The Climate Change Pact agreed by leaders at the end of COP26 in Glasgow went further than many pessimists had forecast, but not far enough to meet the goal of keeping global warming to 1.5°C above pre-industrial levels. The Pact states that:
limiting global warming to 1.5°C requires rapid, deep and sustained reductions in global greenhouse gas emissions, including reducing global carbon dioxide emissions by 45 per cent by 2030 relative to the 2010 level and to net zero around mid-century, as well as deep reductions in other greenhouse gases.
So how far would the commitments made in Glasgow restrict global warming and what actions need to be put in place to meet these commitments?
Short-term commitments and long-term goals
According to Climate Action Tracker, the short-term commitments to action that countries set out would cause global warming of 2.4°C by the end of the century, the effects of which would be calamitous in terms of rising sea levels and extreme weather.
However, long-term commitments to goals, as opposed to specific actions, if turned into specific actions to meet the goals would restrict warming to around 1.8°C by the end of the century. These long-term goals include reaching net zero emissions by certain dates. For the majority of the 136 countries agreeing to reach net zero, the date they set was 2050, but for some developing countries, it was later. China, Brazil, Indonesia, Russia, Nigeria, Sri Lanka and Saudi Arabia, for example, set a date of 2060 and India of 2070. Some countries set an earlier target and others, such as Benin, Bhutan, Cambodia, Guyana, Liberia and Madagascar, claimed they had already reached zero net emissions.
Despite these target dates, Climate Action Tracker argues that only 6 per cent of countries pledging net zero have robust policies in place to meet the targets. The problem is that actions are required by firms and individuals. They must cut their direct emissions and reduce the consumption of products whose production involved emissions.
Governments can incentivise individuals and firms through emissions and product taxes, through carbon pricing, through cap-and-trade schemes, through subsidies on green investment, production and consumption, through legal limits on emissions, through trying to change behaviour by education campaigns, and so on. In each case, the extent to which individuals and firms will respond is hard to predict. People may want to reduce global warming and yet be reluctant to change their own behaviour, seeing themselves as too insignificant to make any difference and blaming big business, governments or rich individuals. It is important, therefore, for governments to get incentive mechanisms right to achieve the stated targets.
Let us turn to some specific targets specified in the Climate Change Pact.
Phasing out fossil fuel subsidies
Paragraph 20 of the Climate Change Pact
Calls upon Parties to accelerate … efforts towards the … phase-out of inefficient fossil fuel subsidies, while providing targeted support to the poorest and most vulnerable in line with national circumstances and recognizing the need for support towards a just transition.
Production subsidies include tax breaks or direct payments that reduce the cost of producing coal, oil or gas. Consumption subsidies cut fuel prices for the end user, such as by fixing the price at the petrol pump below the market rate. They are often justified as a way of making energy cheaper for poorer people. In fact, they provide a bigger benefit to wealthier people, who are larger users of energy. A more efficient way of helping the poor would be through benefits or general tax relief. Removing consumption subsidies in 32 countries alone would, according to International Institute for Sustainable Development, cut greenhouse gas emission by an average of 6 per cent by 2025.
The chart shows the 15 countries providing the largest amount of support to fossil fuel industries in 2020 (in 2021 prices). The bars are in billions of dollars and the percentage of GDP is also given for each country. Subsidies include both production and consumption subsidies. (Click here for a PowerPoint of the chart.) In addition to the direct subsidies shown in the chart, there are the indirect costs of subsidies, including pollution, environmental destruction and the impact on the climate. According to the IMF, these amounted to $5.4 trillion in 2020.
But getting countries to agree on a path to cutting subsidies, when conditions vary enormously from one country to another, proved very difficult.
