Upward shifts are
a. increases in both demand and supply

When people make rational choices, they

A) do not consider their emotions. B) weigh the costs and benefits of their options and act to satisfy their wants. C) are necessarily making the best decision. D) necessarily make a decision in the social interest. E) behave selfishly.

In a country with a mixed market economy, what actions may government prevent?

a. open competition among car manufacturers b. the addition of dangerous narcotics in children's cough syrup c. a reduction in fuel prices d. the bankruptcy of a small business