Economics studies the choices people make. ‘Rational choice’ involves the weighing up of costs and benefits and trying to maximise the surplus of benefits over costs. This surplus will be maximised when people do more of things where the marginal benefit exceeds the marginal cost and less of things where the marginal cost exceeds the marginal benefit. But, of course, measuring benefits and costs is not always easy. Nevertheless, for much of the time we do make conscious choices where we consider that choosing to do something is ‘worth it’: i.e. that the benefit to us exceeds the cost.
When we make a choice, often this involves expenditure. For example, when we choose to buy an item in a shop, we spend money on the item, and also, perhaps, spend money on transport to get us to the shop. But the full opportunity cost includes not only the money we spend, but also the best alternative activity sacrificed while we are out shopping.
Then there are the benefits. Not all pleasurable activity costs us money. The sight of beautiful contryside or the pleasure of the company of friends may cost us very little, if anything, in money terms. But they may still be very valuable to us.
If we are to make optimal decisions we need to have some estimate of all costs and benefits, not just ones involving the payment or receipt of money. This applies both to individual behaviour and to collective decisions made by governments or other agencies.
Cost–benefit analysis seeks to do this to help decisions about new projects, such as a new road, a new hospital, environmental projects, and so on. But just how do we set about putting a value on the environment – on the pleasure of a walk in bluebell woods, on protecting bird life in wetlands or sustaining ecosystems?
For the first time there has been a major study that attempts to value the environment. According to the introduction to the report:
The UK National Ecosystem Assessment (UK NEA) is the first analysis of the UK’s natural environment in terms of the benefits it provides to society and the nation’s continuing prosperity. Carried out between mid-2009 and mid-2011, the UK NEA has been a wide-ranging, multi-stakeholder, cross-disciplinary process, designed to provide a comprehensive picture of past, present and possible future trends in ecosystem services and their values; it is underpinned by the best available evidence and the most up-to-date conceptual thinking and analytical tools. The UK NEA is innovative in scale, scope and methodology, and has involved more than 500 natural scientists, economists, social scientists and other stakeholders from government, academic and private sector institutions, and non-governmental organisations (NGOs).
The following podcast and webcast look at the report and at some of the issues it raises in terms of quantifying and incorporating environmental costs and benefits into decision taking.
Podcast and Webcast
‘The hidden value’ of our green spaces BBC Today Programme, Tom Feilden (2/6/11)
Report puts monetary value on Britain’s natural assets BBC News, Jeremy Cooke (2/6/11)
Articles
NEA report highlights need for biodiversity Farmers Guardian, Ben Briggs (2/6/11)
Nature is worth £19bn a year to the UK economy – report Energy & Environmental Management Magazine (2/6/11)
In praise of… the unquantifiable Guardian (3/6/11)
Priceless benefits of bluebell woods Guardian letters, Dr Bhaskar Vira and Professor Roy Haines-Young (4/6/11)
Nature ‘is worth billions’ to UK BBC News, Richard Black (2/6/11)
Putting a price on nature BBC News, Tom Feilden (2/6/11)
Value of Britain’s trees and waterways calculated in ‘ground-breaking’ study The Telegraph, Andy Bloxham (2/6/11)
Nature worth billions, says environment audit Financial Times, Clive Cookson (2/6/11)
Nature gives UK free services worth billions Planet Earth, Tom Marshall (3/6/11)
UK scientists put price on nature with National Ecosystem Assessment GreenWise, Ann Elise Taylor (2/6/11)
Report
UK National Ecosystem Assessment: link to report DEFRA
UK National Ecosystem Assessment (June 2011)
The UK National Ecosystem Assessment: Synthesis of the Key Findings
Questions
- How would you set about valuing the benefits of woodlands?
- According to the report, the health benefits of living close to a green space are worth up to £300 per person per year. How much credance sould we attach to such a figure?
- What do you understand by the ‘ecosystem approach’ and the term ‘ecosystem services’?
- Explain Figure 2 on page 3 of Chapter 2 of the report.
- Should decision makers quantify only those benefits of ecosystems experienced by humans? Would all environmentalists agree with this approach?
- What are the advantages and disadvantages of quantifying all costs and benefits in money terms?
- Compare the consequences over the next 50 years of a ‘world markets’ scenarios with that of a ‘nature at work’ scenario.
- What policy implications follow from the report?
