When an industry produces positive externalities, there is an argument for granting subsidies. To achieve the socially efficient output in an otherwise competitive market, the marginal subsidy should be equal to the marginal externality. This is the main argument for subsidising wind power. It helps in the switch to renewable energy away from fossil fuels. There is also the secondary argument that subsidies help encourage the development of technologies that would be too uncertain to fund at market rates.
If subsidies are to be granted, it is important that they are carefully designed. Not only does their rate need to reflect the size of the positive externalities, but also they should not entail any perverse incentive effects. But this is the claim about subsidies given to wind turbines: that they create an undesirable side effect.
Small-scale operators are encouraged to build small turbines by offering them a higher subsidy per kilowatt generated (through higher ‘feed-in’ tariffs). But according to a report by the Institute for Public Policy Research (IPPR), this is encouraging builders and operators of large turbines to ‘derate’ them. This involves operating them below capacity in order to get the higher tariff. As the IPPR overview states:
The scheme is designed to support small-scale providers, but the practice of under-reporting or ‘derating’ turbines’ generating capacity to earn a higher subsidy is costing the taxpayer dearly and undermining the competitiveness of Britain’s clean energy sector.
The loophole sees developers installing ‘derated’ turbines – that is, turbines which are ‘capped’ so that they generate less energy. Turbines are derated in this way so that developers and investors are able to qualify for the more generous subsidy offered to lower-capacity turbines, generating 100–500kW. 
By installing derated turbines, developers are making larger profits off a feature of the scheme that was designed to support small-scale projects. Currently, the rating of a turbine is declared by the manufacturer and installer, resulting in a lack of external scrutiny of the system.
The subsidies are funded by consumers through higher electricity prices. As much as £400 million could be paid in excess subsidies. The lack of scrutiny means that operators could be receiving as much as £100 000 per year per turbine in excess subsidies.
However, as the articles below make clear, the facts are disputed by the wind industry body, RenewableUK. Nevertheless, the report is likely to stimulate debate and hopefully a closing of the loophole.
Video
Turbine power: the cost of wind power to taxpayers Channel 4 News, Tom Clarke (10/2/15)
Articles
Wind subsidy loophole boosts spread of bigger turbines Financial Times, Pilita Clark (10/2/15)
Call to Close Wind Power ‘Loophole’ Herald Scotland, Emily Beament (10/2/15)
Wind farm developers hit back at ‘excessive subsidy’ claims Business Green, Will Nichols (10/2/15)
The £400million feed-in frenzy: Green energy firms accused of making wind turbines LESS efficient so they appear weak enough to win small business fund Mail Online, Ben Spencer (10/2/15)
Wind power subsidy ‘loophole’ identified by new report Engineering Technology Magazine, Jonathan Wilson (11/2/15)
Report
Feed-in Frenzy Institute for Public Policy Research, Joss Garman and Charles Ogilvie (February 2015)
Questions
- Draw a diagram to demonstrate the optimum marginal rate of a subsidy and the effect of the subsidy on output.
- Who should pay for subsidies: consumers, the government (i.e. taxpayers generally), electricity companies through taxes on profits made from electricity generation using fossil fuels, some other source? Explain your thinking.
- What is the argument for giving a higher subsidy to operators of small wind turbines?
- If wind power is to be subsidised, is it better to subsidise each unit of output of electricity, or the construction of wind turbines or both? Explain.
- What could Ofgem do (or the government require Ofgem to do) to improve the regulation of the wind turbine industry?
Economics is about choices. But how can people be persuaded to make healthy choices, or socially responsible or environmentally friendly choices? Behavioural economists have studied how people can be ‘nudged’ into changing their behaviour. One version of nudge theory is ‘fun theory’. This studies how people can be persuaded into doing desirable things by making it fun to do so.
I came across the first video below a couple of days ago. It looks at a highly successful experiment at the Odenplan underground station in Stockholm to persuade people to make the healthy choice of using the stairs rather than the escalator. It made doing so fun. The stairs were turned into a musical keyboard, complete with sound. Each stair plays a piano note corresponding to its piano key each time someone treads on it. As you go up the stairs you play an ascending scale.
After installing the musical staircase, 66% more people than normal chose the stairs over the escalator.
The fun theory initiative is sponsored by Volkswagen. The Fun Theory website is ‘dedicated to the thought that something as simple as fun is the easiest way to change people’s behaviour for the better. Be it for yourself, for the environment, or for something entirely different, the only thing that matters is that it’s change for the better.’
