Tag: price elasticity of demand

Oil prices have been rising in recent weeks. With Brent crude currently at around $85 per barrel, some commentators are predicting the price could reach $100. At the beginning of the year, the price was $67 per barrel; in June last year it was $44. In January 2016, it reached a low of $26. But what has caused the price to increase?

On the demand side, the world economy has been growing relatively strongly. Over the past three years, global growth has averaged 3.5%. This has helped to offset the effects of more energy efficient technologies and the gradual shift away from oil to alternative sources of energy.

On the supply side, there have been growing constraints.

The predicted resurgence of shale oil production, after falls in both output and investment when oil prices were low in 2016, has failed to materialise as much as expected. The reason is that pipeline capacity is limited and there is very little scope for transporting more oil from the major US producing area – the Permian basin in West Texas and SE New Mexico. There are similar pipeline capacity constraints from Canadian shale fields. The problem is compounded by shortages of labour and various inputs.

But perhaps the most serious supply-side issue is the renewed sanctions on Iranian oil exports imposed by the Trump administration, due to come into force on 4 November. The USA is also putting pressure on other countries not to buy Iranian oil. Iran is the world’s third largest oil exporter.

Also, there has been continuing turmoil in the Venezuelan economy, where inflation is currently around 500 000 per cent and is expected to reach 1 million per cent by the end of the year. Consequently, the country’s oil output is down. Production has fallen by more than a third since 2016. Venezuela was the world’s third largest oil producer.

Winners and losers from high oil prices

The main gainers from high oil prices are the oil producing countries, such as Russia and Saudi Arabia. It will also encourage investment in oil exploration and new oil wells, and could help countries, such as Colombia, with potential that is considered underexploited. However, given that the main problem is a lack of supply, rather than a surge in demand, the gains will be more limited for those countries, such as the USA and Canada, suffering from supply constraints. Clearly there will be no gain for Iran.

In terms of losers, higher oil prices are likely to dampen global growth. If the oil price reaches $100 per barrel, global growth could be around 0.2 percentage points lower than had previously been forecast. In its latest World Economic Outlook, published on 8 October, the IMF has already downgraded its forecast growth for 2018 and 2019 to 3.7% from the 3.9% it forecast six months ago – and this forecast is based on the assumption that oil prices will be $69.38 a barrel in 2018 and $68.76 a barrel in 2019.

Clearly, the negative effect will be greater, the larger a country’s imports are as a percentage of its GDP. Countries that are particularly vulnerable to higher oil prices are the eurozone, Japan, China, India and most other Asian economies. Lower growth in these countries could have significant knock-on effects on other countries.

Consumers in advanced oil-importing countries would face higher fuel costs, accounting for an additional 0.3 per cent of household spending. Inflation could rise by as much as 1 percentage point.

The size of the effects depends on just how much oil prices rise and for how long. This depends on various demand- and supply-side factors, not least of which in the short term is speculation. Crucially, global political events, and especially US policies, will be the major driving factor in what happens.

Articles

Data

Questions

  1. Draw a supply and demand diagram to illustrate what has been happening to oil prices in the past few weeks and what is likely to happen in the coming weeks.
  2. What is the significance of the price elasticity of demand and supply in determining the size of oil price increase?
  3. What determines (a) the price elasticity of demand for oil; (b) the income elasticity of demand for oil; (c) the price elasticity of supply of oil?
  4. Why might oil prices overshoot the equilibrium price that reflects changed demand and supply conditions?
  5. Use demand and supply diagrams to illustrate (a) the destabilising effects that speculation could have on oil prices; (b) a stabilising effect.
  6. What industries might gain from higher oil prices and why?
  7. What would OPEC’s best policy be in the current circumstances? Explain.

In 2012, the Scottish Parliament voted to introduce a minimum unit price for alcoholic drinks. The Scotch Whisky Association along with others appealed against the legislation, but on 15 November 2017 the UK Supreme Court ruled unanimously that the legislation does not breach European Union law. It is thus likely that, after consultation, a 50p minimum unit price will be introduced, making Scotland the first country in the world to introduce minimum pricing for alcohol.

As we saw in a previous blog, Alcohol minimum price, the aim is to prevent the sale of really cheap drinks in supermarkets and other outlets. For example, three-litre bottles of strong cider can be sold for as little as £3.59. Sometimes supermarkets offer multibuys which are heavily discounted. The idea of minimum pricing is to stop these practices without affecting ‘normal’ prices. For example, the legislation will not affect prices in pubs, which are already more than 50p per unit of alcohol.

The following table shows how much prices would rise for various types of drink when compared to current cheap supermarket prices. The biggest percentage effect is for cheap, strong cider and beer.

