Let MC be the marginal private cost per megawatt hour (Mwh) of producing electricity using coal. Let MSC be the marginal social cost per Mwh and T be the tax per Mwh. To achieve efficiency, the tax should be set so that

What would the Nash equilibrium be in this game?

a. Neither of the players would stop b. Both of the players would stop c. Player A stops d. Player B stops

The greater the number of different goods available in an economy, the:

a. less likely it is that a double coincidence of wants will exist, and the less likely it is that monetary exchange will develop. b. less likely it is that a double coincidence of wants will exist, and the more likely it is that monetary exchange will develop. c. more likely it is that a double coincidence of wants will exist, and the less likely it is that monetary exchange will develop. d. more likely it is that a double coincidence of wants will exist, and the more likely it is that monetary exchange will develop. e. more likely it is that individuals are producing only goods they want to consume.