The break-even investment line becomes flatter when the depreciation growth rate ________ or the labor force growth rate ________

The long-run average cost curve connects the lower part of the short-run cost curves because:

A) prices of inputs are less when acquired for a longer time period. B) in the long run, firms have more flexibility to change input combinations. C) specialization of inputs increases productivity only in the long run. D) the firms earn positive profits in the long run.

Which of the following is most critical for the maintenance of an efficient and productive economy?

a. Money backed by gold or silver b. Steadily rising prices c. An unlimited and unregulated supply of money d. A properly functioning monetary system e. A well-organized barter system