Sven likes to water ski, but can only water ski during the one week each year when he
is on vacation. Therefore, he plans to ski every day, for eight hours a day. The first day,
Sven skied for eight hours and enjoyed every hour. The second day, Sven slept in and
then skied for seven hours, which was fun but not as much fun as the first day. The third
day, Sven skied for six hours, but was starting to get a bit bored by the end. The fourth
day, Sven skied for four hours and then took a nap. On the fifth day of Sven’s vacation,
Sven went blueberry picking all day. Sven’s vacation convinced him that:
A. even for activities he really enjoys, diminishing marginal utility eventually sets in.
B. blueberry picking yields higher total utility than does water skiing.
C. even for activities he really enjoys, total utility declines over time.
D. economic theory applies to things you buy, but not to recreational activities.
The figure below depicts the short-run market equilibrium in a perfectly competitive
market and the cost curves for a representative firm in that market. Assume that all
firms in this market have identical cost curves.
Given that the current equilibrium price is $8, what will happen to the number of firms
in this market in the long run?
A. The number of firms in the market will not change unless there is a change in either
demand or in the cost of production.
B. The number of firms in the market will fall as firms exit the market in response to
negative economic profit.
C. It is impossible to determine whether the number of firms in this market will rise or
fall.
D. The number of firms in the market will rise as firms enter the market in response to
positive economic profit.