Tag: price elasticity of demand

A weekly expense for most families is filling up their car(s) with petrol, but this activity is becoming increasingly expensive and is putting added pressure on lower and middle income families in particular. For those families on lower incomes, a tank of petrol represents a much larger percentage of their income than it does for a higher income household. Assuming that petrol for a month costs you £70 and your monthly income is £500, as a percentage of your income, a tank of petrol costs you 14%. Whereas, if your income is £900, the percentage falls to 7.7% and with a monthly take-home pay of £2000, the cost of a month’s petrol as a percentage of your income is just 3.5%. This is a stark indication of why those on lower incomes feel the burden of higher petrol prices (and indeed, higher prices for any essential items) more than other families.

The price of petrol will today be debated by MPs, following an e-petition signed by more than 100,000 people and having the support of more than 100 MPs. When in power, the Labour government proposed automatic fuel-tax increases, but these were scrapped by the Coalition. However, in January, the government plans to increase fuel duty by 3p a litre and further increases in prices are expected in August in line with inflation. This could mean that the price of unleaded petrol rises to over 1.40p per litre.

And it’s not just households that are feeling the squeeze. The situation described in the first paragraph is just as relevant to firms. The smaller firms, with lower turnover and profits are feeling the squeeze of higher petrol prices more than their larger counterparts. Any businesses that have to transport goods, whether to customers or from wholesalers to retailers etc, are seeing their costs rise, as a tank of petrol is requiring more and more money. To maintain profit margins, firms must pass these cost increases on to their customers in the form of higher prices. Alternatively, they keep prices as they were and take a hit on profitability. If prices rise, they lose customers and if prices are maintained, profitability suffers, which for some companies, already struggling due to the recession, may not be an option.

Mr. Halfon, the Tory MP whose motion launched the e-petition said that fuel prices were causing ‘immense difficulties’ and the Shadow Treasury Minister Owen Smith has said:

‘With our economic recovery choked off well before the recent eurozone crisis, we need action.’

With inflation at 5.2% (I’m writing an hour or so before new inflation data is released on 15/11/11), higher prices for many goods is putting pressure on households. This is possibly contributing towards sluggish growth, as households have less and less disposable income to spend on other goods, after they have purchased their essential items, such as groceries and petrol. A criticism leveled at oil companies is that they quickly pass on price rises, as the world price of oil increases, but do not pass on cuts in oil prices. The issues raised in the debate and how George Osborne and David Cameron respond, together with inflation data for the coming months, may play a crucial role in determining just how much a tank of petrol will cost in the new year.

MPs to debate motion calling for half in petrol prices BBC News (15/11/11)
Petrol price rise: David Cameron faces Commons revolt after No10 e-petition Guardian, Cherry Wilson (15/11/11)
David Cameron faces backbench rebellion over fuel price hike Telegraph, Rowena Mason (14/11/11)
Petrol prices may be slashed by Rs 2 per litre on November 16 The Economic Times (15/11/11)
Paying the price as fuel costs rise BBC News (15/11/10)
Oil barons the big winners from soaring pump prices, ONS figures reveal Daily Mirror, Graham Hiscott (15/11/11)
Scrap rise in petrol duty: 100 MPs demand Osborne abandon planned 3p increase Mail Online, Ray Massey and Tim Shipman (15/11/11)

Questions

  1. As the price of petrol rises, why do people continue to buy it? What does it suggest about the elasticity of this product?
  2. Why do higher prices affect lower income families more than higher income families?
  3. What are the arguments (a) for and (b) against George Osborne’s planned 3p rise in petrol duty?
  4. Do you think that higher prices are contributing towards sluggish growth? Why?
  5. What type of tax is imposed on petrol? Is it equitable? Is it efficient?
  6. Why can the oil companies pass price rises on to petrol stations, but delay passing on any price reductions? Is there a need for better regulation and more pressure on oil companies to change their behaviour?

The law of demand tells us that when the price of a good falls, quantity demanded will rise. But, firms want to know much more than this. They need to know by how much quantity demanded will rise – we refer to this as the price elasticity of demand (PED) and we can categorise it as relatively inelastic or elastic, depending on by how much demand changes relative to the change in price. The price elasticity of demand is crucial for a firm to know, as it gives them vital information about the best price to charge and getting the price right is probably the most important element in a successful business. As Warren Buffett said in a meeting with the staff from the Federal Crisis Inquiry Commission:

‘Basically, the single most important decision in evaluating a business is pricing power. You’ve the power to raise prices without losing business to a competitor, and you’ve got a very good business. And if you have to have a prayer session before raising the price by a tenth of a cent, then you got a terrible business.’

The grammar may not be entirely correct, but hopefully you get the gist! Should a firm increase price or reduce it? Whatever action it takes, there will be an effect on demand, total revenue and profit. The key question is: what will be the effect? The answer depends on the PED.

