1.  a representation of how each combination of choices affects the profits of each firm
is known as a

C. payoff matrix.

2.  If a firm is better off with a particular strategy regardless of what the other firm does, then the strategy is the firm?s

B. dominant strategy.

3.  The prisoner?s dilemma illustrates a situation in which

D. each player pursuing its self interest generates a collective outcome that is inferior for both.

4.  When a good is nonrival in consumption it means that

C. it can be consumed by more than one person at a time.

5.  The free rider problem

C. is made worse by large numbers of consumers.

6.  External benefits tend to cause

A. under production of the good by private firms.