intrusion of variable z.
b.allow one to focus upon micro variables by ignoring macro variables.
c.allow one to focus upon macro variables by ignoring micro variables.
d.determine whether x causes y or vice versa.
15) Imports have the same effect on the current size of GDP as:
A.exports.
B.investment.
C.consumption.
D.saving.
16) To say money is socially defined means that:
A.money has been defined in a Constitutional amendment.
B.whatever performs the functions of money extremely well is considered to be money.
C.the money supply includes all public and private securities purchased by society.
D.society, acting through Congress, specifies what shall be included in the money
supply.
17) when the economist says that economic wants are insatiable, this means that:
a.economic resources are valuable only because they can be used to produce consumer
goods.
b.economic resources-land, labor, capital, and entrepreneurial ability-are scarce.
c.these wants are virtually unlimited and therefore incapable of complete satisfaction.
d.the structure of consumer demand varies from time to time and from country to
country.
18) The idea of efficiency wages is that:
A.the wages of each type of labor must be proportionate to their marginal products.
B.the wages of each type of labor must be equal to their marginal products.
C.firms might get greater work effort by paying above-equilibrium wage rates.
D.workers are more diligent when paid below-equilibrium wages.