Refer to the graph shown, which shows the demand and supply for a new vaccine against the common cold. Once vaccinated, a person cannot catch a cold or give a cold to someone else. The socially efficient level of output is:

The economic way of thinking assumes individuals

A) are irrational. B) are only concerned with "number one" (i.e., themselves). C) try to advance their own projects. D) cannot possibly behave in the interests of others.

If Healthy Nuts contractually requires distributors who purchase Healthy Nuts' snack packs to also purchase Healthy Nuts' large -sized mixed nuts tins, this is an example of ________.

A) a requirements contract B) a tying arrangement C) territorial confinement D) exclusive de