5%

D) an increase of 3%

5. If you know that the demand curve is given by: Q = 20-2P What is the price elasticity of demand if P = 4?

A) -0.666

B) -0.33

C) -1.33

D) -1.66

1. If there has been a 10% increase in Consumer income between two periods, what was the percentage change in demand for foreign travel? For tobacco products? For flour? (Hint use the income elasticity values in Table 4-4.)

2. Agricultural commodities are known to have a price-inelastic demand and to be necessities. How can this information allow you to explain why the income of farmersfalls (a) after a good harvest? (b) In relation to the incomes in other sectors of the economy?

3. Suppose that the cross-price elasticity of demand between McIntosh and Golden Delicious apples is 0.8, between apple and apple juice is 0.5, between apples and cheese is 0.4, and between apples and beer is 0.1 What can you say about the relationship between each set of commodities?

4. (a) If price of pork increases by 10 percent, by how much does demand for beef change? (b) If price of pork increases by 10 percent, by how much does demand for food change? (hint use the cross-price elasticity values in Table 4-5.)

29. Given the following demand and cost functions, determine the output and sales level that maximize profit.
Demand Function: Q = 25- P; Cost Function: TC = 20+5Q +Q2 (Points : 1) 20 Units
200 Units
5 Units
None of the Above

30. Assume the price of product B, increases from $1 to $1.50. As a result, the quantity demanded of product "A increases from 500 to 600 a month. This indicates that the cross-price elasticity and relationship between the two products. (Points : 1)

.50, Substitutes
.45, Substitutes
.45, Complements
.50, Complements
Products are not related

31. Given the marginal revenue from a product is $15 and the price elasticity of demand is -1.2, what is the price of the product? (Points : 1)

Not enough Information
$8
$88
$42
$68

32. Given the demand function: QD = -10-2.1 P +.62 Y. Where P is price and Y is Income (Points : 1)

For a 1% increase in price, quantity demanded falls by 2.1%
For a 1% increase in price, quantity demanded increases by .62%.
For a 1% decrease in price, quantity demanded increases by 2.72%
None of the above

ECON 1B03 Chapter Notes - Chapter 5: Demand Curve

ECON 1B03 Full Course Notes

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