ECON 1201 Lecture Notes - Lecture 7: Shortage, Excess Supply, Economic Equilibrium

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6 Mar 2018

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Econ 1201 lecture 7 supply and demand and supply mechanics. Impact of higher prices (short run: role of entry (long run) Big idea: not all suppliers have the same costs, low-cost and higher/high-cost producers, supply curve reflects the structure of costs across and within an industry. Structure of production costs: technological progress and innovations, changes in the overall structure of input prices, level of specialization/division of labor, expectations. Increase of decrease in the number of producers (long run: changes in opportunity costs (desired profits, taxes and subsidies, as we move along the supply curve, nothing is happening to the other factors. Increase or decrease in number of producers: changes in opportunity costs, taxes and subsidies. Remember: when you see supply, think production costs, when you see supply changing, think industry production costs changing. Increase in supply: decrease in supply, changes in the quantity supplied vs. changes in supply.

Related Questions

Who bears the primary costs of a rent control program?

landlords

renters that get rent-controlled apartments

taxpayers

the wealthy

Assume the demand for sushi is Qd = 180 - 3P, where Qd is quantity demanded and P = price in dollars. The supply of sushi is Qs = 80 + 5P, where Qs is quantity supplied (and P is, again, price in dollars). A price of $20 would result in:

	A.	Excess supply of 60
	B.	Excess supply of 120
	C.	Excess supply of 140
	D.	Excess demand of 140

US agricultural price supports are politically popular because

They have no adverse impacts

The US would have food shortages without them

The benefits accrue to a large number of voters and the costs are paid by a small number of voters

The costs are spread out among millions of people

	A.	$15.50
	B.	$12.50
	C.	$10
	D.	$15

Price floors and ceiling prices:

cause the supply and demand curves to shift until equilibrium is established.

both cause surpluses.

interfere with the rationing function of prices.

A change in the price of a good leads to a change in ________, which leads to a ___________

quantity supplied; shift of the supply curve

supply; shift of the supply curve

quantity supplied; movement along the supply curve

When the supply of a product increases, this implies that

the price of the product first declined

more will be purchased at the same price

producers will be willing to accept a lower price for each unit sold

demand for the good must have increased

producers will offer less for sale at each possible price

If there is a excess demand for product X:

fewer resources will be allocated to the production of this good.

the price of the product will rise.

the supply curve will shift to the left and the demand curve to the right, eliminating the shortage.

the price of the product will decline.

Which of the following will occur when there is a simultaneous decrease in demand and a decrease in supply?

B and D both necessarily occur

An increase in equilibrium quantity

A and C both necessarily occur

An increase in price

A and D both necessarily occur

A decrease in price

A decrease in equilibrium quantity

Velcro is becoming more and more popular for a variety of uses, including as fasteners for shoes. What should happen to the equilibrium price and quantity for shoelaces as a result?

Both price and quantity should decrease.

Price should increase and quantity decrease.

Both price and quantity should increase.

Price should decrease and quantity increase.

Nothing.

If the government imposes a ceiling price on apartment rents, we would expect to observe all of the following except one. Which is the exception?

	A.	conversion of some apartment complexes to condos
	B.	a shortage
	C.	an increase in the number of new apartment complexes being built
	D.	lower maintenance of existing apartments
	E.	long waiting lists for apartment seekers

supply; movement along the supply curve

both cause shortages.

chocolatebadger640

Considering the demand side of a market for a good, it is reasonable to expect that:
i. demand curves for a given good are identical between consumers
ii. demand curves for a given good differ between consumers
iii. an individual has identical demand curves for different goods
iv. an individual has different demand curves for different goods

iii

i and iii

ii and iv

Suppose the market demand curve for a good is represented by the linear equation Q = 60 - 0.75P. If the market price were to increase from P = $20 to P = $40, then holding all other factors constant:

the quantity demanded would decrease by 10 units and total expenditures on the good would decrease by $400

the quantity demanded would decrease by 15 units and total expenditures on the good would increase by $300

the quantity demanded would decrease by 30 units and total expenditures on the good would increase by $1200

the quantity demanded would increase by 20 units and total expenditures on the good would decrease by $800

the quantity demanded would increase by 10 units and total expenditures on the good would increase by $100

the quantity demanded would increase by 25 units and total expenditures on the good would increase by $1000

A perfectly competitive firms supply curve for a good identifies the:
i. minimum quantity supplied at each price, holding all other factors constant
ii. firms minimum willingness to accept for each incremental unit of the good (e.g., the first unit, second unit, etc.), holding all other factors constant
iii. maximum quantity supplied at each price, holding all other factors constant
iv. firms maximum willingness to accept for each incremental unit of the good (e.g., the first unit, second unit, etc.), holding all other factors constant

Considering the supply side of a market for a good, if a firms supply curve were vertical, then:

the law of supply holds, and quantity supplied is completely insensitive to changes in price

the law of supply holds, and quantity supplied is highly sensitive to changes in price

the law of supply fails to hold, and quantity supplied is completely insensitive to changes in price

the law of supply fails to hold, and quantity supplied is highly sensitive to changes in price

none of the above

The determinants of supply are:
i. factors other than price that will affect the quantity of a good or service a firm is willing and able to purchase
ii. factors that affect a producers maximum willingness-to-accept to produce various quantities of a good
iii. factors that affect a producers minimum willingness-to-accept to produce various quantities of a good

iii

i and ii

i and iii

The market supply curve for a good is derived by:
i. horizontally summing the supply curves of the individual firms in the market
ii. vertically summing the supply curves of the individual firms in the market
iii. summing the quantity supplied by each firm at a given price and then repeating this over the range of prices

iii

i and ii

i and iii

If the level of technology used in the production of a good improves, and assuming the quality of the good does not change, then:
i. more output may be obtained with a given amount of inputs compared to before the technological improvement
ii. a given amount of output may be obtained with fewer inputs compared to before the technological improvement
iii. the firm will increase its use of other inputs, such as the number of workers it employs
iv. market demand for the good will increase

