The output gap is defined as ‘the difference between actual and potential output.’ When actual output exceeds potential output, the gap is positive. When actual output is less than potential output, the gap is negative. The size of the output gap traces the course of the business cycle. In the current recession, the output gap is negative in all major economies. The worry in recent months has been that a persistent large negative gap could lead to a downward deflationary spiral. Evidence is emerging, however, that the recession may be bottoming out and the danger of deflation easing. But just how big is the current negative output gap? As the article below from The Economist states, “Estimating how big the output gap is, and how much of a deflationary threat it still poses, is not easy.”
So how is the output gap measured in practice? How do we measure ‘potential output’? The two articles consider this issue of measurement and the relationship between the output gap and the rate of inflation. The last two links are to data sources giving estimates of the output gap. The first is from the European Commission and the second is from the OECD. As you will see, there are differences in their estimates.
Put out: Uncertainty over the size of the output gap complicates the task of central banks The Economist (2/7/09)
How big is the output gap? FRBSF Economic Letter (12/6/09)
See also:
Box 1.3.2 on page 31 and Table 13 on page 140 of European Economy: Economic Forecast, Spring 2009 European Commission, Economic and Financial Affairs (From the above link, click on the little ‘en’ symbol.)
and: Table 10 from OECD Economic Outlook No. 85, June 2009 OECD (From the above link, click on ‘Demand and output’. The first 10 tables then download as an Excel file.)
Questions
- Why is it difficult to measure potential output? (See both The Economist article and Box 1.3.2 from the European Economy: Economic Forecast, Spring 2009.)
- What is meant by the ‘NAIRU’? Why may it have risen during the recession? How would you set about estimating the value of the NAIRU?
- How might you infer the size of the output gap from the behaviour of inflation?
- Plot the output gap for two countries of your choice using data from both the European Economy and the OECD Economic Outlook for the years 2004 to 2010. Discuss the differences between (a) the two plots for each country and (b) the two countries.
On 7 April, Brian Lenihan, Ireland’s Finance Minister, introduced an emergency Budget. He forecast that Irish real GDP would decline by some 8 per cent in 2009, that consumer prices would fall by 4 per cent (i.e. substantial negative inflation) and that unemployment, already at 11 per cent, would rise further. So what was his solution? Was it a massive fiscal stimulus to boost aggregate demand and turn the economy around? No: it was precisely the opposite. He announced substantial tax increases and cuts in government expenditure? Was this economic madness, or was there economic sense in the measures? The following articles explore the arguments.
Ireland’s shock therapy has got its merits Independent (9/4/09)
Ireland Faces ‘Challenge of Its Life’ BusinessWeek (8/4/09)
Few crumbs of comfort as incomes take severe hammering Irishtimes.com (10/4/09)
Republic’s Budget cuts ‘for the common good’ Belfast Telegraph (8/4/09)
Ireland unveils budget ‘challenge’ Financial Times (8/4/09)
Ireland unveils emergency budget BBC News (7/4/09)
When fiscal stimulus isn’t stimulating: Stephanie Flanders blog BBC News (7/4/09)
Ireland imposes emergency cuts Telegraph (8/4/09)
Questions
- Consider the arguments for and against the fiscal tightening measures adopted by the Irish government.
- Should the UK government also adopt a tighter fiscal stance?
- How important is investor confidence in determining the success of a Budget?
While deflation was quite common right up to World War II, it has not been seen in the UK since 1947. The podcast considers whether it might return and looks at the impact of deflation on economic activity. There is a short case study on the deflationary years suffered by Japan between 1997 and 2006 and a consideration of policies that might be appropriate to overcome defaltionary pressures.
Economists never like to use simple words when there are more complex ones available! So, the new term for printing money is ‘quantitative easing’. This refers to deliberate increases in the money supply aimed at preventing deflation. The real concern is whether quantitative easing will stoke up inflationary pressures for the future – the balance between inflation and deflation is a fine line to tread. Quantitative easing becomes necessary when there is danger of deflation and interest rates have already been cut as far as is possible.
Another problem, in the short term, is that an increase in the monetary base may have little effect on broader money (M4 in the UK) if people do not want to borrow and thus credit creation is limited.
The articles below all look at various different aspects of quantitative easing.
Europeans Disagree Drastically On Fed Rate Cut Deutsche Welle (17/12/08)
Financial crisis: Free money coming your way! Telegraph (17/12/08)
Wondering what on earth Nils was on about? He’s written this for you BBC News Online (PM programme) (18/12/08)
Japan forecasts no growth in 2009 BBC News Online (19/12/08)
New economic policy: If you haven’t got enough of this stuff, just print some more Scotsman (18/12/08)
Ground Zero The Economist (18/12/08)
Fed throws out the rulebook Times Online (18/12/08)
Quantitative easing: the modern way to print money or a therapy of last resort? Telegraph (8/1/09)
Forget hard choices. We need pampering Times Online (18/12/08)
Jeremy Warner: Darling wants say on ‘quantitative easing’ Independent (8/1/09)
Questions
- Define the term ‘quantitative easing’.
- Explain the mechanism by which the monetary authorities can implement a policy of quantitative easing.
- Discuss the relative effectiveness of cuts in interest rates and quantitative easing to boost aggregate demand in a recession.
- Analyse the impact on an economy of a prolonged period of deflation.
Some economists believe that deflation is now a more serious threat than inflation. If this is the case then conventional monetary policy may not be enough to prevent deflation. In the article below, Gavyn Davies argues that the solution is to start thinking like South American dictators and print more money!
We must start thinking like South American dictators Guardian (13/11/08)
Questions
- Explain what is meant by “deflation”.
- Examine the link between deflation and depression.
- Explain why deflation requires a different policy response from inflation.
- Discuss the likely success of a policy of “printing money” in preventing deflation.
- Assess the impact of financing tax cuts through the sale of government bonds in a deflationary situation.