The first draft of the conference agreement called for countries to ‘to accelerate the phasing-out of coal and subsidies for fossil fuels’. But, after objections from major coal producing countries, such as China, India and Australia, this was weakened to calling on countries to accelerate the shift to clean energy systems ‘by scaling up the deployment of clean power generation and energy efficiency measures, including accelerating efforts towards the phasedown of unabated coal power and phase-out of inefficient fossil fuel subsidies’. (‘Unabated’ coal power refers to power generation with no carbon capture.) Changing ‘phasing-out’ to ‘the phasedown’ caused consternation among many delegates who saw this as a substantial weakening of the drive to end the use of coal.
Another problem is in defining ‘inefficient’ subsidies. Countries are likely to define them in a way that suits them.
The key question was the extent to which countries would actually adopt such measures and what the details would be. Would they be strong enough? This remained to be seen.
As an article in the journal, Nature, points out:
There are three main barriers to removing production subsidies … First, fossil-fuel companies are powerful political groups. Second, there are legitimate concerns about job losses in communities that have few alternative employment options. And third, people often worry that rising energy prices might depress economic growth or trigger inflation.
The other question with the phasing out of subsidies is how and how much would there be ‘targeted support to the poorest and most vulnerable in line with national circumstances’.
Financial support for developing countries
Transitioning to a low-carbon economy and investing in measures to protect people from rising sea levels, floods, droughts, fires, etc. costs money. With many developing countries facing serious financial problems, especially in the light of measures to support their economies and healthcare systems to mitigate the effects of COVID-19, support is needed from the developed world.
In the COP21 Paris Agreement in 2015, developed countries pledged $100 billion by 2020 to support mitigation of and adaptation to the effects of climate change by developing countries. But the target was not reached. The COP26 Pact urged ‘developed country Parties to fully deliver on the $100 billion goal urgently and through to 2025’. It also emphasised the importance of transparency in the implementation of their pledges. The proposal was also discussed to set up a trillion dollar per year fund from 2025, but no agreement was reached.
It remains to be seen just how much support will be given.
Then there was the question of compensating developing countries for the loss and damage which has already resulted from climate change. Large historical polluters, such as the USA, the UK and various EU countries, were unwilling to agree to a compensation mechanism, fearing that any recognition of culpability could make them open to lawsuits and demands for financial compensation.
- More than 100 countries at the meeting agreed to cut global methane emissions by at least 30 per cent from 2020 levels by 2030. Methane is a more powerful but shorter-living greenhouse gas than carbon. It is responsible for about a third of all human-generated global warming. China, India and Russia, however, did not sign up.
- Again, more than 100 countries agreed to stop deforestation by 2030. These countries include Indonesia and Brazil, which has been heavily criticised for allowing large parts of the Amazon rainforest to be cleared for farming, such that the Amazon region in recent years has been a net emitter of carbon from the felling and burning of trees. The pledge has been met with considerable cynicism, however, as it unclear how it will be policed. Much of the deforestation around the world is already illegal but goes ahead anyway.
- A mechanism for trading carbon credits was agreed. This allows countries which plant forests or build wind farms to earn credits. However, it may simply provide a mechanism for rich countries and businesses to keep emitting as usual by buying credits.
- Forty-five countries pledged to invest in green agricultural practices to make farming more sustainable.
- Twenty-two countries signed a declaration to create zero-emission maritime shipping routes.
- The USA and China signed a joint declaration promising to boost co-operation over the next decade on various climate actions, including reducing methane emissions, tackling deforestation and regulating decarbonisation.
Blah, blah, blah or real action?
Many of the decisions merely represent targets. What is essential is for countries clearly to spell out the mechanisms they will use for achieving them. So far there is too little detail. It was agreed, therefore, to reconvene in a year’s time at COP27 in Egypt. Countries will be expected to spell out in detail what actions they are taking to meet their emissions targets and other targets such as ending deforestation and reducing coal-fired generation.
- COP26 ended with the Glasgow Climate Pact. Here’s where it succeeded and failed
CNN, Angela Dewan and Amy Cassidy (14/11/21)
- Good COP, Bad COP: Separating heat from light at the climate summit
Ing, Samuel Abettan, Gerben Hieminga and Coco Zhang (15/11/21)
- COP26: What was agreed at the Glasgow climate conference?