Strength Size Units of alcohol Current price New minimum price
Cheap strong cider 7.5% 3 litres 22.5 £3.50 £11.25
Cheap wine 13% 750ml 9.75 £3.99 £4.88
Cheap beer/lager (normal) 4% 4 × 440ml 7.04 £2.50 £3.52
Cheap beer/lager (strong) 8% 4 × 500ml 16 £3.50 £8.00
Cheap spirits 37.5% 70cl 26.25 £10.00 £13.13
Cheap strong spirits 50% 70cl 35 £12.00 £17.50

The hope is that by preventing the sale of really cheap drinks in supermarkets, people will no longer be encouraged to ‘pre-load’, so that when they go out for the evening they are already drunk. It would also help to reduce the number of alcoholics amongst the poor.

But this raises the question of equity. By targeting cheap drink, the policy is likely to hit the poor hardest. The question is whether this will simply lead to alcoholics on low incomes cutting down on other things, such as food and clothing for themselves and their children.

How successful, then, will such a policy be in cutting down drunkenness and the associated anti-social behaviour in many Scottish towns and cities, especially on Friday and Saturday nights? This will depend on the price elasticity of demand.

Videos and podcasts

Scotland first country to introduce minimum alcohol price Channel 4 News, Fatima Manji (15/11/17)
The story of how Scotland brought in minimum pricing on alcoh The Scotsman, Ross McCafferty (15/11/17)
Supreme Court rejects challenge against plans for minimum alcohol pricing in Scotland ITV News, Peter Smith (15/11/17)
Scotland getting the all-clear for minimum alcohol pricing as judges reject appeal Heart Scotland News, Connor Gillies (15/11/17)

Articles

Alcohol minimum unit pricing to go ahead Scottish Government: news (15/11/17)
Scottish alcohol price survey 2016 Alcohol Focus Scotland (2016)
Minimum pricing Alcohol Focus Scotland (2017)
Supreme Court backs Scottish minimum alcohol pricing BBC News (15/11/17)
Supreme Court backs Scottish minimum alcohol pricing plans Out-Law.com (15/11/17)
Go-ahead for minimum alcohol pricing British Medical Association (BMA), Jennifer Trueland (15/11/17)
Expert reaction to UK supreme court ruling that the Scottish government can set a minimum price for alcohol, rejecting a challenge by the Scotch Whisky Association Science Media Centre (15/11/17)
Scotland to become first country with minimum price for alcohol sales Independent, Alex Matthews-King (15/11/17)
Scotland leading the world over minimum alcohol price ITV News (15/11/17)
Campaigners urge minimum alcohol price in England after Scottish ruling The Guardian, Severin Carrell (15/11/17)
Scottish ‘booze cruises’ to England predicted as minimum pricing introduced The Telegraph, Olivia Rudgard (15/11/17)

Questions

  1. Draw a diagram to illustrate the effect of a minimum price per unit of alcohol on (a) cheap cider; (b) good quality wine.
  2. What would be the likely effects of a 50p per unit minimum price on the pub trade?
  3. How is the price elasticity of demand for alcoholic drinks relevant to determining the success of minimum pricing?
  4. What determines the price elasticity of demand for cheap alcoholic drinks?
  5. Compare the effects on alcohol consumption of imposing a minimum unit price of alcohol with raising the duty on alcoholic drinks. What are the revenue implications of the two policies for the government?
  6. What externalities are involved in the consumption of alcohol? How could a socially efficient price for alcohol be determined?
  7. Could alcohol consumption be described as a ‘de-merit good’? Explain.
  8. Other than high minimum prices and taxation, what other policies could be used to (a) tackle binge drinking; (b) tackle the problem of alcoholism?
  9. What will determine the number of people travelling from Scotland to England to buy cheaper alcoholic drinks?

Food prices often rise or fall with good or bad harvests or because of a change in demand. A recent example is the price of brazil nuts, which by May this year had risen over 60% on European markets.

Part of the reason for the price rise has been on the demand side. Consumption of brazil nuts has increased as more people switch to healthier diets. This includes the purchase of the nuts themselves and as part of healthier snack foods. With supply being relatively inelastic, any rise in demand tends to have a relatively large effect on price.

A more acute reason is on the supply side. There has been a very poor harvest of brazil nuts. The nuts are grown largely in the Amazon basin which has been hit by drought linked to the El Niño effect. This, however, is only a temporary effect and future harvests should increase again as rainfall returns to normal. However, in the longer term, rainfall patterns may change with the effects of global warming.

The price rise in the UK has also be aggravated by the depreciation of the pound since the Brexit vote, which has fallen some 13% against the dollar since June 2016. A rise in the dollar price of brazil nuts has thus led to an even bigger rise in their sterling price.

