Crowding Out

Definition of crowding out – when government spending fails to increase overall aggregate demand because higher government spending causes an equivalent fall in private sector spending and investment.

Question: Why does an increase in public sector spending by the government decrease the amount the private sector can spend?

If government spending increases, it can finance this higher spending by:

  1. Increasing tax
  2. Increasing borrowing

Impact of higher government spending on aggregate demand

  1. Increasing tax. If the government increases tax on the private sector, e.g. higher income tax, higher corporation tax, then this will reduce the discretionary income of consumers and firms. Ceteris paribus, increasing tax on consumers will lead to lower consumer spending. Therefore, higher government spending financed by higher tax should not increase overall AD because the rise in G (government spending) is offset by a fall in C (consumer spending).
  2. Increasing borrowing. If the government increases borrowing. It borrows from the private sector. To finance borrowing, the government sell bonds to the private sector. This could be private individuals, pension funds or investment trusts. If the private sector buy these government securities they will not be able to use this money to fund private sector investment. Therefore, government borrowing crowds out private sector investment.

Financial crowding out

This is the term used to describe how government borrowing can cause higher interest rates. If government needs to sell more securities, it may have to increase interest rates on its bonds to attract people to buy. For example, in the EU, bond yields rose in 2011 because markets were worried about levels of EU debt. Therefore, the increased government borrowing was at the expense of higher interest rates on government debt. These higher interest rates on bonds lead to higher interest rates elsewhere in the economy and are likely to discourage private sector investment and spending.

  • However, in a recession, the government can often borrow more without interest rates rising. For example, in the UK 2009-13, bond yields fell because people wanted to save money in bonds rather than invest. Also Keynes argued that in a recession, the private sector has idle resources. Therefore, government borrowing is effectively making use of these idle resources. Financial crowding out is more likely to occur when the economy is growing and is close to full capacity already. When the economy is growing strongly, the government will have more competition from other private sector investments, therefore government bonds yields will have to rise to attract savings from other investment projects.

Resource crowding out

The second type of crowding out is simply the fact that if the private sector lend money to the government they have less money to invest in private sector projects.

Furthermore, it is argued that the private sector investment tends to be more efficient than the public sector investment. Therefore, the economy is worse off for government borrowing.


Crowding out doesn’t always occur

It is important to bear in mind crowding out doesn’t always occur – it depends on the state of the economy.

Keynesians again argue that in a recession and liquidity trap, there is no crowding out because the government is merely spending unused resources. Keynesians argue that in a liquidity trap the LM curve is elastic. This means increased government spending doesn’t increase interest rates.

Another way of thinking about a recession is that the rise in government borrowing is merely to offset the rise in private sector saving.


This graph shows that in 2008-2012, there is a sharp rise in private sector saving. This is matched by an equivalent rise in government borrowing.


4 thoughts on “Crowding Out

  1. Crowding out is caused by the fact of the government – central bank machine borrowing in order to spend. Since no one seems to have the faintest idea how serious a problem crowding out is, there is a phenomenally simple solution to this “problem”: DONT BORROW !

    In other words, since the the government – central bank machine can simply print money, why not just “print and spend” instead of “borrow and spend”. Problem solved !

    Indeed, this is more or less what the UK authorities did in 2009. Trouble was that they handed too much of the money to the UK equivalent of Wall Street rather than the UK equivalent of Main Street.

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