Final answer:
Economists have differing views on whether a central bank should focus solely on inflation or have more discretion. Central banks can influence macroeconomic outcomes by affecting aggregate demand through monetary policy.
Step-by-step explanation:
Economists have differing views on whether a central bank should focus solely on inflation or have more discretion. Inflation targeting philosophy proponents fear that politicians may pressure the central bank to adopt loose monetary policies even when the economy is already producing at potential GDP. Some central banks lack political power to resist such pressures, resulting in higher inflation without long-term reduction in unemployment. Despite challenges such as long lags, excess reserves, unstable velocity, and controversy over economic goals, central banks can influence macroeconomic outcomes by affecting aggregate demand through monetary policy.