Articles

Brazil nuts are rocketing in price – here’s why The Conversation, Iain Fraser (24/10/17)
Brazil nut prices soaring due to reduced harvests after droughts Independent, Zlata Rodianova (16/5/17)

Data

Index Mundi commodities Linked from Economics Network site
Commodity Markets World Bank (see Excel file of monthly prices)

Questions

  1. Explain the specific supply conditions that have affected the price of brazil nuts in 2017.
  2. Why did prices rise ahead of the change in supply?
  3. How has the size of the price rise been affected by the price elasticity of demand for brazil nuts?
  4. What determines the price elasticity of demand for brazil nuts?
  5. Find out what other food prices have risen or fallen a lot in recent months and explain why.
  6. How do real food prices (i.e. prices after correcting for inflation) compare today with 10 and 20 years ago? Explain why.

The UK Parliament’s Culture Media and Sport Select Committee has been examining the secondary ticketing market. The secondary market for events is dominated by four agencies – viagogo, eBay-owned StubHub and Ticket-master’s Get Me In! and Seatwave. These buy tickets to events in the primary market (i.e. from the events or their agents) and then resell them, normally at considerably inflated prices to people unable to get tickets in the primary market.

One example has grabbed the headlines recently. This is where viagogo was advertising tickets for an Ed Sheeran charity concert for £5000. The original tickets were sold for between £40 and £110, with the money going to the Teenage Cancer Trust. None of viagogo’s profits would go to the charity. The tickets were marked ‘not for resale’; so there was doubt that anyone buying a ticket from viagogo would even be able to get into the concert!

There are four major issues.

The first is that the tickets are often sold, as in the case of the Ed Sheeran concert, at many times their face value. We examined this issue back in September 2016 in the blog What the market will bear? Secondary markets and ticket touts).

The second is that the secondary sites use ‘bots’ to buy tickets in bulk when they first come on sale. This makes it much harder for customers to buy tickets on the primary site. Often all the tickets are sold within seconds of coming on sale.

The third is whether the tickets sold on the secondary market are legitimate. Some, like the Ed Sheeran tickets, are marked ‘not for resale’; some are paperless and yet the secondary ticket agencies are accused of selling paper versions, which are worthless.

The fourth is that multiple seats that are listed together are not always located together and so people attending with friends or partners may be forced to sit separately.

These are the issues that were addressed by the Culture Media and Sport committee at its meeting on 21 March. It was due to take evidence from various people, including viagogo, the agency which has come in for the most criticism. Viagogo, however, decided not to attend. This has drawn withering criticism from the press and on social media. One of the other witnesses at the meeting, Keith Kenny, sales and ticketing director for the West End musical Hamilton, described viagogo as ‘a blot on the landscape’. He said, ‘Ultimately, our terms and conditions say ticket reselling is forbidden. If you look at the way that glossy, sneaky site is constructed, they’ve gone an awful long way not to be compliant in the way they’ve built their site.’

The Competition and Markets Authority launched an enforcement investigation last December into suspected breaches of consumer protection law in the online secondary tickets market. This follows on from an earlier report for the government by an independent review chaired by Professor Waterson.

The government itself is considering amending the Digital Economy Bill to make it illegal to use bots to buy tickets in excess of the limit set by the event. Online touts who break this new law would face unlimited fines.

Articles

Touts to face unlimited fines for bulk-buying tickets online Independent, Roisin O’Connor (13/3/17)
Unlimited fines for bulk buying ticket touts BBC News (11/3/17)
Ticket touts face unlimited fines for using ‘bots’ to buy in bulk The Guardian, Rob Davies (10/3/17)
Ticket touts face unlimited fines in government crackdown on bots Music Week, James Hanley (11/3/17)
Government confirms bots ban and better enforcement in response to secondary ticketing review CMU, Chris Cooke (13/3/17)
The ‘Viagogo Glitch’: Why Fans Must Be Put First In The Secondary Ticketing Market Huffington Post, Sharon Hodgson (14/3/17)
Angry MPs accuse no-show Viagogo of ‘fraudulent mis-selling’ of Ed Sheeran tickets i News, Adam Sherwin (21/3/17)
Ed Sheeran’s manager Stuart Camp on secondary ticketing BBC News, Stuart Camp (21/3/17)
Fury at Viagogo no-show as MPs probe tickets on sale for thousands Coventry Telegraph, James Rodger (22/3/17)
Music fans given 10-step guide on how to tackle ticket touts Daily Record, Mark McGivern (20/3/17)
Viagogo snubs MPs’ inquiry into online ticket reselling The Guardian, Rob Davies (21/3/17)
Viagogo a No-Show at U.K. Hearing Into Secondary Ticketing: ‘Huge Lack of Respect’ Billboard, Richard Smirke (21/3/17)
Daily Record campaign against ticket touts reaches Parliament but Viagogo don’t show up to answer claims Daily Record, Torcuil Crichton and Keith McLeod (22/3/17)
Ticketmaster is using its software — and your data — to take on ticket-buying bots recode, Peter Kafka (14/3/17)

