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.
Recent evidence from the Institute of Economic and Social Research shows that the UK economy grew in April and May and that 2009 Quarter 2 figures will also show a rise in output. Although annual growth in GDP will still be negative, as the previous three quarters were all negative, recent growth suggests that the recession might have ‘bottomed out’ and that recovery is beginning.
Of course, it’s early days to tell whether these are real ‘green shoots’ or whether the economy will slide back into negative growth once more, but confidence is returning. One sign of this is the recent appreciation of sterling (see). The following articles look the rise of the pound, why it is occurring and whether the green shoots will flourish or wither.
Pound hits 2009 high against euro BBC News (11/6/09)
Sterling: what’s the outlook now? Telegraph (11/6/09)
Sterling hits year’s high versus euro ThisIsMoney (11/6/09)
Sterling leaves euro in its wake on hopes of UK recovery The Herald (11/6/09)
Jeremy Warner: Recession may be over but not the pain Independent (11/6/09)
Taking stock of the different economic signals Times Online (11/6/09)
Questions
- Why has the pound been appreciating?
- What are the implications of an appreciation of the pound for the UK economy?
- Why is the dollar likely to fall as the prospects for the world economy brighten?
- What evidence is there that the UK economy is now beginning to recover? What will determine whether or not the recovery will be sustained?
Imagine putting together a dream team of economists to tackle the current recession. Who would you choose? Larry Elliott, the Guardian’s economics editor considers this game of ‘fantasy economics’ in the linked article below. In the process, he makes a number of criticisms of economists for saying little about what caused the current crisis and how such crises could be avoided in the future.
As students studying economics you might want to defend economists against this attack. After all, virtually every time you turn on the radio or television or open a paper, there are economists explaining what has happened and what should be done about it. So see if you can mount a defence against this attack – and maybe put together your own dream team of economists!
It’s a funny old game: where is the dream team of economists to tackle the slump? Guardian (1/6/09)
Profiles of many the economists referred to in Larry Elliott’s article can be found at the History of Economic Thought website. You can access this from the Sloman Hot Links tab above and then click on site C18.
Questions
- Explain why economies with deregulated financial markets are likely to experience macroeconomic instability (‘boom-bust cycles’).
- What are the benefits of studying perfectly competitive markets and general equilibrium theory?
- Write a brief defence of the use of mathematics in economics.
- Does experimental economics allow economists to take a ‘more nuanced and relevant approach’ to studying economic behaviour and devising appropriate policy?
The following articles look at a recently published book by George Akerlof of the University of California, Berkeley, and Robert Shiller of Yale. They examine the role of what Keynes called ‘animal spirits’ and is the title of the book.
The motivation to make economic decisions (to buy, to sell, to invest, etc) may not be ‘rational’ in the sense of carefully weighing up marginal costs and marginal benefits. Rather it can be one of over-optimism in good times or over-pessimism in bad times. Just as individuals have ‘mood swings’, so there can be collective mood swings too. After all, confidence, or lack of it, is contagious. This motivation that drives people to action is what is meant by animal spirits.
But are animal spirits a blessing to be nurtured or a curse to be reined in? Should governments seek to constrain them?
An economic bestiary The Economist (26/3/09)
Good Government and Animal Spirits Wall Street Journal (23/4/09)
Irrational Exuberance New York Times (17/4/09)
Animal Spirits: A Q&A With George Akerlof Freakonomics: New York Times blog (30/4/09)
Questions
- Describe what is meant by ‘animal spirits’ and their effects on human behaviour.
- Why may animal spirits make economies less stable?
- How may animal spirits help to explain exchange rate overshooting?
- Discuss whether governments should seek to constrain animal spirits and make people more ‘rational’? Also consider what methods governments could/should use to do this?
Every six months the OECD publishes its Economic Outlook. This gives annual (and some quarterly) macroeconomic data for each of the 30 OECD countries, for all 30 countries together and for the eurozone. There are 63 tables covering most of the major macroeconomic indicators, most going back 13 years with forecasts for the next two years. OECD Economic Outlook is normally published in June and December.
Similarly, every six months the European Commission’s Economic and Financial Affairs Directorate publishes its European Economy Statistical Annex. This gives annual data for 76 macroeconomic variables for each of the EU countries, plus the USA and Japan. Most of the tables go back to 1970 and forecast ahead for two years. There is also a separate publication, Economic Forecasts. The statistical appendix to this publication has 62 tables, again covering a range of macroeconomic data. The tables go back to 1992 and again forecast ahead for two years. There is a lot of useful commentary about the individual economies of the EU and other major economies, such as the USA, Japan, China and Russia. Both publications normally appear in May and November.
Another organisation to publish 6-monthly forecasts is the International Monetary Fund. The Statistical Appendix of the Word Economic Outlook (after clicking on this, go to link on right), normally published in April and October, gives macroeconomic data for most economies and regions of the world. Forecasts are made ahead for two years and for five years.
The state of the world economy was so severe in early 2009 and was deteriorating so rapidly that earlier forecasts proved far too optimistic. In early 2009, all three organisations published interim forecasts – the European Commission and the IMF in January and the OECD at the end of March. They painted a much bleaker picture than the forecasts published at the end of 2008. What will the next set of forecasts look like? Will they be even bleaker?
The following links take you to these interim forecasts and to articles commenting on them.
EU interim forecasts for 2009–2010: sharp downturn in growth European Commission, Directorate-General for Economic and Financial Affairs (19/1/09)
World Economic Outlook Update IMF (28/1/09)
OECD Interim Economic Outlook, March 2009 OECD (31/3/09)
Global economy set for worst fall since WWII Times Online (31/3/09)
UK economy: We still need to take our medicine Times Online (1/4/09)
OECD predicts 4.3% contraction in richest economies this year Irish Times (1/4/09)
Global Slump Seen Deepening The Wall Street Journal (1/4/09)
Glimmers of hope, forecasts of gloom The Economist (2/4/09)
Questions
- Compare the forecasts for GDP growth, unemployment, inflation and output gaps for some of the major economies made by the OECD at the end of March with those made by the European Commission and the IMF in January and with those made by all three organisations in the autumn of 2008. Why, do you think, are there such large divergences in the forecasts?
- For what reasons might the OECD March forecasts turn out to be (a) much too pessimistic; (b) much too optimistic?
- In the light of the forecasts, should countries adopt further strongly expansionary fiscal policies – something rejected at the G20 summit in Early April (see news item Saving the world)?