ECON 208 Lecture Notes - Lecture 4: Ceteris Paribus, Inferior Good, Demand Curve

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Increased purchasing power, you can buy more normal goods. Substitution = buy more: purchasing power = buy less of this good (inferior good, with inferior goods, the forces work in opposite directions (substitution effect is often stronger and the demand for the inferior good will rise) Demand schedules and demand curves: demand schedule: Table with --> price per tonne / quantity demanded: demand curve: Allows you to visualize this relationship: relationship between a good"s own price and demand (ceteris paribus) --> change the price, but everything else stays the same, why, substitute effect and purchasing power. A change in variables other than price shift d curve: People will want to buy the product immediately, before the prise rise: other influences (ex change in the weather) Terminology: change in own price ??, moving along the middle line (d0) --> quantity demanded (result in the change of the price of the good itself, change in demand --> shifts the curve.

Related Questions

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

periwinklemuskrat632

Need help revising, and recommendation for a conclusion.

Throughout this paper is my understanding of what I have learned in class chapters 1-4, expressing my understanding and opinions. Economics is the study of how we deal with scarce resources. Microeconomics specially deals with business in the home country exclusively. This type of economics affects small businesses in the home country only. On the other hand, macroeconomics concerns our national welfare concerning trade and international business.

I believe that many things affect our economy on a microeconomics level. Things such as our understanding of our country in reflection to the world are very important. That is why we study ourselves before we study the macroeconomic principle of the world. Understanding ourselves is what microeconomics teaches us. Working from the inside out. The world is a place where there are differences in our wants and what we get. That is what makes items scarce. That is what positive economics is. Positive economics deals with what is and what we have. The other type of economics is called normative statements. This deals with what we should receive instead of what is and deserved to some extent. It's our scarce resources that determine our allocation of resources and how we use our resources and time. This is where opportunity costs come in, giving up something to do something. A successful business or country never ignores opportunity costs. We must ensure that we have a comparative advantage instead of the absolute advantage. Our resources must be used to achieve maximum output. Comparative is met when we have fewer opportunity costs to make some certain products than the other person or entity.

My initial understanding was scarcity was oil potentially running out, but we have so much of it that you can always find more with techniques such as fracking. Now it's obvious to me, one of our most scarce resources is time. You cannot avoid the 8,760 hours in a year. I understand that people have unlimited wants but limited resources. Everything has a cost and we must make a choice as we don't have unlimited farms, factories workers, etc. scarcity forces choices and this ties in with opportunity cost, for every gun made, a theft from the hungry is made. The opportunity cost not being used to feed the poor, but to make guns. And I find it easy to understand no one can have everything choices must be made on benefits. If I'm going to school, imp giving up making cash, as I'm giving up money for an education, I value education more. Scarcity is also related to the invisible hand. As it's an achievement that leads free markets and capitalism through competition for scarce resources.

My understanding of the invisible hand is a person neither intends to promote public interest and does not know how much he is promoting it. Only intending on his own gain. Without being his intention a person can be lead by the invisible hand to do good for society by pursuing one's own self-interest. Going into equity and efficiency the invisible hand does ensure both equity and efficiency. People work in their selfish ways to maximize profit while also contributing to the economy as a whole. It can also be argued that as the invisible hand wants to ensure efficiency, it cannot guarantee efficiency, because it can fail to produce an efficient allocation of resources, which in turn lead to a market failure. It can also be argued that it can't guarantee equity because not everyone gets a fair price. The way I like to remember efficiency is with a real-life example, like a reduction in the number of workers needed to produce a particular good for a particular amount. Equity refers to the ownership interest in an asset, for example, if a person owns a house with a market value of $800,000 and owes $100,000 on the mortgage leaving a $700,000 equity in the home.

It can be predicted that if the price of beef increases - ceteris paribus-the quantity of beef demanded by buys will decrease. In other words, if the price of beef increases, then the quantity of beef increases, then the quantity of beef demanded will decrease because all things have to be equal. In-class lecture thought me all other things remaining the same. Economists use ceteris paribus to determine the effect of a factor when all other factors have been held the same and helps simplify the study and get a more refined data set.

Economists deal with many issues that pertain to assuring that both a countries domestic output is efficient and that there is an effective trade balance. This means that there are a balance and limit on the amount of imports. Also, this means home production must be able to meet export demands. There are many factors that affect the production of goods and their effect on shifting the production possibilities frontier. This involves evaluating every detail including knowing the products and any close substitutes and compliments. It also involves knowing how an action or other external force will affect demand. This is called price elasticity; Substitutes are products that can replace any given product or service. An example of this would be Coke and Pepsi. The presence of substitutes affects price elasticity because if there are other options, then any change to the price or quality of the product will cause a shift of the demand curve. O course, price is a huge reason why the demand for a product decreases or increases yet it doesn't shift the curve because of the price only. This price change will cause a domino effect that will end with the shifting of the demand curve because it will cause an increase or decrease in demand of the substitute good if the price change is either lower or higher respectively. This price change serves as a catalyst that will change people's desire to spend more money on a more expensive product and that will instead choose to buy the substitute good for cheaper or buy more of the desired product. The change in the price of actual products will not shift the demand curve yet the change of the price of substitutes will because it serves to change people's purchasing behavior. On the other hand, compliments serve to boost demand when there is a decrease in price. The use of complementary goods is dependent upon another product. An example of this would be hot dogs and buns. If the price of hotdogs decreases then, conversely, the demand for hot dog buns will increase because of this change in price. In this scenario, the decrease in price will cause a positive shift in the demand curve because of people's desire and willingness to buy more buns. This is an example of a demand shifter. There are a few other demand shifters. The shifters of the demand curve are changes in expectations, disposable income, price of substitute goods and complements, tastes and preferences, and population size and composition. Changes in income affect the demand curve because if income is lower then people tend to save any extra income instead of wasting it. Disposable income is minimized and spending is lower. This also causes people to see a perceived value of things and distinguishing between what is necessary and what is a relative luxury. The lower the income, the higher the saving and avoidance to spend. An example of this would be if someone needs to buy some medication and it is relatively expensive, that doesn't mean that someone won't buy the medication just because it is expensive. It is necessary. Other factors that contribute to spending and demand are having a price ceiling and price floor. Having a price ceiling is a limit on the price of the product this is a government-imposed idea that is meant to protect consumers from unfair pricing and other conditions that may be malicious or obscure. This affects demand because if there is a price ceiling there is a limit on profit on a unit-to-unit basis. The other factor is the price floor. This price floor was created to encourage competition and affect consumers' willingness to pay because sometimes this new price may be higher than the original price. This causes a negative impact on a product that has a less than wanted perceived value. Many factors contribute to economic prosperity and certainly do help assure that information is analyzed and implemented into an economic and business plan.

