A single-price monopoly can sell 1 unit for $9.00. To sell 2 units, the price must be $8.50 per unit. The marginal revenue from selling the second unit is

Which of the following is true if the production of a good gives rise to a positive externality?

A) The marginal social benefit from each level of output exceeds the consumers' willingness to pay. B) The marginal private benefit from production exceeds the marginal social benefit. C) The demand curve for the good shifts to the left in the presence of positive externalities. D) The demand curve for the good shifts to the right in the presence of positive externalities.

The percentage of a bank's total deposits held in reserves, either as cash in the vault or as deposits at the local Federal Reserve bank, is:

a) the reserve ratio. b) the reserve requirement. c) excess reserves. d) the money ratio.