Final answer:
In response to a negative output gap caused by a decrease in government spending, the central bank is likely to implement a contractionary monetary policy by increasing the policy rate to reduce inflationary pressures.
Step-by-step explanation:
In the scenario described, government spending has decreased, causing the output gap to become negative. In response, the central bank is likely to implement a contractionary monetary policy to stabilize inflation.
This means the central bank would increase the policy rate to reduce inflationary pressures. By increasing interest rates, the central bank aims to discourage borrowing for investment and consumption spending, which helps to reduce demand and stabilize inflation.