Month: June 2015

The eurozone has been suffering from deflation: that is, negative inflation. But, the latest data show an increase in the rate of inflation in April from 0% to 0.3%. This is still a very low rate, with a return to deflation remaining a possibility (though perhaps unlikely); but certainly an improvement.

The eurozone economy has been stagnant for some time but the actions of the European Central Bank (ECB) finally appear to be working. Prices across the eurozone have risen, including services up by 1.3%, food and drink up by 1.2% and energy prices, albeit still falling, but at a slower rate. All of this has helped to push the annual inflation rate above 0%. For many, this increase was bigger than expected. Howard Archer, Chief European Economist at HIS Global Insight said:

“Renewed dips into deflation for the eurozone are looking increasingly unlikely with the risks diluted by a firming in oil prices from their January lows, the weakness of the euro and improved eurozone economic activity.”

Economic policy in the eurozone has focused on stimulating the economy, with interest rates remaining low and a €1.1 trillion bond-buying programme by the ECB. But, why is deflation such a concern? We know that one of the main macroeconomic objectives of a nation is low and stable inflation. If prices are low (or even falling) is it really as bad as economists and policy-makers suggest?

The problem of deflation occurs when people expect prices to continue falling and thus delay spending on durables, hoping to get the products cheaper later on. As such, consumption falls and this puts downward pressure on aggregate demand. This decision by consumers to put off spending will cause aggregate demand to shift to the left, thus pushing national income down, creating higher unemployment and adding to problems of economic stagnation. If this expectation continues, then so will the inward shifts in AD. In the eurozone, this has been a key problem, but it now appears that aggregate demand has stopped falling and is now slowly recovering, together with the economy.

It is important to note how interdependent all aspects of an economy are. The euro responded as news of better inflation data emerged, together with expectations of a Greek deal being reached. Enrique Diaz-Alvarez, chief risk officer at Ebury said:

“The move [rise in euro] got going with the big upside surprise in eurozone inflation data — especially core inflation, which bounced up from 0.6 per cent to 0.9 per cent. This is exactly what the ECB wants to see, as it is proof that QE is having the desired effect and removes the threat of deflation in the eurozone from the foreseeable future.”

One of the key factors that has kept inflation down in the eurozone (and also the UK) is falling oil prices. It is for this reason that many have been suggesting that this type of deflation is not bad deflation. With oil prices recovering, the general price level will also recover and so economies will follow suit. The following articles consider the fortunes of the eurozone.

Eurozone inflation shouldn’t shift ECB’s QE focus Wall Street Journal, Richard Barley (2/6/15)
Eurozone deflation threat recedes Financial Times, Claire Jones (2/6/15)
Eurozone inflation rate rises to 0.3% in May BBC News (2/6/15)
Eurozone back to inflation as May prices beat forecast Reuters, Jan Strupczewski (2/6/15)
Boost for ECB as Eurozone prices turn positive in May Guardian, Phillip Inman (2/6/15)
Eurozone inflation higher than expected due to quantitative easing International Business Times, Bauke Schram (2/6/15)
Euro lifted by Greek deal hopes and firmer inflation data Financial Times, Roger Blitz and Michael Hunter (2/6/15)

Questions

  1. What is the difference between the 0.3% and 0.9% figures quoted for inflation in the eurozone?
  2. What is deflation and why is it such a concern?
  3. Illustrate the impact of falling consumer demand in an AD/AS diagram.
  4. How has the ECB’s QE policy helped to tackle the problem of deflation? Do you think that this programme needs to continue or now the economy has begun to improve, should the programme end?
  5. To what extent is the economic stagnation in the eurozone a cause for concern to countries such as the UK and USA? Explain your answer.
  6. Why has the euro risen, following news of this positive inflation data?

John Nash was one of the pioneers of game theory and in 1994 was awarded the Nobel prize in economics for his work in this field. He was also the subject of the 2001 film, A beautiful mind, where the young John Nash was played by Russell Crowe, for which he won an Oscar.

Tragically, John Nash and his wife were killed in a car crash on May 23: he was 86 years old. Since his death there have been many tributes paid to him and his work.

As a student of economics you will almost certainly have studied the concept of a Nash equilibrium: a situation where everyone makes their best choice, given the choices of the other ‘players’ in a ‘game’. But a Nash equilibrium is not in the collective best interests of the participants in a non-cooperative game.

This is a very different concept of equilibrium from the simple equilibrium in a perfectly competitive market. In fact, in the complex world of strategic decision making, where firms are constantly looking at their rivals’ behaviour and possible reactions to their own behaviour, there are all sorts of Nash equilibria which are clearly sub-optimal. Competition may be highly destructive.

The following obituaries look at Nash’s contribution to the development of economics. As the Bloomberg article states:

The game theory concepts that Nash’s math[s] brought to the field were a true paradigm shift in economics. Macroeconomists, who continue to use the old Walrasian notion of equilibrium typically engage in hand-waving about how the macroeconomy is too big for strategic interactions to matter. But most of the economics profession has gradually shifted toward Nash equilibrium. The 2014 Nobel winner, Jean Tirole, is emblematic of the new economics. And many of the biggest successes in applied economics, like the auctions that power Google’s advertising, rely on Nash’s technique.

Do we owe him as much as Adam Smith?

Articles

Death of John Nash and His Beautiful Ideas Bloomberg, Noah Smith (26/5/15)
John Nash, economist and mathematician, 1928–2015 Financial Times, Ferdinando Giugliano (25/5/15)
Obituary: John Nash: Lost and found The Economist (28/5/15)
Remembering John Nash: Finding equations to explain the world The Economist (28/5/15)
John F. Nash Jr., Math Genius Defined by a ‘Beautiful Mind,’ Dies at 86 New York Times, Erica Goode (24/5/15)
Explaining a Cornerstone of Game Theory: John Nash’s Equilibrium New York Times, Kenneth Chang (24/5/15)
John Nash’s Indelible Contribution To Economic Analysis Forbes, Jon Hartley (25/5/15)
John Nash’s ground-breaking contributions to maths BBC News, John Moriarty (24/5/15)
From the archives: Nash’s Nobel prize The Economist (24/5/15)
A beautiful strategy: John Nash’s ‘game theory’ explained Hindustan Times, Gaurav Choudhury (25/5/15)

Interview with John Nash

Interview with John Nash Nobelprize.org (Sept 2004)

Questions

  1. What is meant by the ‘prisoners’ dilemma’? How is this a demonstration of a sub-optimal Nash equilibrium in a non-cooperative game?
  2. Why is it difficult to predict the outcome of a non-cooperative game?
  3. Give some examples of non-cooperative games played by companies competing with each other.
  4. Give some examples of non-cooperative games played by nations competing with each other.
  5. Why do competition authorities try to prevent cooperation between businesses?
  6. Why may a cooperative equilibrium between firms be an unstable one?