BBC News (15/11/21)
- Five Things You Need to Know About The New Glasgow Climate Pact
The Conversation, Simon Lewis and Mark Maslin (13/11/21)
- Infographic: What has your country pledged at COP26?
Aljazeera, Hanna Duggal (14/11/21)
- Cop26: world on track for disastrous heating of more than 2.4C, says key report
The Guardian, Fiona Harvey (9/11/21)
- Cop26 took us one step closer to combating the climate crisis
The Guardian, Christiana Figueres (15/11/21)
- After the failure of Cop26, there’s only one last hope for our survival
The Guardian, George Monbiot (14/11/21)
- Why fossil fuel subsidies are so hard to kill
Nature, Jocelyn Timperley (20/10/21)
- The COP26 blah blah blah detector
Rappler, Elpidio Peria (16/11/21)
- What were the main achievements of COP26?
- What were the main failings of COP26?
- How can people be incentivised to reduce their direct and indirect greenhouse gas emissions?
- How is game theory relevant to understanding the difficulties in achieving global net zero emissions?
- Should developing countries be required to give up coal power?
- If the world is to achieve net zero greenhouse gas emissions, should all countries achieve net zero or should some countries achieve net negative emissions to allow others to continue with net positive emissions (albeit at a lower level)?
At a meeting of the G7 finance ministers in London from 4–5 June, it was agreed to adopt a minimum corporate tax rate of 15% and to take measures to prevent multinational companies using tax havens to avoid paying taxes. It was also agreed that part of the taxes paid should go to the countries where sales are made and not just to those where the companies are based.
This agreement is the first step on the road to a comprehensive global agreement. The next step is a meeting of the finance ministers and central bank governors of the G20 countries in Venice from 9 to 10 July. The G7 ministers hope that their agreement will be adopted by this larger group, which includes other major economies such as Russia, China, India, Brazil, Australia, South Korea and South Africa.
Later in July, the proposals will be put to a group of 139 countries and jurisdictions at a meeting co-ordinated by the OECD. It is hoped that this meeting will finalise an international agreement with precise details on corporate tax rules. It follows work by the OECD on reforming international taxation under its Framework on Base Erosion and Profit Shifting (BEPS).
These meetings follow growing concerns about the ability of multinational companies to avoid taxes by basing regional headquarters in low-tax countries, such as Luxembourg or Singapore, and declaring their profits there, despite having only a tiny proportion of their sales in these countries.
The desire to attract multinational profits has led to a prisoners’ dilemma situation, whereby countries have been competing against each other to offer lower taxes, even though it reduces global corporate tax revenues.
With many countries having seen a significant rise in government deficits as result of the COVID-19 pandemic and the support measures put in place, there has been a greater urgency to reach international agreement on corporate taxes. The G7 agreement, if implemented, will provide a significant increase in tax revenue.
Details of the G7 agreement
The agreement has two parts or ‘pillars’.
Pillar 1 allows countries to tax large multinationals earning global profits of more than 10% if these companies are not based there but earn revenues there. Countries will be given tax rights over at least 20% of the profits earned there which exceed the 10% margin. The level of profits determined for each country will be based on the proportion of revenues earned there.
Pillar 2 sets a minimum corporate tax rate of 15% for each of the seven countries, which call on other countries to adopt the same minimum. The hope is that the G20 countries will agree to this and then at the OECD meeting in July a global agreement will be reached. If a country chooses to charge a rate below 15%, then a top-up tax can be applied by the home country to bring the total rate up to the 15%.
It is possible that these proposals will be strengthened/amended at the G20 and OECD meetings. For example, the 15% minimum rate may be raised. Indeed, the USA had initially proposed a 25% rate and then 21%, and several EU countries such as France, have been pushing for a substantially higher rate.