VW held a competition in 2009 to encourage people to invent fun products designed to change people’s behaviour. There were over 700 entries and you can see them listed on the site. The 13 finalists included the musical staircase, traffic lights with quiz questions on the red, a Connect Four beer crate, fun tram tickets (giving entry to an instant-win lottery), a pinball exercise machine, a speed camera lottery where a winner is chosen from those abiding by the speed limit, a jukebox rubbish bin (which plays when people add rubbish), a one-armed vending machine, a fun doormat, car safety belts linked to a car’s entertainment system, car safety belt with a gaming screen which turns on when buckled, a bottle bank arcade system and the world’s deepest bin (or at least one which sounds as if it is). The winner was the speed camera lottery.
The fun theory site
Thefuntheory.com
Fun theory videos
Piano Staircase – Odenplan, Stockholm (on Vimeo)
The Speed Camera Lottery (on VIMP.com, Kevin Richardson)
Garbage Jukebox (on YouTube)
The World’s Deepest Bin (on Vimeo)
Bottle Bank Arcade (on YouTube)
Questions
- Does fun theory rely on rational choices?
- Other than through having fun, how else may people be nudged into changing their behaviour?
- Go through some of the entries to the Fun Theory Award and choose three that you particularly like. Explain why.
- Invent your own fun theory product. You might do this by discussing it groups and perhaps having a group competition.
In his 1971 book, Income Distribution, Jan Pen, a Dutch economist, gave a graphic illustration of inequality in the UK. He described a parade of people marching by. They represent the whole population and the parade takes exactly one hour to pass by. The height of each person represents his or her income. People of average height are the people with average incomes – the observer is of average height. The parade starts with the people on the lowest incomes (the dwarfs), and finishes with those on the highest incomes (the giants).
Because income distribution is unequal, there are many tiny people. Indeed, for the first few minutes of the parade, the marchers are so small they can barely be seen. Even after half an hour, when people on median income pass by, they are barely waist high to the observer.
The height is growing with tantalising slowness, and forty-five minutes have gone by before we see people of our own size arriving. To be somewhat more exact: about twelve minutes before the end the average income recipients pass by.
In the final minutes, giants march past and then in the final seconds:
the scene is dominated by colossal figures: people like tower flats. Most of them prove to be businessmen, managers of large firms and holders of many directorships and also film stars and a few members of the Royal Family.
The rear of the parade is brought up by a few participants who are measured in miles. Indeed they are figures whose height we cannot even estimate: their heads disappear into the clouds and probably they themselves do not even know how tall they are.
Pen’s description could be applied to most countries – some with even more dwarfs and even fewer but taller giants. Generally, over the 43 years since the book was published, countries have become less equal: the giants have become taller and the dwarfs have become smaller.
The 2011 Economist article, linked below, uses changes in Gini coefficients to illustrate the rise in income inequality. A Gini coefficient shows the area between the Lorenz curve and the 45° line. The figure will be between 0 and 1 (or 0% and 100%). a figure of 0 shows total equality; a figure of 1 shows a situation of total inequality, where one person earns all the nation’s income. The higher the figure, the greater the inequality.
The chart opposite shows changes in the Gini coefficient in the UK (see Table 27 in the ONS link below for an Excel file of the chart). As this chart and the blog post Rich and poor in the UK show, inequality rose rapidly during the years of the 1979–91 Thatcher government, and especially in the years 1982–90. This was associated with cuts in the top rate of income tax and business deregulation. It fell in the recession of the early 1990s as the rich were affected more than the poor, but rose with the recovery of the mid- to late 1990s. It fell again in the early 2000s as tax credits helped the poor. It fell again following the financial crisis as, once more, the rich were affected proportionately more than the poor.
The most up-to-date international data for OECD countries can be found on the OECD’s StatExtracts site (see chart opposite: click here for a PowerPoint). The most unequal developed county is the USA, with a Gini coefficient of 0.389 in 2012 (see The end of the American dream?), and US inequality is rising. Today, the top 1% of the US population earns some 24% of national income. This compares with just 9% of national income in 1976.
Many developing countries are even less equal. Turkey has a Gini coefficient of 0.412 and Mexico of 0.482. The figure for South Africa is over 0.6.
When it comes to wealth, distribution is even less equal. The infographic, linked below, illustrates the position today in the USA. It divides the country into 100 equal-sized groups and shows that the top 1% of the population has over 40% of the nation’s wealth, whereas the bottom 80% has only 7%.
So is this inequality of income and wealth desirable? Differences in wages and salaries provide an incentive for people to work harder or more effectively and to gain better qualifications. The possibility of increased wealth provides an incentive for people to invest.
But are the extreme differences in wealth and income found in many countries today necessary to incentivise people to work, train and invest? Could sufficient incentives exist in more equal societies? Are inequalities in part, or even largely, the result of market imperfections and especially of economic power, where those with power and influence are able to use it to increase their own incomes and wealth?
