The slope of a demand curve is almost always
a. positive, because when people buy more of a good the cost of producing it will rise.
b. positive, because the more money a person has, the more of a particular good will be
bought.
c. negative, because when people buy more of a good the cost of producing it will fall.
d. negative, because with everything else equal, the same people will buy more of a
good when its price is lower.
e. positive, because as the price rises, people want to sell more of the good.
A large factory pours its toxic wastewater into a nearby river, and as a result, the
residents of a downstream community experience high rates of illness and birth defects.
The economic problem illustrated by this example is
a. marginal thinking.
b. comparative advantage.
c. repealing the laws of supply and demand.
d. externalities.
e. productivity growth.