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
- What is meant by the ‘prisoners’ dilemma’? How is this a demonstration of a sub-optimal Nash equilibrium in a non-cooperative game?
- Why is it difficult to predict the outcome of a non-cooperative game?
- Give some examples of non-cooperative games played by companies competing with each other.
- Give some examples of non-cooperative games played by nations competing with each other.
- Why do competition authorities try to prevent cooperation between businesses?
- Why may a cooperative equilibrium between firms be an unstable one?
New Look was founded in 1969 and is an iconic budget retailer found on most British high streets. In its history, it has been a family business; it has been listed on the London stock exchange; returned to a private company and then had the potential to be re-listed. Now, it is moving into South African ownership for £780 million.
90% of New Look will now be owned by Christo Wiese who controls Brait and who has been linked with other take-overs of British retailers in recent years. The remaining 10% will remain in the hands of the founding family. The company has been struggling for some time and in 2010 did have plans to relist the company on the London Stock Exchange. However, volatile market conditions meant that this never occurred and the two private equity firms, Apax and Permira, appeared very eager to sell. New Look’s Chairman, Paul Mason, said:
“This is an ideal outcome for New Look. The Brait team demonstrated to us that they have the long-term vision to help Anders and the team grow this brand.”
It is not yet clear what this move will mean for the retailer, New Look, but with an estimated £1 billion debt, it is expected that changes will have to be made. 
It is certainly an attractive investment opportunity and New Look does have a history of high rates of growth, despite its current debt. Furthermore, the debt levels are likely to have helped Mr. Wiese obtain a deal for New Look. Fashion retailing is a highly competitive market, but demand always appears to be growing. It is still relatively ‘new’ news, so we will have to wait to see what this means for the number of stores we see on the high streets and the number of jobs lost or created. The following articles consider this new New Look.
South African tycoon buys New Look fashion retailer BBC News (15/5/15)
South African tycoon enters UK retail fray with New Look purchase Financial Times, Andrea Felsted, Clare Barrett and Joseph Cotterill (15/5/15)
New Look snapped up by South African tycoon The Guardian, Sean Farrell (15/5/15)
New Look sold to South African billionaire for £780m The Telegraph, Elizabeth Anderson and Andrew Trotman (15/5/15)
Questions
- Why might a company become listed on the London stock exchange?
- How would volatile economic circumstances affect a company’s decision to become listed on the stock market?
- What do you think this purchase will mean for the number of New Look stores on British high streets? Do you think there will be job losses or jobs created by this purchase?
- How do you think the level of New Look’s debt affected Christo Wiese’s decision to purchase New Look?
- Which factors are likely to affect a firm’s decision to take-over or purchase another firm?
For years, the UK consumer organisation, Which?, has exposed misleading supermarket pricing practices. These include bogus price reductions, ‘cheaper’ multi-buys, smaller pack sizes and confusing special offers. Claiming that these practices are still continuing, Which? has made a super-complaint (available to designated consumer bodies) to the competition regulator, the Competition and Markets Authority (CMA).
Commenting on this action, Which? executive director, Richard Lloyd said:
“Despite Which? repeatedly exposing misleading and confusing pricing tactics, and calling for voluntary change by the retailers, these dodgy offers remain on numerous supermarket shelves. Shoppers think they’re getting a bargain but in reality it’s impossible for any consumer to know if they’re genuinely getting a fair deal.
We’re saying enough is enough and using one of the most powerful legal weapons in our armoury to act on behalf of consumers by launching a super-complaint to the regulator. We want an end to misleading pricing tactics and for all retailers to use fair pricing that people can trust.”
The CMA will consider the issues raised under the super-complaint to establish whether any of them are significantly harming the interests of consumers. It will publish a response within 90 days from the receipt of the complaint on 21 April 2015. The possible outcomes include:
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recommending the quality and accessibility of information for consumers is improved |
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encouraging businesses in the market to self-regulate |
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making recommendations to government to change the legislation or public policy |
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taking competition or consumer enforcement action |
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instigating a market investigation or market study |
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a clean bill of health |
Some 40% of groceries are sold on promotion. Supermarkets are well aware that consumers love to get a bargain and use promotions to persuade consumers to buy things they might not otherwise have done.
What is more, consumer rationality is bounded by the information and time available. People are often in a hurry when shopping; prices change frequently; people are often buying numerous low-value items; and they don’t know what competitors are charging. People may thus accept an offer as genuine and not spend time investigating whether it is so. Supermarkets know this and use all sorts of tactics to try to persuade people that they are indeed getting a bargain.
Videos
Supermarkets Face Super-Complaint On Pricing Sky News (21/4/15)
UK supermarkets face possible probe over pricing practices Reuters, Neil Maidment (21/4/15)
Which? launches ‘super-complaint’ against supermarkets BBC News, Stephanie McGovern (21/4/15)
Articles
UK supermarkets dupe shoppers out of hundreds of millions, says Which? The Guardian, Rebecca Smithers (21/4/15)
Supermarkets face inquiry into ‘rip-offs’ The Telegraph, Dan Hyde (21/4/15)
15 supermarket rip-offs that led to an inquiry The Telegraph, Dan Hyde (21/4/15)
What does Which?’s supermarket pricing complaint mean for you? The Guardian (21/4/15)
Supermarkets hit back over Which? report on pricing Financial Times (21/4/15)
Press release
Which? ‘super-complains’ about misleading supermarket pricing practices Which? (21/4/15)
CMA case page
Groceries pricing super-complaint Competition and Markets Authority (21/4/15)
Questions
- Give examples of supermarket offers that are misleading.
