ECON 1B03 Lecture Notes - Lecture 5: Demand Curve, Final Good, Hyperbola

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16 Oct 2018

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ECON 1B03 Full Course Notes

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Elastic demand : a change in p leads to a proportionately larger change in qd. Demand is very responsive to a price change. Percentage change in qd > percentage change in p. Perfectly elastic demand : a change in p leads to an infinitely great change in qd. Demand is extremely responsive to a price change. A good with so many substitutes that the price of one changes, people could easily find a cheaper substitute causing the demand for the original to virtually disappear. Unit elastic : a change in p leads to a proportionately equal change in qd. Percentage change in p = percentage change in qd. It has to be non-linear no matter where you are on the curve, tr will always be the same, max value. Now this means that any price and quantity combinate the revenue will be the same (blue and green rectangle)

Related Questions

1. The concept of price elasticity of demand measures:

a. the slope of the demand curve.

b. the number of buyers in a market.

c. the extent to which the demand curve shifts as the result of a price decline.

d. the sensitiveness of quantities demanded to price changes.

2. When the percentage change in price is less than the resulting percentage change in quantity demanded:

a. demand is elastic.

b. demand is inelastic.

c. demand is unit elastic.

d. none of the above.

3. The elasticity of demand:

a. will be the same at each price-quantity combination on a stable demand curve.

b. tends to be elastic in high-price ranges and inelastic in low-price ranges.

c. tends to be inelastic in high-price ranges and elastic in low-price ranges.

d. is infinitely large for a perfectly inelastic demand curve.

4. Suppose that as the price of Y falls from $2.00 to $1.80 the quantity of Y demanded increases from 110 to 121. It can be concluded that the price elasticity of demand is: _______.

5. Total revenue rises as the price of a good increases if price elasticity of demand is:

a. unitary elastic

b. perfectly inelastic.

6. The demand for such products as salt, bread, and electricity tend to be:

a. relatively price elastic.

b. relatively price inelastic.

c. of unit price elasticity.

d. perfectly price elastic.

coffeeelephant81

5. We would expect that a fall in the labor supply will have a proportionately smaller effect on the market wage rate when:

a. workers can easily be replaced by capital goods

b. the product is produced in a perfectly competitive industry

c. the product produced in the industry has very few substitutes

d. labor represents a relatively small portion of total costs

4. Suppose a new technology allows firms to substitute mechanical tomato pickers for farm laborers. As a result, the demand curve for farm laborers will:

a. become less elastic

b. become more elastic

c. shift to the right

d. not be affected

3. What does the marginal physical product equal when the amount of labor goes from 10 to 11?

Labor input (workers/day)_____ total physical product (output/day)

10 ________________________500

11_________________________600

12________________________ 690

13 ________________________760

14 ________________________800

a. 54.5

b. 100

c. 600

d. 500

1. A farm's marginal factor cost describes:

a. the change in total foxed cost that reseults from hiring one more unit of input

b. the increase in the firm's total revenue as one more unit of output is sold

c. the change in total variable cost that results from th production of an extra unit of output

d. the change in total cost that results from using one more unit of an input

redmammoth172

PLEASE HELP WITH ONLY THE BOLDED QUESTION THANK YOU

Consider the market for new, single-family homes in New Orleans. The general demand function for new housing in New Orleans is estimated to be Qd =15-2P+0.05M+0.10R where Qd is the monthly quantity demanded, P is the price per square foot, M is average monthly income in New Orleans, and R is the average monthly rent for a three-bedroom apartment in New Orleans. Qd is measured in units of 1,000 square feet per month. 1. New housing in New Orleans is a(n) __________________ (normal, inferior) good. How can you tell from the general demand function? 2. New housing and three-bedroom apartments are _________________ (substitutes, comple- ments) in New Orleans. How can you tell from the general demand function? 3. If average monthly income is $1,500 and the monthly rental rate for three-bedroom apart- ments is $700, then the demand function for new housing in New Orleans is Qd = _____________________________________. 4. Graph the demand curve for new housing in New Orleans on the axes provided below. Label the demand curve D0. 5. What happens to demand when the following changes occur? a. b. c. d. e. The price of the commodity rises. Income decreases and the commodity is normal. Income decreases and the commodity is inferior. The price of a complement good increases. The price of a substitute good decreases. The general supply function for new housing in New Orleans is estimated to be Qs =96+2P-10PL -4PK where P is the price per square foot of new housing in New Orleans, PL is the average hourly wage rate for construction workers, and PK is the price of capital (as measured by the average rate of interest paid on loans to home builders). Qs is measured in units of 1,000 square feet per month. 6. Does it make sense for PL and PK to have negative coefficients in the general supply func- tion? Explain why or why not. 7. If the average hourly wage rate for construction workers is $10 per hour and the average rate of interest on loans to builders is 9 percent (i.e., PK = 9), then the supply function for new housing is Qs = ______________________. 8. Graph the supply curve for new housing in the graph below. Label supply S0. 9. Other things remaining the same, what would happen to the supply of a particular commodity if the following changes occur? a. The price of the commodity increases. b. Government regulators outlaw the use of a technology that enables the good to be produced at a significantly lower cost. c. The prices of inputs used to produce the commodity decrease. d. The price of a commodity that is a substitute in production increases. e. Managers expect the price of the good to fall in the near future. f. As the cost of capital rises, firms in the industry stop purchasing plant and equip- ment, which allows depreciation to diminish the productive capacity in the indus- try. 10. Solve mathematically for equilibrium price and quantity. Show your work: PE = $__________ per square foot. QE = __________ square feet per month (in 1,000s). 11. Do your supply and demand curves intersect at PE and QE found in question 8 above? Should they? 12. In equilibrium found in question 8, compute total consumer, producer, and social surpluses: CS = $____________ PS = $____________ SS = $____________ 13. Suppose New Orleans suffers a serious recession that causes average monthly income to fall from $1,500 to $1,100 per month. If other things remain the same, the demand for new hous- ing in New Orleans is now: Qd = _______________________. Plot this new demand curve in the figure below. Label it D'. 14. Suppose that because of the recession in New Orleans, the wage rate for construction workers falls to $8 per hour. If other things remain the same, the supply of new housing in New Orle- ans is now: Qs = _______________________. Plot this new supply curve in the figure. Label the new supply curve S'. 15. After income falls to $1,100 and wages fall to $8, new equilibrium price and quantity are PE = $__________ per square foot QE = __________ square feet per month (in 1,000s) 16. Determine the effect upon equilibrium price and quantity sold if the following events occur in a particular market: a. The price of a substitute good (in consumption) decreases. b. Consumersâ income increases and the good is inferior. c. Government regulators decide to outlaw a cost-reducing technological process in order to protect the environment. d. The price of a complement good (in production) increases. e. The price of inputs used to produce the good decrease. f. Consumers expect that the price of the good will fall in the near future. g. It is widely publicized that consumption of the good is helpful in prevent- ing cancer. h. The price of a substitute good (in production) decreases. 17. Suppose that a pair of events from problem 15 occur simultaneously. For each of the pairs of events indicated below, perform a qualitative analysis to predict the direction of change in either the equilibrium price or the equilibrium quantity. Explain why the change in one of these two variables is indeterminate. a. Both a and h in problem 15 occur simultaneously. b. Both b and e in problem 15 occur simultaneously. c. Both d and g in problem 15 occur simultaneously. d. Both f and c in problem 15 occur simultaneously.

ECON 1B03 Lecture Notes - Lecture 5: Demand Curve, Final Good, Hyperbola

ECON 1B03 Full Course Notes

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