Considering the market for gasoline, which of the following would result in an increase in market supply?
i. a decrease in the price of gasoline
ii. an improvement in oil extraction and refining technologies
iii. an increase in the wage rates paid to gasoline refinery workers
iv. a decrease in the price of crude oil, a key input used to produce gasoline
v. the imposition of a federal gasoline tax aimed a decreasing the emission of greenhouse gases

Suppose a market has two identical sellers. If each sellers supply function is given by P = 20 + Q, then the market supply function is:

From the market framework discussed in class and the readings, it may be concluded that in order for a good to be exchanged between a seller and a buyer, it must be that:

buyer maximum willingness-to-pay is greater than seller minimum willingness-to-accept

buyer maximum willingness-to-pay is greater than or equal to seller minimum willingness-to-accept

buyer minimum willingness-to-pay is greater than or equal to seller maximum willingness-to-accept

buyer minimum willingness-to-pay is greater than seller maximum willingness-to-accept

If the market demand function is given by P = 80 - 0.3Q and the market supply is given by P = 20 + 0.1Q, then the equilibrium price and quantity are:

Of concern are the affects of sustained summer droughts on the domestic supply of wheat. Noting that wheat is a primary ingredient in the production of bread and that potatoes are a substitute for bread, if the supply of wheat declines then it is reasonable to expect:

the price of wheat to fall, the supply of bread to increase, and the demand for potatoes to increase

the price of wheat to fall, the supply of bread to increase, and the demand for potatoes to decrease

the price of wheat to rise, the supply of bread to decrease, and the demand for potatoes to decrease

the price of wheat to rise, the supply of bread to decrease, and the demand for potatoes to increase

the price of wheat to rise, the supply of bread to increase, and the demand for potatoes to increase

the price of wheat to rise, the supply of bread to increase, and the demand for potatoes to decrease

Suppose a perfectly competitive market is initially in equilibrium. If market demand and supply decrease simultaneously, then equilibrium:

price will rise, but the equilibrium quantity may either rise, fall, or remain unchanged

quantity will rise, but the equilibrium price may either rise, fall, or remain unchanged

price will fall, but the equilibrium quantity may either rise, fall, or remain unchanged

quantity will fall, but the equilibrium price may either rise, fall, or remain unchanged

Considering the demand side of a market for a good, the consumer surplus derived by an individual:
i. is the difference between the maximum amount the consumer is willing to pay on each unit and the minimum prices that producers are willing to accept
ii. is the difference between the minimum amount the consumer is willing to pay on each unit and the price he/she
actually pays
iii. is the difference between the maximum amount the consumer is willing to pay on each unit and the price he/she actually pays
iv. will decrease if price increases

Suppose the market demand for a good is described by the equation P = 120 - 2Q. If a change in market supply results in price decreasing from P0 = $80 to P1 = $70, then the resulting change in consumer surplus is:

DEMAND and SUPPLY FUNDAMENTALS: Shifts in Demand or Supply

Variables typically included in a multivariate demand function (other than the price and quantity of the item the demand function represents) are consumer tastes and preferences, the number of buyers, spendable (disposable) income, prices of substitute goods, prices of complementary goods, advertising expenditures, weather, and expectations. Recalling that the price of the item being considered is placed on the vertical axis, and the quantity on the horizontal axis, the other variables are termed demand shifters. Please answer the following questions about the affect changes in other variables might have on the demand for the item. These changes will either cause demand to increase(shift right) or decrease(shift left). Use either word as applicable, for the short answer.

If the price of a good increases because the demand for it increases, What would you expect the demand for its complement to do?

If the demand for coffee beans increases, then what is likely to happen to the demand for land on which to grow coffee?

If advertising expenditures for the good being considered are decreased, then demand for the good being considered will likely:

Lattes are a relatively expensive coffee drink. However, being a normal good, as consumersâ disposable income increases, the demand for Lattes should:

5. As the supply of tablet computers and e-readers increases relative to the demand for them, what change in demand for printed textbooks (having digital e-book versions) would you expect?

Variables typically included in a multivariate supply function (other than the price and quantity of the item the supply function represents) are prices of other goods that use similar input resources for production, expectations, the number of suppliers, techniques of production, taxes and subsidies, and prices of input resources, weather. Please answer the following questions about the affect changes in other variables might have on thesupplyof the item. These changes will either cause supply to increase(shift right) or decrease(shift left). Use either word as applicable, for the short answer.

If there is an increase in the number of producers of the item being considered, then the supply of it is likely to:

A tariff is a form of trade restriction (that behaves much like a tax). Suppose the United States removes a high tariff on imported broccoli that had been in effect for a long time. How should this affect the supply of imported broccoli?

A decrease in a government-provided subsidy of the item being considered is likely to ___________its supply.

If the price of an input resource decreases (and there are no cheaper substitutes for the resource) then producers of the item are likely to _____________ its supply?

Suppose broccoli growers have successfully lobbied Congress for a crop subsidy. Once the subsidy becomes available, the domestic broccoli supply is likely to:

ECON 1201 Lecture Notes - Lecture 7: Shortage, Excess Supply, Economic Equilibrium

ECON 1201 Full Course Notes

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