The second largest source of income for the federal budget is:

Briefly describe the concept of the "invisible hand."

What will be an ideal response?

In the ultimatum game, one reason players don't choose the rational offer is

A) that there are too many possible outcomes to reasonably consider. B) they are worse off by taking the offer. C) they prefer to sacrifice to punish "unfair" behavior. D) that it is not a Nash equilibrium.