HW3: Homework - Ch.3: Supply and Demand
The table contains information on the price per month and the monthly demand and supply of online music streaming subscriptions. Price Quantity demanded (thousands) Quantity supplied (thousands) $10.60 510 360 $10.80 450 380 $11.00 410 410 $11.20 360 480 What are the equilibrium price and quantity? Equilibrium price: $ _________________. Equilibrium quantity: ___________________ thousand subscriptions.
$11.00 410
Suppose the accompanying graph depicts a market for one pound bags of candy. Place the line labeled Excess Demand at a price that would generate an excess demand (shortage). Then, determine the size of the excess demand. Excess Demand = __________ million bags
Excess demands moves to to the bottom on the Y access and stops at a horizontal continues. 4
The accompanying graph represents a hypothetical market for luxury automobiles. Suppose that a major luxury car producer exits the market in order to produce more economy cars. At the same time, a market research group reports that the average price of a luxury car is increasing and the number of luxury cars sold is increasing. Manipulate the graph to demonstrate what must be happening to supply and demand.
Line D moves to the farthest to the right at the very end, Line S moves one over to the left.
The demand curve
is a graphical representation of the relationship between price and quantity demanded.
Suppose the cost of lithium-ion batteries, an input into the production of electric vehicles, has dropped more steeply than expected. The accompanying graph depicts a market for electric vehicles. Demonstrate the effect of a reduction in the price of lithium-ion batteries by adjusting the accompanying diagram. Equilibrium price Equilibrium quantity
line D stays the same, Line S move outward to the right. decreases. increases.
The accompanying graph contains individual supply curves for the only two firms in a hypothetical market for stuffed animals. Place the market supply curve at the correct location on the graph. What happens to the market if a third supplier enters the market, holding all else constant?
(5,000 , 1) (9000, 8) Market supply increases.
The demand schedule for chicken feet, a dim sum delicacy served at some Chinese restaurants, is shown in the table. Although some people find the texture strange, others have developed a taste for it. Price of chicken feet (per pound) Quantity of chicken feet demanded (millions of pounds) in 2008 Quantity of chicken feet demanded (millions of pounds) in 2018 $ 3.00 3.0 9.2 $ 2.50 3.2 9.9 $ 1.25 3.6 10.3 $ 1.00 4.1 12.2 $ 0.50 5.7 15.0 How many more chicken feet were demanded in 2018 , at a price of $1.25 a pound, than in 2008 ? __________________ million pounds Based on the demand schedule, you conclude
6.7 million lbs The demand curve shifted to the right
During the Obama administration, the development of low-cost batteries for electric cars received large amounts of federal funding in terms of subsidies. Meanwhile, American households gave a higher priority towards minimizing their environmental impact. Consider the market for zero-emissions electric vehicles where there is an upward-sloping supply curve and a downward-sloping demand curve. Which direction will demand and supply shift? What will happen to the equilibrium price? What will happen to the equilibrium quantity?
Both curves will shift right. Change is ambiguous. Quantity increases.
Categorize each scenario as describing a movement along a demand curve or a shift of the demand curve. Shift of the demand curve: Movement along the demand curve:
College students purchase man more energy drinks during finals week than during the rest of the semester students eat out more often as the federal government increases how much grant money it provides students. ________________________________________________________________ College students reduce how much detergent they use for each load of laundry in response to higher detergent prices. College student rush and buy discount furniture to take advantage of a one-day sale.
Stone and brick are substitutes in home construction. Consider the market for bricks depicted below. Suppose the price of stone increases due to new regulations for the stone quarrying industry. Illustrate the impact this will have on the market for bricks. Equilibrium price Equilibrium quantity
Curve line S stays the same, Curve line D increase and moves outward on the graph. increases. increases.
The accompanying graph depicts a hypothetical market for analog TVs. In June 2009, the U.S. Federal Communications Commission (FCC) mandated that all over-the-air television broadcasts originating in the U.S. must be broadcast digitally instead of the traditional analog signal. These digital transmissions cannot be decoded by traditional analog TVs but require either a digital decoder be attached to an analog TV or a natively digital TV. Both sellers and consumers were made aware of the upcoming switch from analog transmission to digital several years before the mandate took effect. Demonstrate on the graph how the market for analog TVs changed immediately following the announcement of the switch to digital. For the supply side, focus on the end seller (such as an electronic store) of a TV and not the manufacturer.
Line D moves to the left one and line S moves to the right.
Suppose that there has been a sudden influx of refugees in the small town of Dallon, leading to a doubling of the local population. The accompanying graph depicts Dallon's market for food. Adjust the graph to show the immediate impact that this rise in population has on the food market. Then determine what happens to equilibrium price and quantity. Equilibrium price Equilibrium quantity
Line D shifts outward increases increases.
