Monetary policy and fiscal policy can be categorized into two types of contraction policy are pulls money out of the economy, such as the Government's tax collection rather than bringing cash or so-called budget out of balance, or the Central Bank pulled money out of the economy, will be used during the inflation occurred. Another is that a policy of expansion was to add money to the economy, such as Government. Spend more money, which is also known as the budget deficit and the Central Bank. Put money into the economy by various methods are often used when deflation occurred.