If a firm is selling a product for which there are no close substitutes, we would expect demand to be relatively inelastic. This means that the firm can increase the price it charges without seeing any large fall in quantity. On the other hand, if a firm faces a lot of competition and hence there are many substitutes for a product, then demand becomes much more elastic – any increase in a firm’s price will lead to a proportionately larger decrease in the quantity demanded, as customers will simply switch to a cheaper alternative. The article below looks at the concept of price elasticity of demand and how it is used in practice by competing firms.

The importance of pricing power: PEP, CPB Guru Focus (16/10/11)
Pricing strong for Philip Morris in Q3, but volumes also encouraging; dividend yield attractive MorningStar (7/11/11)

Questions

  1. How do we define price elasticity of demand and what formula can we use to calculate it?
  2. If a firm faces an PED of –5, is its demand relatively inelastic or elastic and what does it mean about the responsiveness of customer demand to a change in price?
  3. If a firm faces demand that is (a) relatively inelastic (b) relatively elastic, (c) perfectly elastic (d) perfectly inelastic, what should it do to its price? Explain your answers.
  4. In the article, ‘The importance of pricing power’, is demand for the ‘Daily Racing Forum’ relatively inelastic or elastic? Explain your answer and what it means in terms of the company’s ability to change price.
  5. Is demand for cigarettes likely to be inelastic or elastic? Explain your answer. What does this suggest about a firm’s ability to pass on taxation and excise duties to its customers in the form of higher prices?
  6. Based on the data given in ‘The importance of pricing power’ about the change in demand for Campbell’s Soup and PepsiCo, what conclusions can we reach about PED? How could these firms use this information to set prices and maximise revenue and profit?
  7. Following a change in supply (due to a factor other than price), when will the impact on equilibrium price be larger than the impact on equilibrium quantity?

The price of petrol at the pumps has risen substantially over the past few years. In the UK, according to the AA, the average price between January and June 2011 was 133.13p. In the same period in 2010 it was 116.68p; and in the same period in 2008 it was 109.00p.

Over the first six months of 2011, the amount of petrol sold fell by 5.2 per cent. This was on top of the decline in consumption over the previous four years. Between 2006 and 2010 consumption of petrol fell by 17.4%. The consumption of petrol and diesel are given in the following table.

UK consumption of petrol and diesel (tonnes millions)

2006 2007 2008 2009 2010
Petrol 18.14 17.59 16.68 15.76 14.99
Diesel 20.15 21.07 20.61 20.06 20.87
Total 38.29 38.66 37.29 35.82 35.86

Source: Digest of United Kingdom energy statistics (DUKES) (Department of Energy and Climate Change)

So what has caused this decline in petrol sales? Are there multiple factors at work here? Have a look at the articles and consider the explanations.

Articles
Cash-strapped drivers cut petrol use by 15 per cent Channel 4 News (5/10/11)
Sales of petrol slump as skint motorists cut costs Daily Record, Jamie Grierson (5/10/11)
Petrol Sales Plunge As Cash Squeeze Tightens Sky News (6/10/11)
Fuel cost rise ‘forcing change in driver habits’ TRL News, Mary Treen (6/10/11)

Data
Digest of United Kingdom energy statistics (DUKES) Department of Energy and Climate Change
Fuel price report (monthly) Automobile Association
Brent Crude spot prices Energy Information Association

Questions

  1. What factors have caused a fall in consumption of petrol?
  2. If you choose to spend a set amount on petrol, what is your price elasticity of demand?
  3. What determines the price elasticity of demand for petrol?
  4. Why has the consumption of diesel fallen less than that of petrol?
  5. Under what circumstances would an increase in tax on road fuel of 3p per litre (as planned for January 2012), result in a decrease in tax revenue? Why would the price elasticity of demand for road fuel have to be significantly greater than 1 (ignoring the minus sign) and not merely above 1 for this to be the case?
  6. Why is it likely that people’s price elasticity of demand for road fuel will become less elastic the more they have cut back on consumption?
  7. Why is the demand for petrol likely to be more elastic with respect to (a) price, and (b) income over the longer term?
  8. To what extent is the demand for road fuel a ‘derived demand’?
  9. To what extent is the fall in the consumption of petrol a reflection of a movement along the demand curve for petrol or a shift in the demand curve? Explain.

Families in the UK seemed to have been squeezed in all areas. With incomes flat, inflation rising, petrol and bills high, there seems to be a never ending cycle of price rises without the corresponding increase in incomes. This has been confirmed by the latest figures released from the big six energy companies, whose profit margins have risen from £15 per customer in June to £125 per customer per year. This is assuming that prices remain the same for the coming year.

The regulator, Ofgem has said that profit margins will fall by next year and that they are ensuring that price comparisons between the big energy companies become much easier to allow consumers to shop around. It is a competitive market and yet due to tariffs being so complicated to understand, many consumers are simply unable to determine which company is offering them the best deal. There is certainly not perfect knowledge in this market. Tim Yeo, the Chair of the Energy and Climate Change Committee said the profit margins were:

‘Evidence of absolutely crass behaviour by the energy companies, with a jump in prices announced in the last few months ahead of what will be a winter in which most families face their highest ever electricity and gas bills’

Ofgem will publish proposals later this year with suggestions of how to make the market more competitive. We have already seen in the blog “An energetic escape?” how Ofgem is hoping to reduce the power of the big six by forcing them to auction off some of the electricity they generate. The aim is to free up the market and allow more firms to enter. With the winter fast approaching and based on the past 2 years of snow and cold weather, it is no wonder that households are concerned with finding the best deals in a bid to reduce just one of their bills. The following articles consider this issue.