The agreement was hailed as ‘historic’ by Rishi Sunak, the UK Chancellor of the Exchequer. This is true in that it is the first time there has been an international agreement on minimum corporate tax rates and locating part of tax liability according to sales. What is more, the rules may be strengthened at the G20 and/or OECD meetings.
There have been various criticisms of the agreement, however. The first is that 15% is too low and is well below the rates charged in many countries. As far as the UK is concerned, the IPPR think tank estimates that the deal will raise £7.9bn whereas a 25% rate would raise £14.7bn.
Another criticism is that the reallocation of some tax liabilities to countries where sales are made rather than where profits are booked applies only to profits in excess of 10%. This would therefore not affect companies, such as Amazon, with a model of large-scale low-margin sales and hence profits of less than 10%.
Also there is the criticism that a 20% reallocation is too low and would thus provide too little tax revenue to poor countries which may record large sales but where little or no profits are booked.
The UK was one of the more reluctant countries to sign up to a deal that would have a significant impact on tax havens in various British overseas territories and crown dependencies, such as the British Virgin islands, Bermuda, the Cayman Islands, the Channel Islands and Isle of Man. The agreement also calls into question whether the announced UK freeports can go ahead. Although these are largely concerned with waiving tariffs and other taxes on raw materials and parts imported into the freeport, which are then made into finished or semi-finished products within the freeport for export, they are still seen by many as not in the spirit of the G7 agreement.
What is more, the UK has been pushing for financial services to be exempted from Pillar 1 of the deal, which would otherwise see taxes partly diverted from the UK to other countries where such firms do business. For example, HSBC generates more than half its income from China and Standard Chartered operates mostly in Asia and Africa.
Update: July 2021
The G7 plan was agreed by the finance ministers of the G20 countries on July 11 in Venice. By that point, 130 of the 139 countries which are part of the Inclusive Framework of the OECD and which represent more than 90% of global GDP, had signed up to the plan and it was expected that there would be a global agreement reached at the OECD meeting later in the month. The other nine countries were Ireland, Hungary and Estonia in the EU and Kenya, Nigeria, Peru, Sri Lanka, Barbados and Saint Vincent and the Grenadines. Several of these countries use low corporate taxes to encourage inward investment and are seen as tax havens.
- G-7 nations reach historic deal on global tax reform
CNBC, Silvia Amaro, Joanna Tan and Emma Newburger (5/6/21)
- Rishi Sunak hails ‘historic’ breakthrough as G7 ministers agree global tech tax deal
The Telegraph, Lucy Burton and Edward Malnick (5/6/21)
- G7 backs Biden’s sweeping overhaul of global tax system
CNN, Tara John and Kevin Liptak (5/6/21)
- ‘Historic’ G7 deal to stop global corporate tax avoidance welcomed by tech giants Google and Facebook
Sky News, Ajay Nair (6/6/21)
- Finance Leaders Reach Global Tax Deal Aimed at Ending Profit Shifting
New York Times, Alan Rappeport (5/6/21)
- G7 strikes historic agreement on taxing multinationals
Financial Times, Chris Giles (5/6/21)
- G7 tax deal is ‘starting point’ on road to global reform
LAPM Journal, Chris Giles and Delphine Strauss (FT) (6/6/21)
- G7 tax deal doesn’t go far enough, campaigners say
BBC News (6/6/21)
- Rishi Sunak announces ‘historic agreement’ by G7 on tax reform
The Observer, Phillip Inman and Michael Savage (5/6/21)
- G7 deal is as much about balance of power as global tax reform
The Guardian, Richard Partington (6/6/21)
- Global G7 deal may let Amazon off hook on tax, say experts
The Guardian, Jasper Jolly (6/6/21)
- Explainer: G7 tax deal – what was agreed and what does it mean for Ireland?
