ECON201 Lecture Notes - Lecture 4: Giffen Good, Externality, Economic Surplus

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redwalrus207

9 Aug 2016

School

University of Waterloo

Department

Economics

Course

ECON201

Professor

Zhen He

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ECON201 Full Course Notes

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A decrease in the price of food, with income and the price of clothing fixed, causes the consumer to choose a different market basket. A decrease in the price of food causes the budget line to rotate outwards. Thus, we can obtain a higher utility level, and if price drops again, budget line rotates outward again. A, b, & d are 3 optimal baskets the only thing that changes is the budget line. If we connect a, b and d we get the price consumption curve. Part (b) gives the individual demand curve, which relates the price of food to the quantity demanded. (points e, g, and h correspond to points a, Price-consumption curve - curve tracing the utility-maximizing combinations of two goods (i. e. , the optimal basket) as the price of one good changes. Individual demand curve - curve relating the quantity of a good that a single consumer will buy to its price.

Related Questions

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.

1) Suppose your grandmother gave you $25 for your birthday and you decided to spend all of it on candy bars and bags of popcorn. The price of candy bars is $1.25 and price of a bag of peanuts is $3.75.

a) Construct a table showing the alternative combinations of the two products that are available.

b) Plot the data in your table as a budget line in a graph. What is the slope of the budget line? What is the opportunity cost of one more candy bar? Of one bag of peanuts?

c) How, in general, would you decide which of the available combinations of candy bars and bags of peanuts to buy?

2) With current technology, suppose a firm is producing 750 screwdrivers daily. Also assume that the least-cost combination of resources in producing those screwdrivers is 15 units of labor, 20 units of land, 4 units of capital, and 3 unit of entrepreneurial ability, selling at prices of $50, $45, $75, and $50, respectively. If the firm can sell these 750 screwdrivers at $2.50 per unit,

a) what is its total revenue?

b) what is its total cost?

c) what is its profit or loss?

d) will it continue to produce screwdrivers?

e) If this firmâs situation is typical for the other makers of screwdrivers, will resources flow toward or away from this product?

3) How will each of the following changes in demand and/or supply affect equilibrium price and equilibrium quantity in a competitive market; that is, do equilibirium price and quantity rise, fall , or are the answers indeterminate because they depend on the magnitudes of the shifts?

a)Supply decreases and demand is constant. Change in eqilibrium price chnage in eqilibrium quantity

b)Demand decreases and supply is constant.

c)Supply increases and demand is constant.

d)Demand increases and supply increases.

e)Demand decreases and supply decreases.

4)Zeke likes to go to music concerts. The number of times per year that he attends concerts depends on both the price of the concerts as well as Zekeâs income and the cost of other types of entertainmentâin particular, how much it costs to go see a movie instead of attending concerts. The three demand schedules in the $60,000 per year and movies cost $10 each. In scenario D2, Zeke's income is also $60,000 per year, but the price of seeing a movie rises to $12. And in scenario D3, Zeke's income goes up to $80,000 per year, while movies cost $12.

a)Using the data under D1 and D2, calculate the cross-elasticity of Zeke's demand for concerts at all three prices. (To do this, apply the midpoints approach to the cross-elasticity of demand.) Is the cross-elasticity the same at all three prices? Are movies and concerts substitute goods, complementary goods, or independent goods?

b)Using the data under D2 and D3, calculate the income elasticity of Zeke's demand for concerts at all three prices. (To do this, apply the midpoints approach to the income elasticity of demand.) Is the income elasticity the same at all three prices? Are concerts an inferior good?

PRICE	D1	D2	D3
50	10	5	12
40	15	10	25
30	25	15	40

Income 60,000 60,000 80,000

Cost of revenue 10 12 12

5) On the basis of the three individual demand schedules below, and assuming these three people are the only ones in the society, determine (a) the market (a) the market demand schedule on the assumption that the good is a private good and (b) the collective demand schedule on the assumption that the good is a public good.

P	Qd(D1)	Qd(D2)	Qd(d3)
20	0	0	1
19	0	1	2
17	0	2	3
16	0	3	4
15	1	4	5
14	2	5	6
13	3	6	7
12	4	7	8
11	5	8	9
10	6	9	10

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ECON201 Lecture Notes - Lecture 4: Giffen Good, Externality, Economic Surplus

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