Demand side
Demand side economics is a way to reduce the gap between the peak of inflation and the lowest point of the rescission. Basically it balances out the business cycle. it does this through monetary and fiscal policies. Monetary policy is when you manipulate the money supply and interest rate depending on where you are in the business cycle. If you are on your way up or infighting you would decrease money supply and increase interest rates to take money out of the economy. If your in the fall of a rescission you would do the opposite and put the money back into the economy. Fiscal policies do the same thing but manipulate different things. While inflating you increase taxes and decrease spending, and the opposite for when going into a rescission. The only reason demand-side economics works is because of government intervention and control.