The Irish Times, Cliff Taylor (5/6/21)
- G7 deal: UK is badly conflicted between offshore tax havens and Biden’s global tax drive
The Conversation, Atul K. Shah (4/6/21)
- G7 tax dodging deal ‘sets bar so low companies can just step over it’
Independent, Emily Goddard (6/6/21)
- UK pushes for City of London to be exempt from G7 tax plan
The Guardian, Phillip Inman and Richard Partington (9/6/21)
- The global pandemic, sustainable economic recovery, and international taxation
Independent Commission for the Reform of International Corporate Taxation (May 2020)
- G20 finance ministers back deal to tax companies
BBC News (11/7/21)
- How are multinationals currently able to avoid paying corporate taxes in many countries, even though their sales may be high there?
- If the deal is accepted at the OECD meeting in July, would it still be in the interests of low-tax countries to charge tax rates below the agreed minimum rate?
- Why was the UK reluctant to accept the 21% rate proposed by the Biden administration?
- Find out about the digital services tax that has been adopted by many countries, including EU countries and the UK, and why it will be abolished once a minimum corporate tax comes into force.
- Argue the case for and against taxing the whole of multinational profits in countries where they earn revenue in proportion to the company’s total global revenue. Would such a system benefit developing countries?
- Should financial services, such as those provided by City of London firms, be exempted from the deal?
You’ve had a busy day at work. You check your watch; it’s almost 5pm. You should be packing soon – except, your boss is still in their office. You shouldn’t really be seen leaving before your boss, should you? You don’t want to be branded as ‘that guy’ – the one who is ‘not committed’, ‘not willing to go the extra mile’, ‘not flexible enough’, first out of the door’ – you don’t want to have that label pinned on your performance appraisal. After all, your boss is still hard at work, and so are your other colleagues.
So you wait, pretending to work – although you do not really do much – perhaps you’re checking Facebook, reading the news or similar. And so does your boss, not wanting to be seen leaving before anyone else. But what example is this going to set for you and your other colleagues. You all wait for someone to make the first move – a prisoner’s dilemma situation. The only difference is that it’s you who is the prisoner in this situation, also known as ‘presenteeism’.
What is presenteeism? If you search the term on Google Scholar or Scopus, you will come across a number of articles in the fields of health and labour economics that define presenteeism as a phenomenon in which employees who feel physically unwell choose to go to work, or stay on at work, rather than asking for time off to get better (see, for instance, Hansen and Andersen, 2008 and several others). This is also known as ‘sickness presenteeism’.
According to Cooper and Lu (2016), however, the use of the term can be extended to describe a wider situation in which a worker is physically present at their workplace but not functioning (by reason of tiredness, physical illness, mental ill-health, peer pressure or whatever else). As explained in Biron and Saksvik (2009):
Cooper’s conceptualisation of presenteeism implied that presenteeism was a behaviour determined by specific determinants (i.e. long working hours and a context of uncertainty). This tendency to stay at work longer than required to display a visible commitment is what Simpson (1998) calls ‘competitive presenteeism’ where people compete on who will stay in the office the longest.
Unsurprisingly, the effect of presenteeism on the wellbeing of workers and the economic performance of firms has been looked at extensively from different angles and disciplines – including health economists, organisational behaviour and labour economists – for a recent and comprehensive review of the literature on this topic see Lohaus and Habermann (2019). Most of these studies agree that the effects of presenteeism are negative; in particular, they identify significant negative effects on the physical health of workers (Skagen and Collins, 2016); emotional exhaustion and mental health issues (Demerouti et al, 2009); persistent productivity loss (Warren et al, 2011); lower work engagement and negative feelings (Asfaw et al, 2017) – among several others. There seems, therefore, to be plenty of convincing evidence that presenteeism is bad for everyone – business owners, managers and staff.
So next time that you find yourself stuck at work working silly hours, feeling totally unproductive and just staying to be seen, email this blog to your boss and other colleagues – and ask them if they wish to join you for a drink or a walk.
(By the way, there’s a saying that in the UK the last one to leave the office is seen as the hardest working, whereas in Germany the last one to leave the office is seen as the least efficient!)
- Going ill to work–what personal circumstances, attitudes and work-related factors are associated with sickness presenteeism?
