The government has both encouraged and discouraged the creation of monopolies

Which of the following is a similarity between a monopoly and an oligopoly with differentiated products?

A) There are no barriers to entry in both markets. B) The long-run equilibrium price in both markets exceeds marginal cost. C) There is a single seller in both markets. D) Firms in both the markets earn zero profit in the long run.

By dividing the value of total domestic output (real Gross Domestic Product (GDP)) by the number of workers, economists derive

A) the net domestic product. B) labor productivity. C) the size of the labor force. D) the rate of capital accumulation.