To serve the public interest, government sometimes promotes competition by breaking up natural monopolies

On a national level, the concentration ratio for grocery stores is very low. But, the "true" market for grocery stores is local in nature. What limitation does the geographic market put on the measure of concentration for grocery stores?

A) On the local level, grocery stores are more concentrated than they appear on the national level. B) On the local level, grocery stores are not as concentrated as they appear on the national level. C) The level of concentration is overestimated when viewing the national level. D) Both answers A and C are correct.

Which of the following is an asset of a bank and a liability for its customers?

a. deposits of its customers and loans to its customers b. deposits of its customers but not loans to its customers c. loans to its customers but not the deposits of its customers d. neither the deposits of its customers nor the loans to its customers