Official sites and documents
The Culture, Media and Sport Committee holds a further evidence session on ticket abuse. Culture, Media and Sport Commons Select Committee (20/3/17)
CMA launches enforcement investigation into online secondary ticketing Competition and Markets Authority, Press Release (19/12/16)
Independent Review of Consumer Protection Measures concerning Online Secondary Ticketing Facilities Department for Business, Innovation and Skills, Professor Michael Waterson (May 2016)
Ticket abuse: ban digital ‘harvesting’ software says Committee Culture, Media and Sport Commons Select Committee (24/11/16)

Questions

  1. Use a demand and supply diagram to demonstrate how secondary ticket agencies are able to sell tickets for popular events at prices several times the tickets’ face value.
  2. If secondary ticket sites and ticket touts are able to sell tickets at well above box office prices, isn’t this simply a reflection of people’s willingness to pay (i.e. their marginal utility)? In which case, aren’t these sellers providing a useful service?
  3. How do secondary ticket agencies reduce consumer surplus? Could they reduce it to zero?
  4. See Tickets, the primary market ticket agency, has set up a secondary site, whereby fans can trade tickets with one another at a mark-up capped at just 5%. Will this help to reduce abuses on the secondary market, or is it a totally separate part of the market?
  5. Would it be a good idea for event organisers to charge higher prices for popular events than they do at present, but still below the equilibrium?
  6. How does the price elasticity of demand influence the mark-up that secondary ticket agencies can make? Illustrate this on a diagram similar to the one in question 1.
  7. What measures would you advocate to make tickets more available to the public at reasonable prices? Explain their benefits and any drawbacks.
  8. What would be the effect on prices if the use of bots could be successfully banned?

Many countries have experienced soaring house prices in recent years. To find out why, you need to look at demand and supply.

Low mortgage interest rates and more relaxed lending rules in the last couple of years have stimulated demand. In some countries, such as the UK, demand has been further boosted by governments providing increased help to buyers. In others, various tax breaks are given to house purchasers.

Typically the rise in demand has not been matched by an equivalent rise in supply. Social house building has slowed in many countries and building for private purchase has often be hampered by difficulties in obtaining appropriate land or getting planning permission.

The articles linked below look at the situation in Australia. Here too house prices have been soaring. Over the past 30 years they have grown by 7.25% per year – way above the growth in incomes. As the second article below states:

So expensive are homes becoming that the share of median household income devoted to mortgage payments for Australians aged 35 to 44 has more than doubled in 30 years. Incredibly, it’s happened at a time when mortgage rates have slid to their lowest on record.

But why? Again, to understand this it is necessary to look at demand and supply.

Strong population growth combined with easy availability of mortgage loans, low interest rates and tax breaks for both owner occupiers and property investors have stoked demand, while new building has lagged behind. As far as investors are concerned, any shortfall of rental income over mortgage payments (known as negative gearing) can be offset against tax – and then there is still the capital gain to be made from any increase in the property’s price.

But in some Australian towns and cities, price rises have started to slow down or even fall. This may be due to a fall in demand. For example, in Perth, the ending of the commodity boom has led to a fall in demand for labour in the mining areas; mine workers often live in Perth and fly up to the mining areas for shifts of a week or more. The fall in demand for labour has led to a fall in demand for housing.

House price changes are amplified by speculation. People rush to buy houses when they think house prices will rise, further pushing up prices. Landlords do the same. This speculation fuels the price rises. Speculation also amplifies price falls, with people with houses to sell keen to sell them quickly before prices fall further. Potential purchasers, including property investors, hold back, waiting for prices to fall.

Articles

House prices are surging because of low supply – it’s Economics 101 The Guardian, Stephen Koukoulas (27/10/16)
Who’s to blame for rising house prices? We are, actually. Sydney Morning Herald, Peter Martin (27/10/16)
The Price of Australia’s Real Estate Boom The New York Times, A. Odysseus Patrick (17/10/16)
Solutions beyond supply to the housing affordability problem The Conversation, Nicole Gurran (24/10/16)

Data

Residential Property Price Indexes: Eight Capital Cities Australian Bureau of Statistics (20/9/16)

Questions

  1. Identify the specific demand factors that have driven house price rises in Australia.
  2. How are the price elasticities of demand and supply relevant to explaining house price rises? Use a diagram to illustrate your analysis.
  3. What determines the rate of increase in house prices?
  4. Explain what is meant by ‘negative gearing’. How is the tax treatment of negative gearing relevant to the property market?
  5. What are the arguments for and against giving tax breaks for house purchase?
  6. Why are rising prices seen as politically desirable by politicians?
  7. What practical steps could a government (central or local) take to increase the supply of housing? Would such steps always be desirable?
  8. Does speculation always amplify house price changes? Explain.
  9. How are house prices related to inequality?