In choosing among alternative models, economists generally have the strongest
preference for models that
A) have assumptions that are close to exact replicas of reality.
B) are detailed and complex, with every available fact and figure included.
C) have few assumptions and are as simple as possible, even if they cannot predict very
well.
D) predict better than any other that is available.
E) have assumptions that are complicated.
Homer’s Holesome Donuts has determined that its profit-maximizing quantity is 10,000
donuts per year. Homer’s total revenue from the sale of donuts is $12,000 a year.
Homer’s costs are $16,000 in annual rental payments for its five-year lease on its store
and $5,000 for ingredients. Should Homer’s exit the market in the long run?
A) Yes, because Homer’s is incurring an economic loss.
B) Yes, because all costs are fixed in the long run.
C) No, because Homer’s is covering its variable costs.
D) No, because Homer’s is covering its fixed costs.
E) No, because all costs are variable in the long run.