The first conventional method of monetary policy is open market operations. This means that Central Bank can affect the money supply by purchasing and selling bonds. When the Central Bank buys bonds, it puts money to the circulation. On the contrary when the Central Bank sells bonds, it takes money away. If the money supply becomes more this means that in equilibrium the LM curve will shift to the right which leads to a lower interest rate. If the interest rate is lower, then people are more willing to spend than to save, which in terms increase consumption, hence output will increase.
The other conventional monetary policy is reserve requirements. When the Central Bank increases bank reserve ratio, the banking sector's excess reserves are decreased. This brings to a decrease to the supply of money. Consistently, a reduction in reserve requirements stimulates a rise in the supply of money. The more money in use, the higher is the production. It prevents banks from lending as much money as