When there are significant barriers to entry and there are few firms in the industry, we label this

Game theory is necessary to understand which kinds of markets? (i) perfectly competitive (ii) monopolistically competitive (iii) oligopoly (iv) duopoly (v) monopoly

a. (i) and (ii) only b. (iii), (iv), and (v) only c. (iii) and (iv) only d. (i), (ii), (iii), (iv), and (v)

The costs of pollution are subtracted from the value of final sales before calculating GDP.

Answer the following statement true (T) or false (F)