Could it even be the case that excessive inequality actually reduces growth? Are the huge giants that exist today accumulating too much financial wealth and creating too little productive potential? Are they spending too little and thus dampening aggregate demand? These arguments are considered in some of the articles below. Perhaps, by paying a living wage to the ‘tiny’ people on low incomes, productivity could be improved and demand could be stimulated.
Infographic
Wealth Inequality in America YouTube, Politizane (20/11/12)
Articles
The rise and rise of the cognitive elite The Economist (20/1/11)
Inequality in America: Gini in the bottle The Economist (26/11/13)
Pen’s Parade: do you realize we’re mostly dwarves? LVTFan’s Blog (21/2/11)
Here Are The Most Unequal Countries In The World Business Insider, Andy Kiersz (8/11/14)
Inequality in the World Dollars & Sense, Arthur MacEwan (Nov/Dec 14)
Britain is scared to face the real issue – it’s all about inequality The Observer, Will Hutton (19/1/14)
The tame inequality debate FundWeb, Daniel Ben-Ami (Nov 14)
Is inequality the enemy of growth? BBC News, Robert Peston (6/10/14)
Data
GINI index World Bank data
List of countries by income equality Wikipedia
The Effects of Taxes and Benefits on Household Income, 2012/13 ONS (see table 27)
Income Distribution and Poverty: Gini (disposale income) OECD StatExtract
Questions
- Distinguish between income and wealth. Is each one a stock or a flow?
- Explain how (a) a Lorenz curve and (b) a Gini coefficient are derived.
- What other means are there of measuring inequality of income and wealth other than using Gini coefficients (and giants and dwarfs!)?
- Why has inequality been rising in many countries over the years?
- How do (a) periods of rapid economic growth and (b) recessions affect income distribution?
- Define ‘efficiency wages’. How might an increase in wages to people on low incomes result in increased productivity?
- What is the relationship between the degree of inequality and household debt? What implications might this have for long-term economic growth and future financial crises? Is inequality the ‘enemy of growth’?
There have been two significant changes in prices for travel in Bristol. At the end of April, the toll on Brunel’s iconic Clifton Suspension Bridge doubled from 50p to £1 for a single crossing by car. The bridge over the Avon Gorge links North Somerset with the Clifton area of Bristol and is a major access route to the north west of the city. Avoiding the bridge could add around 2 miles or 8 minutes to a journey from North Somerset to Clifton.
The justification given by the Clifton Suspension Bridge Trust for the increase was that extra revenue was needed for maintenance and repair. As Trust Chairman Chris Booy said, ‘The higher toll will enable the Trust to continue its £9 million 10-year vital repair and maintenance programme which aims to secure the bridge’s long-term future as a key traffic route, one of Bristol’s major tourist destinations and the icon of the city’.
The other price change has been downwards. In November 2013, the First Group cut bus fares in Bristol and surrounding areas. Single fares for up to three miles were cut from £2.90 to £1.50; 30% discounts were introduced for those aged 16 to 21; half-price tickets were introduced for children from 5 to 15; and the two fare zones for £4 and £6 day tickets were substantially increased in size.
First hoped that the anticipated increase in passengers would lead to an increase in revenue. Evidence so far is that passenger numbers have increased, with journeys rising by some 15%. Part of this is due to other factors, such as extra bus services, new buses, free wifi and refurbished bus stops with larger shelters and seats. But the company attributes a 9% rise in passengers to the fare
reductions. As far as revenue is concerned, indications from the company are that, after an initial fall, revenue has risen back to levels earned before the fare reduction.
What are the longer-term implications for revenue and profit of these two decisions? This depends on the price elasticity of demand and on changes in costs. Read the articles and then consider the implications by having a go at answering the questions.
Clifton Suspension Bridge toll to rise from 50p to £1 BBC News (9/4/14)
Regular Users of Clifton Suspension Bridge will be Protected from the Increase in the Bridge Toll Clifton Suspension Bridge (9/4/14)
Clifton Suspension Bridge Review Decision Letter Department of Transport (24/3/14)
Clifton Suspension Bridge Trust: bridge toll review inspector’s report Department of Transport (8/4/14)
Clifton Suspension Bridge Toll Increase – Account of the May 2013 Public Inquiry The National Alliance Against Tolls (NAAT)
First Bus Bristol fare cuts sees passenger growth BBC News (6/6/14)
First gamble over cheaper bus fares pays off as passengers increase in Bristol The Bristol Post (6/6/14)
Bristol bus fares deal to extend to South Gloucestershire and North Somerset The Bristol Post, Gavin Thompson (12/6/14)
Questions
- What assumptions is the Clifton Suspension Bridge Trust making about the price elasticity of demand for bridge crossings?
