Macroeconomic fiscal policy
The Market for Capital (the Loanable Funds Market) and the Crowding Out Effect. An increase in government deficit spending "crowds out" private investment by increasing interest rates and lowering the quantity of capital available to the private sector.
Government spending can be a useful economic policy tool for governments. Fiscal policy can be defined as the use of government spending and/or taxation as a mechanism to influence an economy. There are two types of fiscal policy: expansionary fiscal policy, and contractionary fiscal policy. Expansionary fiscal policy is an increase in government spending or a decrease in taxation, while contractionary fiscal policy is a decrease in government spending or an increase in taxes. Expansionary fiscal policy can be used by governments to stimulate the economy during a recession. For example, an increase in government spending directly increases demand for goods and services, which can help increase output and employment. On the other hand, contractionary fiscal policy can be used by governments to cool down the economy during an economic boom. A decrease in government spending can help keep inflation in check. During economic downturns, in the short run, government spending can be changed either via automatic stabilization or discretionary stabilization. Automatic stabilization is when existing policies automatically change government spending or taxes in response to economic changes, without the additional passage of laws. A primary example of an automatic stabilizer is unemployment insurance, which provides financial assistance to unemployed workers. Discretionary stabilization is when a government takes actions to change government spending or taxes in direct response to changes in the economy. For instance, a government may decide to increase government spending as a result of a recession. With discretionary stabilization, the government must pass a new law to make changes in government spending.
John Maynard Keynes was one of the first economists to advocate for government deficit spending as part of the fiscal policy response to an economic contraction. According to Keynesian economics, increased government spending raises aggregate demand and increases consumption, which leads to increased production and faster recovery from recessions. Classical economists, on the other hand, believe that increased government spending exacerbates an economic contraction by shifting resources from the private sector, which they consider productive, to the public sector, which they consider unproductive.
In economics, the potential "shifting" in resources from the private sector to the public sector as a result of an increase in government deficit spending is called crowding out. The figure to the right depicts the market for capital, otherwise known as the market for loanable funds. The downward sloping demand curve D1 represents demand for private capital by firms and investors, and the upward sloping supply curve S1 represents savings by private individuals. The initial equilibrium in this market is represented by point A, where the equilibrium quantity of capital is K1 and the equilibrium interest rate is R1. If the government increases deficit spending, it will borrow money from the private capital market and reduce the supply of savings to S2. The new equilibrium is at point B, where the interest rate has increased to R2 and the quantity of capital available to the private sector has decreased to K1. The government has essentially made borrowing more expensive and has taken away savings from the market, which "crowds out" some private investment. The crowding out of private investment could limit the economic growth from the initial increase government spending.