c. 500 units is not an efficient quantity of good x.
d. All of the above are correct.
Consider the market for portable air conditioners in equilibrium. A summer of
unseasonably cool weather would cause
a. both the equilibrium price and quantity to decrease.
b. both the equilibrium price and quantity to increase.
c. the equilibrium price to increase and the equilibrium quantity to decrease.
d. the equilibrium price to decrease and the equilibrium quantity to increase.
Which of the following statements about economic models is correct?
a. Economic models are built to mirror reality exactly.
b. Economic models are useful, but they should not be used for the purpose of
improving public policies.
c. Because economic models omit many details, they allow us to see what is truly
important.
d. Economic models seldom incorporate equations or diagrams.
In a perfectly competitive market, at the market price, buyers
a. cannot buy all they want, and sellers cannot sell all they want.
b. cannot buy all they want, but sellers can sell all they want.
c. can buy all they want, but sellers cannot sell all they want.
d. can buy all they want, and sellers can sell all they want.