Energy price hikes see profits soar The Press Association (14/10/11)
Energy suppliers’ profit margins eight times higher, says regulator Ofgem Telegraph (14/10/11)
Energy firms’ profit margins soar, Ofgem says BBC News (14/10/11)
Energy firms’ profits per customer rise 733%, says Ofgem Guardian, Dan Milmo and Lisa Bachelor (14/10/11)
Regulator proposes radical change to energy market Associated Press (14/10/11)
Energy bills face overhaul in first wave of reform Reuters, Paul Hoskins (14/10/11)
Ofgem tells energy companies to simplify tariffs Financial Times, Michael Kavanagh (14/10/11)
You can’t shop around in an oligopoly Financial Times, William Murray (13/10/11)

Questions

  1. What type of market structure best describes the energy market?
  2. Of the actions being taken by Ofgem, which do you think will have the largest effect on competition in the market?
  3. Are there any other reforms you think would be beneficial for competition?
  4. Why is transparency so important in a market?
  5. What barriers to entry are there for potential competitors in the energy market?
  6. Why do you think profit margins are so high in this sector?

Anyone investing in commodities over the past few weeks will have been in for a bumpy ride. During the first part of 2011, commodity prices have soared (see A perfect storm brewing?). This has fuelled inflation and has caused the Bank of England to revise upwards its forecast for inflation (see Busy doing nothing see also Prospects for Inflation).

But then in the first week of May, commodity prices plumetted. On the 5 May, oil prices fell by 7.9% – their largest daily amount since January 2009. Between 28 April and 6 May silver prices fell from $48.35 per ounce to just over $33.60 per ounce – a fall of over 30%. And it was the same with many other commodities – metals, minerals, agricultural raw materials and foodstuffs.

Many financial institutions, companies and individuals speculate in commodities, hoping to make money buy buying at a low price and selling at a high price. When successful, speculators can make large percentage gains in a short period of time. But they can also lose by getting their predictions wrong. In uncertain times, speculation can be destabilising, exaggerating price rises and falls as speculators ‘jump on the bandwagon’, seeing price changes as signifying a trend. In more stable times, speculation can even out price changes as speculators buy when prices are temporarily low and sell when they are temporarily high.

Times are uncertain at present. Confidence fluctuates over the strength of the world recovery. On days of good economic news, demand for commodities rises as people believe that a growing world economy will drive up the demand for commodities and hence their prices. On days of bad economic news, the price of commodities can fall. The point is that when undertainty is great, commodity prices can fluctuates wildly.

Articles
Commodities plunge: Blip or turning point? BBC News, Laurence Knight (6/5/11)
Commodity hedge fund loses $400m in oil slide Financial Times, Sam Jones (8/5/11)
Commodities: ‘epic rout’ or the new normal? BBC News blogs: Stephanomics, Stephanie Flanders (6/5/11)
Commodities Still a Bubble – But Prices May Continue to Rise Seeking Alpha, ChartProphet (9/5/11)
When a sell-off is good news The Economist, Buttonwood (6/5/11)
Gilt-edged argument The Economist, Buttonwood (28/4/11)
Commodities: What volatility means for your portfolio Reuters blogs: Prism Money (9/5/11)
Gold, silver rise again on debt, inflation concerns Reuters, Frank Tang (10/5/11)
Commodities After The Crash, No Way But Up The Market Oracle, Andrew McKillop (9/5/11)
Outlook 2011:Three Dominant Factors Will Impact Precious Metals in 2011 GoldSeek (9/5/11)
Energy bills set to rise sharply next winter, Centrica warn Guardian, Graeme Wearden (9/5/11)
Dollar triggered commodities ‘flash crash’, not Bin Laden The Telegraph, Garry White, and Rowena Mason (9/5/11)
The outlook for commodity prices Live Mint@The Wall Steet Journal, Manas Chakravarty (11/5/11)
Three ways to play the next commodities bubble Market Watch, Keith Fitz-Gerald (11/5/11)

Data
Commodity Prices Index Mundi
Commodities Financial Times
Commodities BBC Market Data

Questions

  1. Why did commodity prices fall so dramatically in early May, only to rise again rapidly afterwards?
  2. Why do commodity prices fluctuate more than house prices?
  3. What is the relevance of price elasticity of demand and supply in explaining the volatility of commodity prices?
  4. Under what circumstances is speculation likely to be (a) stabilising; (b) destabilising?
  5. To what extent are rising commodity prices (a) the cause of and (b) the effect of world inflation?
  6. If commodity prices go on rising every year, will inflation go on rising? Explain.