Social science & medicine, Vol 67(6), pp.956–64, Claus D Hansen and Johan Hviid Andersen (June 2008)
- Presenteeism as a global phenomenon
Cross Cultural & Strategic Management, Vol 23(2) pp.216–31, Cary L Cooper and Luo Lu (April 2016)
- Sickness presenteeism and attendance pressure factors: Implications for practice
International handbook of work and health psychology, Chapter 5, Caroline Biron and Per Øystein Saksvik (11/12/09)
- Presenteeism, Power and Organizational Change: Long Hours as a Career Barrier and the Impact on the Working Lives of Women Managers
British Journal of Management, Vol 9(1) pp.37–50, Ruth Simpson (September 1998)
- Presenteeism: A review and research directions
Human Resource Management Review, Vol 29(1), pp.43–58, Daniela Lohaus and Wolfgang Habermann (March 2019)
- The consequences of sickness presenteeism on health and wellbeing over time: A systematic review
Social Science & Medicine, Vol 161, pp.169–77, Kristian Skagen and Alison M.Collins (July 2016)
- Present but sick: a three‐wave study on job demands, presenteeism and burnout
Career Development International, Vol 14(1), pp.50–68, Evangelia Demerouti, Pascale M Le Blanc, Arnold B Bakker, Wilmar B Schaufeli and Joop Hox (2009)
- Cost burden of the presenteeism health outcome: Diverse workforce of nurses and pharmacists
Journal of Occupational and Environmental Medicine, Vol 53(1), pp.90–9, Carol L Warren, Shelley White-Means, Mona Wicks, Cyril F Chang, Dick Gourley and Muriel Rice (January 2011)
- Potential Economic Benefits of Paid Sick Leave in Reducing Absenteeism Related to the Spread of Influenza-Like Illness
Journal of occupational and environmental medicine Vol 59(9), pp.822–9, Abay Asfaw, Roger Rosa and Regina Pana-Cryan (September 2017)
- ‘Presenteeism leads to lower productivity and firm performance and should be discouraged by business owners and managers’. Discuss.
- In a recent interview given to Reuters, Jack Ma, the Chinese billionaire and owner of Ali Baba, defended his ‘996 work model’ (working 9am to 9pm for 6 days a week) as a ‘huge blessing’. Find and review some articles on this topic, and use them to write a response. Your response should be substantiated using relevant economic theory and empirical research.
- Have you or anyone you know found yourself guilty of presenteeism? Share your experience with the rest of the class, focusing on effects on productivity and your attitude towards your employer and work colleagues.
In 2015, at the COP21 climate change conference in Paris, an agreement was reached between the 195 countries present. The Paris agreement committed countries to limiting global warming to ‘well below’ 2°C and preferably to no more than 1.5°C. above pre-industrial levels. To do this, a ‘cap-and-trade’ system would be adopted, with countries agreeing to limits to their emissions and then being able to buy emissions credits to exceed these limits from countries which had managed to emit below their limits. However, to implement the agreement, countries would need to adopt a ‘rulebook’ about how the permitted limits would be applied, how governments would measure and report emissions cuts, how the figures would be verified and just how a cap-and-trade system would work.
At the COP24 meeting from 2 to 15 December 2018 in Katowice, Poland, nearly 14 000 delegates from 196 countries discussed the details of a rulebook. Despite some 2800 points of contention and some difficult and heated negotiations, agreement was finally reached. Rules for targeting, measuring and verifying emissions have been accepted. If countries exceed their limits, they must explain why and also how they will meet them in future. Rich countries agreed to provide help to poor countries in curbing their emissions and adapting to rising sea levels, droughts, floods and other climate-induced problems.
But no details have been agreed on the system of carbon trading, thanks to objections from the Brazilian delegates, who felt that insufficient account would be made of their country’s existing promises on not chopping down parts of the Amazon rainforest.