The U.S. government has subsidized ethanol production since 1978. With the advent of affordable electric cars, policymakers are considering whether to allow the subsidy to expire. The accompanying graph represents the market for ethanol. Move the supply and/or demand curves to show how reducing the subsidy will affect the ethanol market. Equilibrium price Equilibrium quantity
Line S moves left inward line D stays the same. increases. decreases.
The accompanying supply and demand graph represents a hypothetical market for spaghetti pasta. Demonstrate how an increase in the price of penne, a different type of pasta, and a decrease in the price of meatballs will affect the supply and demand of spaghetti pasta. Assume that producers of spaghetti pasta do not also produce penne.
Line S stays the same, Line D moves to the right increasing in price.
The accompanying graph represents the supply of printer ink cartridges. The current price of ink (per cartridge) is $20 and indicated by the point on the supply curve. Suppose the price of cartridges increases to $24. Illustrate on the graph how the market for Ink Cartridges changes.
Line S stays the same, point moves to (7, 24)
The table contains information on the price per month and the monthly demand and supply of online music streaming subscriptions. Price Quantity demanded (thousands) Quantity supplied (thousands) $ 10.60 280 210 $ 10.80 240 240 $ 11.00 190 310 $ 11.20 110 440 What is the quantity demanded at $ 11.00 ? What is the quantity supplied at $ 11.00 ? At what price is the quantity supplied equal to 210,000 ?
Quantity demanded is 190 thousand subscriptions Quantity supplied is 310 thousand subscriptions $10.60
Classify each scenario according to whether the change in quantity is caused by a shift in the supply curve or movement along the supply curve. Shift of the supply curve Movement along the supply curve
Shift of the supply curve: Amplitude decides to join the smartphone market. After discovering that flash-steaming tuna before using mechanical processes to extract meat removes more tuna flesh, more cans of tuna arrive on the shelves at all major grocers. Movement along the supply curve: Rising wages for construction workers in Toronto result in construction worker moving to Toronto. A national consumer product company produces less of it premium quality soap as a result of lower soap prices. American sell their gold and silver jewelry as a result of rising prices.
The accompanying table contains the individual demand schedules of dark chocolate for Vanessa and Angela. Assuming they are the only people in the market for dark chocolate, place each of their individual demand curves and the market demand curve at the correct locations on the accompanying graph. Price of dark chocolate (per pound) Pounds of dark chocolate demanded by Vanessa Pounds of dark chocolate demanded by Angela $8 1 3 $1 3 5 After a while, Angela gets sick of eating the bitter chocolate and decides to cut back on dark chocolate and enjoy white chocolate more. What happens as a result of Angela's decision? Select all of the correct answers.
Vanessa (1, 8) ( 3, 8) Angela (3, 8) (5, 1) Market (4, 8) (8, 1) Angela's individual demand for dark chocolate decreases. The market demand for dark chocolate will decrease. Angela's individual demand for white chocolate increases.
According to the law of demand,
a decrease in price increases quantity demanded.
For each example listed, decide if the good is a normal good or an inferior good. Make sure you answer from the perspective of the individual or individuals doing the buying or consuming. Billy's mom increases his weekly allowance by $ 5 . As a result, Billy increases the number of apps he downloads on his smartphone. Smartphone apps are Susan gets a 15 percent performance bonus at work. She can finally stop eating so many frozen pizzas and eat something more tasty. Frozen pizzas are Mike is an appliance salesman. Refrigerator sales in his store have fallen and so has his commission. Mike decides to switch from name brand cereal to generic cereal. Generic cereal is Hair stylist Molly loses a few of her clients. Molly cuts back on the number of smoothies she buys during the week. Smoothies are
a normal good an inferior good an inferior good a normal good
The figure shows the supply and demand for online music. Suppose that an economic downturn decreases household wealth and erodes consumer confidence. Move the supply and/or demand curves to reflect the primary effect this would have on the market for online music. You can assume that online music is a normal good. Also select the end result of equilibrium price and quantity. Equilibrium Price: Equilibrium quantity:
demands curve shift inward, supply curve stays the same. decreases decreases
Andrew, a college student, loves drinking coffee late at night to study for exams. Having no income, he is used to buying cheap, bad-tasting coffee, such as Beanlightened, that he needs to grind and brew himself. The coffee tastes putrid but, with enough cream and sugar, Andrew is able to tolerate it. Occasionally, he does go out to Starbucks when he has spare money. After graduation, Andrew gets a job working at a database firm as a programmer. His income is now a healthy $75,000 a year, and he decides he has had enough bad-tasting coffee. He ends up buying coffee daily from Starbucks, even though it costs significantly more than Beanlightened. In economic terms, Starbucks coffee is for Andrew a(n) Beanlightened coffee is for Andrew a(n) Andrew's demand for Starbucks coffee changed as a result of
normal good. inferior good. a change in income.