- Why are supermarkets able to ‘get away with’ misleading offers?
- How can behavioural economics help to explain consumer behaviour in supermarkets?
- Identify some other super-complaints have been made to the CMA or its predecessor, the Office of Fair Trading. What were the outcomes from the resulting investigations.
- What is meant by ‘heuristics’? How might supermarkets exploit consumers’ use of heuristics in their promotions?
Many of the major industries in Australia are oligopolies/oligopsonies. Examples include banking, telecoms, supermarkets, insurance and iron ore. The dominant firms in these markets have been accused of exploiting their market power, both in charging high prices to consumers and driving down the prices paid to suppliers. The result, it is claimed, is that they have been making excessive profits.
But things may be changing. With the rise of online trading, barriers to entry in these markets have been falling. Many of the new entrants are established firms in other countries and hence already have economies of scale.
The first article below examines the challenge to established oligopolists in Australia.
Articles and blogs
The death of the oligopoly: Australia’s incumbents face new rivals Financial Review (Australia), Michael Smith (21/4/15)
Australian Oligopolies The Grapevine, Adam Dimech (27/12/14)
Paper
Breaking up Australia’s oligopolies Ashurst Australia (14/8/13)
Questions
- Find out which are the major firms in Australia in the five industries identified above. What is their market share and how has this been changing?
- What barriers to entry exist in each of these industries in Australia? To what extent have they been declining?
- What can new entrants do to overcome the barriers to entry?
- What technological developments allow other companies to challenge Foxtel’s pay television monopoly?
- To what extent are developments in the supermarket industry in Australia similar to those in the UK?
- To what extent does Australia benefit from increased globalisation?
Over 90% of UK households buy their gas and electricity from one of the ‘big six’ energy suppliers – British Gas (Centrica), EDF, E.ON, npower (RWE), Scottish Power (Iberdrola) and SSE. The big six are currently being investigated by the Competition and Markets Authority (CMA) for possible breach of a dominant market position.
An updated ‘issues statement‘ summarises the investigation group’s initial thinking based on the evidence it has received. In paragraph 16 it states:
Comparing all available domestic tariffs – including those offered by the independent suppliers – we calculate that, over the period Quarter 1 2012 to Quarter 2 2014, over 95% of the dual fuel customers of the Six Large Energy Firms could have saved by switching tariff and/or supplier and that the average saving available to these customers was between £158 and £234 a year (depending on the supplier).
Between 40% and 50% of customers have been with a supplier for more than 10 years. The companies are thus accused of exploiting these ‘loyalty’ customers, many of whom are too busy or ill-informed to switch to an alternative supplier. According to the uSwitch article below:
This is a particular issue for the most vulnerable of customers, including the elderly, who view switching as ‘impossible’.
But the elderly were not the only consumers losing out; the CMA found that those customers most likely to be on expensive standard tariffs were less educated, or on lower incomes, or single parents, and did not necessarily have access to the Internet.
And the problem of penalising ‘loyalty’ customers who do not shop around applies in other industries, most notably banking. People who regularly switch savings accounts can get higher interest rates, often for a temporary ‘introductory’ period. Similarly, people who regularly transfer credit card debt from one card to another can take advantage of low interest rate, or even zero interest rate, deals for an introductory period.
Returning to the energy industry. Is the problem one of oligopoly? Do the big six have too much market power and, if so, what can be done about it? Should they be split up? Should regulation be tightened? Should new entrants be encouraged and, if so, what specific measures can be taken? The following articles explore the issues and possible policies.
Articles
British energy customers missed out on savings Reuters, Nina Chestney (18/2/15)
U.K. Energy Customers Could Save by Shopping Around: CMA BloombergBusiness, Aoife White (18/2/15)
Big six energy firms overcharging customers by up to £234 a year The Guardian, Sean Farrell (18/1/15)
Big six energy firms may lose quarter of customers by 2020, analysts warn The Guardian, Terry Macalister (1/10/14)
UK watchdog says big energy groups do not enjoy unfair advantage Financial Times, Michael Kavanagh (18/2/15)
CMA energy market investigation update: millions are punished for being loyal uSwitch, Lauren Vasquez (19/2/15)
Gas and electricity bills – the key questions Channel 4 News (18/2/15)
Energy customers miss big savings, says CMA inquiry BBC News, John Moylan (18/2/15)
Big Six energy companies overcharging loyal customers by up to £234 a year says watchdog Independent, Simon Read (18/2/15)
Consumer groups demand change after ‘Big Six’ accused of penalising customers out of hundreds of pounds Independent, Simon Read (19/2/15)
Energy companies’ loyalty problem lights the way forward The Conversation, Bridget Woodman (19/2/15)
CMA press releases and reports
Energy market investigation – updated issues statement Competition and Markets Authority (18/2/15)
Energy market investigation Competition and Markets Authority (23/2/15)
Energy Market Investigation: Updated Issues Statement Competition and Markets Authority (18/2/15)
Questions
- What barriers to entry exist in the electricity and gas supply markets?
- Explain how the big six are practising price discrimination. What form does it take and how are the markets separated?
- Find out what tariffs are offered by each of the big six. When you have done so, reflect on how easy it was to find out the information and why so few customers switch.
- How could more people be encouraged to ‘shop around’ and switch energy suppliers?
- Explain the five theories of harm identified by the CMA. Would a rise in market share of the smaller energy suppliers adequately combat each of the five types of harm?
- In what ways may UK energy regulation be ‘a barrier to pro-competitive innovation and change’?
- What are the arguments for and against breaking up the big six?
- What are the arguments for and against electricity and gas price control?
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.
