Question

1. which of these are reasons why monetary policy is difficult to \fine - tune\?variable velocity of moneyfixed interest rateslong, unpredictable time lagsbanks hold excess reserves

Explanation:

• Variable velocity of money: The velocity of money (how fast money changes hands) is not constant. If it's variable, the relationship between the money supply (a key element in monetary policy) and economic outcomes (like inflation or GDP) becomes less predictable. For example, if the central bank increases the money supply assuming a certain velocity, but velocity changes, the impact on the economy won't be as expected.
• Long, unpredictable time lags: Monetary policy actions (like changing interest rates) don't affect the economy immediately. There are lags in recognition (realizing the economy needs a policy change), decision - making (deciding on the right policy tool), and implementation (the time it takes for the policy to impact the economy). These lags are unpredictable. By the time the policy takes effect, the economic situation might have changed.
• Banks hold excess reserves: When central banks implement monetary policy (e.g., through open - market operations to influence the money supply), if banks choose to hold excess reserves instead of lending out the money as the central bank expects (based on the money multiplier model), the expansion or contraction of the money supply won't be as intended.

Fixed interest rates are not a reason. In fact, monetary policy often works by changing interest rates (e.g., in a flexible - rate system) to influence borrowing, spending, and investment. If rates were fixed, monetary policy would be even more limited in its ability to fine - tune (but in reality, in most modern economies with active monetary policy, interest rates are not fixed in the relevant sense for policy implementation).

Answer:

Variable velocity of money, Long, unpredictable time lags, Banks hold excess reserves.