Which of the following statements about demand is true?
a. The demand curve for a group of consumers in a market is simply the horizontal
summation of each individual’s demand.
b. The single demand curve shows the quantity of a good that people will buy, allowing
all factors (price, income, expected future prices, etc.) to vary.
c. An increase in income will cause a person to move down and to the right along her
demand curve.
d. All of the above are true.
An effective minimum wage
a. imposes a price ceiling on the wages of various categories of low-skill workers.
b. increases the demand for low-skill workers.
c. makes it easier for low skill workers to find jobs.
d. increases the earnings of some low-skill workers while reducing the employment and
training opportunities available to others.
Which of the following would be most likely to improve the standard of living of a
less-developed country?