In the antebellum period, the largest source of employment was:

The prisoner's dilemma game can be used to describe

A. the game Rock Paper Scissors B. why candidates in elections go negative. C. how individuals acting in their self-interest leads to the best outcome overall. D. a zero sum game.

If the government runs an ad campaign to shame litterers, they are:

A. trying to get individuals to internalize the negative externality created by their decision to litter. B. using protectionist policy to help the trash-collecting industry. C. wasting a lot of money. D. All of these statements are true.