Aggregation is important because it allows macroeconomists to divide a whole into its individual components

Everything else held constant, an increase in the required reserve ratio on checkable deposits causes the M1 money multiplier to ________ and the money supply to ________

A) decrease; increase B) increase; increase C) decrease; decrease D) increase; decrease

Smith Barney, Charles Schwab, and Merrill Lynch are all primarily:

A. investment banks. B. mutual fund companies. C. insurance companies. D. securities firms.