limejellyfish231

1) For each of the following goods, state whether it is a normal good, a luxury, a necessity, or an inferior good. (Sugar)<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

a) Inferior. Increases in income lead to less use of sugar. However, rich people do not use much less sugar than poor people, so elasticity is positive but greater than 1.

b) Inferior. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive but less than 1.

c) Normal and necessity. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive and greater than 1.

d) Normal and necessity. Increases in income lead to slightly more use of sugar. However, rich people do not use much more sugar than poor people, so elasticity is positive but less than 1.

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2) A perfectly competitive firm sells its good for $24. If marginal cost is three times the quantity produced, how much does the firm produce? Why?

a) Assuming perfect competition, the firm is producing where MR = MC. If the price is $24, and MC is three times the quantity, it is producing 72 units.

b) Assuming perfect competition, the firm is producing where MC is twice MR. If the price is $24, then MC = $48. This means that the firm is producing 12 units.

c) Assuming perfect competition, we do not have enough information to determine how much the firm is producing.

d) Assuming perfect competition, the firm is producing where MR = MC=P. Since price is $24, MR also is $24. If MC is three times the quantity, it is producing 8 units

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3) State the law of supply.

a) Quantity supplied rises as price increases, other things constant. Quantity supplied falls as price decreases, other things constant.

b) Supply increases as price falls. Supply decreases as price rises.

c) Quantity supplied rises as price falls, other things constant. Quantity supplied falls as price increases, other things constant.

d) Supply increases as price increases. Supply decreases as price decreases

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4) If marginal cost is increasing, what do we know about average cost?

a) If marginal cost is increasing, average costs could be rising, falling, or constant. The direction of average costs depends upon whether marginal cost is higher or lower than average cost.

b) If marginal cost is increasing, average costs are rising. As the cost of the next item produced is rising, the average cost of all the items produced must also be rising.

c) If marginal cost is increasing, average costs are falling. Marginal costs only increase at very high levels of production. When items are mass-produced (because of economies of scale) their average costs always fall, even when marginal costs begin to increase.

d) Average cost is constant and always lower than marginal cost because of the law of decreasing marginal productivity. As more items are produced marginal costs increase (the same as productivity decreasing), but average costs remain constant because the total number of items produced is also increasing

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5) (The president of Lebanon Valley College proposed the following tuition program: provide a 50 percent tuition reduction for those graduating in the top 10 percent of their high school class, 33 percent reduction for those in the top 20 percent, and 25 percent reduction for those in the top 30 percent. All scholarship recipients were also required to maintain a minimum GPA. The comptroller estimated that the elasticity of demand for these students was greater than 1.)

Why did the program distinguish among top-performing students?

A) The program distinguished among top students because they were the least likely to respond to scholarships, keeping expenses related to scholarships down.

B) The program distinguished among top students because the top students demanded greater scholarships. The only way to achieve equilibrium was to supply more scholarships to these students.

C) The program distinguished among top students because their elasticities likely differed. The top 10 percent were likely being offered scholarships at other academic institutions, giving them greater choices, which made their elasticities greater.

D) The program distinguished among top students because their elasticities likely differed. The top 10 percent were likely being offered scholarships at other academic institutions, giving them greater choices, which made their elasticities lower.

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6) Say that equilibrium price fell and quantity remained constant. What would you say was the most likely cause?

a) The supply curve shifted left and the demand curve shifted left.

b) The supply curve shifted right and the demand curve shifted right.

c) The supply curve shifted right and the demand curve shifted left.

d) The supply curve shifted left and the demand curve shifted right.

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7) A firm has just decreased its price by 10 percent over last year's price, and it found that quantity sold decreased 20%. What The firm comes to you and wants to know its price elasticity of demand ?

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8) Name two advantages of the behavioral model.

Select all that apply.

a) They better match observed behavior.

b) Each model depends on a specific context and they are not easily generalized to other contexts.

c) Broader building blocks free researchers to look for more patterns in the data.

d) Irrational behavior results in complicated models that are often difficult to solve.

e) They assume people are rational, which better matches reality.

f) All economists agree the assumptions of the behavioral model are realistic.

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ECON 208 Lecture Notes - Lecture 4: Ceteris Paribus, Inferior Good, Demand Curve

ECON 208 Full Course Notes

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