Most seriously, the measures already agreed which would be covered by the rulebook will be insufficient to meet the 2°C, let alone the 1.5°C, target. The majority of the measures are voluntary ‘nationally determined contributions’, which countries are required to submit under the Paris agreement. These, so far, would probably be sufficient to limit global warming to only around 3°C, at which level there would be massive environmental, economic and social consequences.
There was, however, a belief among delegates that further strong international action was required. Indeed, under the Paris agreement, emissions limits to keep global warming to the ‘well below 2°C’ level must be agreed by 2020.
Climate change is a case of severe market failure. A large proportion of the external costs of pollution are borne outside the countries where the emitters are based. This creates a disincentive for countries acting alone to internalise all these externalities through the tax system or charges, or to regulate them toughly. Only by countries taking an international perspective and by acting collectively can the externalities be seen as a fully internal problem.
Even though most governments recognise the nature and scale of the problem, one of the biggest problems they face is in persuading people that it is in their interests to cut carbon emissions – something that may become increasingly difficult with the rise in populism and the realisation that higher fuel and other prices will make people poorer in the short term.
- To what extent can the atmosphere been seen as a ‘global commons’?
- What incentives might be given for business to make ‘green investments’?
- To what extent might changes in technology help businesses and consumers to ‘go green’?
- Why might international negotiations over tackling climate change result in a prisoner’s dilemma problem? What steps could be taken to tackle the problem?
- How would an emissions cap-and-trade system work?
- Investigate the Brazilian objections to the proposals for emissions credits. Were the delegates justified in their objections?
- What types of initiative could businesses take to tackle ‘supply chain emissions’?
- How could countries, such as the USA, be persuaded to reduce their reliance on coal – an industry lauded by President Trump?
A professor in the USA recently posed an interesting dilemma to students taking his psychology exam. At the end of the exam students were provided with a bonus question in order to gain extra credit. All they had to do was decided whether they would like two or six additional marks adding on to their final score. The twist was that if more than 10% of the class opted for an additional six marks then everyone would get nothing added on!
The professor had placed the students in a prisoner’s dilemma scenario. To see this consider an individual student weighing up which option to choose; if more than 90% of the class chose two additional marks, then this student is better off choosing six additional marks. Whereas if more than 90% of the class chose six additional marks, then this student is indifferent between the two options (the student will get no additional marks regardless of their choice). It follows that choosing six additional marks is a weakly dominant strategy.
In a similar fashion, in the classic prisoners setting keeping quiet is collectively better, however, each criminal has a strong individual incentive to confess. Likewise, in oligopoly markets the interdependence between firms results in a tension between cooperation and competition. Firms collectively benefit from keeping prices high, but an individual firm has an incentive to undercut its rivals and steal a large share of the market. A strong prediction when self-interested participants play the prisoner’s dilemma game just once and choose their strategies independently is therefore that the prisoners will confess to the crime and that firms will set low prices.
So did the US professor end up giving away many bonus marks? No, about 20% of the class opted for six additional marks and as a result all the students ended up with no extra marks. In fact, the professor claims to have been running the same experiment for the previous seven years and only once has he ended up giving away any bonus marks. On the one hand, this result is consistent with what is predicted in the prisoner’s dilemma game. However, running contrary to this is the fact that around 80% of the students opted for just two additional marks. It would certainly be interesting to see what would happen if in future years the professor relaxed the threshold above which all students get no extra marks.
UMD ‘tragedy of the commons’ tweet goes viral The Baltimore Sun, Quinn Kelley (09/07/15)
A professor tested the ‘Prisoner’s Dilemma’ on his students by bribing them with extra credit points Tech Insider, Will Haskell (17/07/15)
- Draw the payoff matrix for the student’s dilemma.
- What are some of the possible explanations for around 80% of the class choosing two extra marks?
- How do you think the outcome of the game might have changed if students were allowed to communicate with each other before making their choice on the number of additional marks to ask for?
- How do you think student choices would change if the threshold above which all students get no extra marks was varied?