The world’s population is set to go on rising – at least to 2050. And as population rises, so will the demand for food. But here we come up against a potentially catastrophic illustration of the law of diminishing returns. Population is set to grow, but the world supply of land is pretty well fixed. And with global warming, some land may become unusable.
According to Sir John Beddington, an expert in population biology and lead author of a government-commissioned report, The Future of Food and Farming, there could be serious consequences of this population rise, including rapid rises in the demand for food, rising food prices, rising land prices, the degradation of land, growing food poverty in many developing countries, growing political unrest and serious environmental damage. As the report’s Executive Summary states:
The global food system will experience an unprecedented confluence of pressures over the next 40 years. On the demand side, global population size will increase from nearly seven billion today to eight billion by 2030, and probably to over nine billion by 2050; many people are likely to be wealthier, creating demand for a more varied, high-quality diet requiring additional resources to produce. On the production side, competition for land, water and energy will intensify, while the effects of climate change will become increasingly apparent. The need to reduce greenhouse gas emissions and adapt to a changing climate will become imperative. Over this period globalisation will continue, exposing the food system to novel economic and political pressures.
Any one of these pressures (‘drivers of change’) would present substantial challenges to food security; together they constitute a major threat that requires a strategic reappraisal of how the world is fed.
The report specifically looks at five key challenges for the future:
A. Balancing future demand and supply sustainably – to ensure that food supplies are affordable.
B. Ensuring that there is adequate stability in food prices – and protecting the most vulnerable from the volatility that does occur.
C. Achieving global access to food and ending hunger – this recognises that producing enough food in the world so that everyone can potentially be fed is not the same thing as ensuring food security for all.
D. Managing the contribution of the food system to the mitigation of climate change.
E. Maintaining biodiversity and ecosystem services while feeding the world.
So what can be done and how realistic are the policy solutions? The following broadcasts and articles examine the arguments
Webcasts and podcasts
Articles
Report
Questions
- Summarise the main findings of the report.
- Does increasing the output of food per agricultural worker contradict the law of diminishing returns? Explain.
- What are the current failings of the system of global food supply?
- Why are problems of food supply likely to intensify?
- What externalities are involved in global food production? What impact do these have?
- In what ways might the externalities be internalised?
- What are the benefits and dangers of new technologies as means of increasing food supply?
- To what extent do the goals of increasing food supply and environmental sustainability conflict with each other?
- Explain the main drivers of change that affect food supply and demand? In what ways do these drivers interact with each other?
- “Although the challenges are enormous there are real grounds for optimism.” Explain the report’s authors’ thinking here.
A two-week international climate change summit opened in Cancún, Mexico, on 29 November. But will the talks make any progress in tackling global warming? Will mechanisms be put in place to ensure that the previously agreed ceiling of 2°C warming is met?
After the largely unsuccessfuly talks in Copenhagen a year ago, hopes are not high. But a likely rise in global temperatures of considerably more than 2°C could have disasterous global consequences. Indeed, new evidence suggests that even a ceiling of 2°C may be too high and that, as temperatures rise towards that level, domino effects will start that may become virtually unstoppable. As Andrew Sims in the Guardian article notes:
This is the problem. Once the planet warms to the point where environmental changes that further add to warming feed off each other, it becomes almost meaningless to specify just how much warmer the planet may get. You’ve toppled the first domino and it becomes virtually impossible to stop the following chain of events. Honestly, nobody really knows exactly where that will end, but they do know it will end very, very badly.
The following podcasts and articles look at the importance of reaching international agreement but the difficulties of doing so.
