All else constant, an increase in the amount of borrowing by the federal government would reduce the amount of money available for businesses to borrow to finance investment spending

Economies of scale means that

A) the average fixed cost curve slopes downward over its entire range. B) the four-firm concentration ratio is below 80. C) the long-run average total cost curve slopes downward over it entire range. D) the long-run total cost curve slopes downward over it entire range.

Economics is concerned with: a. the choices people must make because resources are scarce

b. human decision makers and the factors that influence their choices. c. the allocation of limited resources to satisfy unlimited wants. d. all of the above.