Monetary and Fiscal Policy in the Short Run
Why are policies implemented
Close output gaps
If in a recessionary gap, lower unemployment
if in inflationary gap, lower inflation
These policies are implemented through fiscal policy (manipulating AD by changing spending and taxes) and monetary policy (manipulating AD by changing interest rates)
A combination of fiscal and monetary policies can influence AD, real output, price level, and interest rates

Contractionary monetary policy decreases price level by raising interest rates, which discourages borrowing and reduces consumer spending. This helps to decrease aggregate demand, thus alleviating inflationary pressures in the economy.