Podcasts and webcasts
Post-Copenhagen, a Cancun compromise? Reuters (30/11/10)
Climate change ‘Dragons’ Den’: What are the options? BBC News, Roger Harrabin (29/11/10)
Cancun climate change summit seeks new emissions deal BBC News, David Shukman (3/12/10)
Can nudge theory change our habits? BBC News, Claudia Hammond (29/11/10)
Articles
Cancún climate change conference 2010 Guardian, (portal)
Q&A: Cancún COP16 climate talks Guardian, Shiona Tregaskis (8/10/10)
72 months and counting … Guardian, Andrew Simms (1/12/10)
Cancún climate talks: In search of the holy grail of climate change policy Guardian, Michael Jacobs (29/11/10)
Cancún and the new economics of climate change Guardian, Kevin Gallagher and Frank Ackerman (30/11/10)
Facing the consequences The Economist (25/11/10)
UN climate talks low on expectation BBC News, Richard Black (29/11/10)
Expect little from Cancun talks The Star (Malaysia), Martin Khor (29/11/10)
Don’t let us down: UN climate change talks in Cancun Independent, Jonathan Owen and Matt Chorley (28/11/10)
Cancun and Climate: Government Won’t Act, But Business Will Time Magazine: The Curious Capitalist, Zachary Karabell (28/11/10)
At Global Climate Change Talks, an Answer Grows Right Outside Huffington Post, Luis Ubiñas (29/11/10)
Cancun climate change talks: ‘last chance’ in the snakepit The Telegraph, Geoffrey Lean (29/11/10)
Climate Change Talks Must Deliver After Record Weather Year Scoop (New Zealand), Oxfam (29/11/10)
World climate talks kick off in Cancun DW-World, Amanda Price and Axel Rowohlt (29/11/10)
On international equity weights and national decision making on climate change Vox, David Anthoff and Richard S J Tol (29/11/10)
Climate treaties all bluster, no bite The Age, Dan Cass (10/12/10)
Conference website
UNFCCC COP16/CMP6: Mexico 2010 Official site
Questions
- What would count as a ‘successful’ outcome of the climate change talks? Why might politicians interpret this differently from economists?
- What can governments do to internalise the externalities of greenhouse gas emissions?
- What insights can game theory provide into the difficulties of reaching binding climate change agreements?
- What are likely to be the most effective mechanisms for getting people to adapt their behaviour?
- Can nudge theory be used to change our habits towards the environment?
- Explain the use of equity weights in judging the effects of climate change. Are they a practical way forward in devising environmental policy?
You might think that small environmentally-friendly companies would be moving into the green energy market: that setting up a wind farm, for example, would be a perfect business opportunity for a small company. In fact, the big companies are taking over this market. As the Der Spiegel article below states:
Europe’s wind energy sector is currently experiencing a major transformation. New massive offshore wind parks are soon expected to crop up off Europe’s coastline. Big companies like Siemens and General Electrics are increasing their stakes in a market worth billions. But experts warn that a new energy oligopoly may soon emerge.
So what is it about the wind energy market that makes it suitable for an oligopoly to develop? The two articles explore this question.
Winds of Change Der Spiegel, Nils-Viktor Sorge (1/11/10)
GE and Siemens Outpacing Wind Pioneers, Becoming Clean Energy’s “New Oligopoly” Fast Company, David Zax (2/11/10)
Questions
- What market failures are there in the wind energy market?
- What barriers to entry are there in the wind energy market?
- What economies of scale are there in this market?
- How are changes in this market affecting the minimum efficient scale of companies?
- Would there be room in the market for enough competitors to prevent collusion?
- How might the authorities prevent (a) open and (b) tacit collusion in the wind energy market?
- Do small wind energy companies have any market advantages?
Student fees are set to rise to between £6000 and £9000 per year from 2012 (see Will students be Browned off?. But I’m sure you know that already! Not surprisingly, there has been considerable debate about the effects on student debt and whether potential students will be put off from applying to university. But there is another issue, explored in the article below. This is the question of the ‘marketisation’ of higher education.
With the exception of the STEM subjects (science, technology, engineering and maths) universities will no longer receive any teaching subsidy from the government. Teaching will have to be funded from student fees. This means that provision will depend on supply and demand. If there is a high demand for certain courses, then the courses will be financially viable for universities. If not, they will have to close (unless the university chooses to cross-subsidise them from other profitable courses).
This might be fine if the market for university places were perfectly competitive and if questions of inequality of access were fully taken into account. But the higher education market is not perfect. The article looks at some of these imperfections and why, therefore, a pure market system will fail to achieve the optimum allocation of university places.
Browne’s Gamble London Review of Books, Stefan Collini (4/11/10)
Questions
- What information failures are there in the market for higher education places?
- What externalities are involved in higher education and will this lead to an over or underprovision of higher education in a pure market system?
- Apart from externalities and information asymmetries, what other market failures apply to the market for student places in HE?
- What are the arguments for subsidising non-STEM subjects (as well as STEM ones)? Should these subsidies vary from course to course and from university to university?
- What is the best way of tackling the problem of unequal access to higher education?