- What determines the price elasticity for bridge crossings in general? Why is this likely to differ from one bridge to another?
- How is the long-term price elasticity of demand likely to differ from the short-term elasticity for Clifton Suspension Bridge crossings and what implications will this have for revenues, costs and profit?
- How is the price elasticity of demand for the bridge likely to vary from one user to another?
- How is offering substantial price reductions for multiple-crossing cards likely to affect revenue?
- What determines the price elasticity of demand for bus travel?
- What could a local council do to encourage people to use buses?
- How is the long-term price elasticity of demand for bus travel likely to differ from the short-term elasticity?
- In the long run, is First likely to see profits increase from its fare reduction policy? Explain what will determine this likelihood.
Growing inequality of income and wealth is a common pattern throughout the world. In the boom years up to 2008, the rich got a lot richer, but at least those on low incomes generally saw modest rises in their incomes. Since 2008, however, the continually widening gap between rich and poor has seen the poor and many on middle incomes getting absolutely poorer.
The problem is particularly acute in the USA. Indeed, in his 2012 State of the Union address, President Obama said that it was the ‘defining issue of our time.’
No challenge is more urgent. No debate is more important. We can either settle for a country where a shrinking number of people do really well, while a growing number of Americans barely get by. Or we can restore an economy where everyone gets a fair shot, everyone does their fair share, and everyone plays by the same set of rules.
The good news for the poor in the USA is that at last their incomes have stopped falling, thanks to stronger economic growth. But their share of the growth in GDP is tiny.
As The Economist article states:
The main message is a grim one. Most of the growth is going to an extraordinarily small share of the population: 95% of the gains from the recovery have gone to the richest 1% of people, whose share of overall income is once again close to its highest level in a century. The most unequal country in the rich world is thus becoming even more so.
Apart from the ethical question of whether it is desirable for a society, already highly unequal, to become even more so, there is the question of whether this growth in inequality threatens economic recovery. Joseph Stiglitz argues that the rich have a low marginal propensity to consume and that this is threatening recovery.
Then there is the question of investment. Because most Americans have not seen any significant rise in incomes, it is easy for them to believe that the country cannot afford to invest more. And certainly it is difficult to persuade people that higher taxes are warranted to fund education, infrastructure or research.
The following articles consider the problem and its implications and look at various policy alternatives.
Articles and videos
Inequality: Growing apart The Economist (21/9/13)
What is income inequality, anyway? CNN, John D. Sutter (29/10/13)
Inequality is literally killing America Press TV (22/11/13)
It’s Economic Inequality Stupid – What to Do About the Biggest Crisis Facing America Huffington Post, Robert Creamer (14/11/13)
US Inequality Now Literally Off the Chart Truthout, Salvatore Babones (8/6/13)
Inequality moves to the front line of US politics Financial Times, Richard McGregor (20/11/13)
Is wealth inequality slowing growth? BBC News, Linda Yueh (21/11/13)
American Inequality in Six Charts The New Yorker, John Cassidy (18/11/13)
Income Inequality ‘Profoundly Corrosive’ Wall Street Journal, Larry Summers (19/11/13)
21 Charts On US Inequality That Everyone Should See Business Insider, Gus Lubin (12/11/13)
Data, information and reports
Income inequality in the United States Wikipedia
Inequality Data & Statistics Inequality.org
Income Main United States Census Bureau
World of Work Report 2013: Snapshot of the United States ILO
World of Work Report 2013 ILO
StatExtracts OECD (Search for Gini)
Questions
- How may income inequality be measured?
- Comment on the Gini coefficients in the above link to the StatExtracts site.
- Why has inequality grown in the USA?
- The Swiss have just voted in a referendum to reject a proposal to limit executive pay to 12 times that of the lowest paid worker in the same company. What are the arguments for and against the proposal?
- What features of an unequal society tend to perpetuate or even deepen that inequality over time?
- What features of a well functioning market economy would help to reduce income inequality?
- Are higher marginal tax rates and higher welfare payments the best way of reducing inequality? What other policy options are there?
- Compare the views of Paul Krugman and Joseph Stiglitz on the effects of growing inequality on economic growth. How significant is the difference in the marginal propensity to consume of the rich and the poor in explaining the relatively low rate of US economic growth?
When an industry produces positive externalities, there is an argument for granting subsidies. To achieve the socially efficient output in an otherwise competitive market, the marginal subsidy should be equal to the marginal externality. This is the main argument for subsidising wind power. It helps in the switch to renewable energy away from fossil fuels. There is also the secondary argument that subsidies help encourage the development of technologies that would be too uncertain to fund at market rates.
