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© Tutor2u Limited All Rights Reserved. These study notes are protected by copyright and may not be reproduced in part or in whole, for whatever reason, without the prior written permission of tutor2u. The use of tutor2u content for commercial gain of any kind is strictly forbidden. We reserve the right to take legal action against any party or parties found to have breached our copyright. AS Market FailureImperfect Information |
Both consumers and producers require complete information if they are to make efficient choices and decisions about what to buy and what to supply to the market. What happens when this information is missing or incomplete? Missing information in the market In the standard textbook theory of competitive markets we assume that all “agents” in the market enjoy perfect information about the availability of goods and services and also complete information about prices charged by suppliers. Consumers can make purchasing decisions on the basis of full and free information on the products that they are buying. The reality of course is different! All of us experience information deficits which can often lead to a misallocation of resources and hence the possibility of market failure. Information failure occurs when people have inaccurate, incomplete, uncertain or misunderstood data and so make potentially ‘wrong’ choices. For example, you and I might under or over-estimate the private benefit from consuming a particular good or service. The classic case of this is the demand for health or education services– where consumers may well underestimate the long term private benefits from investing time and money into extra education or buying a specific form of health treatment. There may well be a case for the government to intervene in the market in some way if information failures become serious. Examples of information failure Imperfect information can be caused by
Imperfect information – are equity release schemes being mis-sold? The consumer watchdog group Which? has criticized the advertising of housing equity release schemes which they claim can be very expensive and inflexible leaving homeowners, and especially older property owners, with virtually no equity in their properties later on in their life. Which? claims that, for example, borrowing £80,000 through a lump sum equity release scheme on a £350,000 property could end up costing £256,570 after 20 years or £343,350 after 25 years. Although the equity release schemes give property-owners the cash (or liquidity) that might be needed to meet short term spending needs, Which claims that such schemes are incredible expensive and that downsizing your property or even borrowing money from family is a much better option. Which? believe some suppliers of equity release schemes have engaged in irresponsible advertising which can lead to a miss-selling of the product. Norwich Union, for example, suggests its scheme could pay for a trip to New York or 'something for the family'. Source: Adapted from the Which? Website Health warnings for snacks in bid to improve consumer information The food industry has made its first move towards issuing health warnings for snack foods. The decision comes as food companies come under in-creasing pressure to provide more information about the nutritional value of their products amid concern about rising levels of obesity. It marks a shift in the food industry’s attitude towards consumers. Food companies have argued that consumer education is not their job. However, the threat of legislation to regulate the promotion of food to children has prompted the food and drink industry to become more proactive. The European Commission released a green paper in December questioning whether companies’ self-regulation for the marketing of sugary snacks and soft drinks was “adequate”. Last month, soft drink producers agreed to a voluntary ban on advertising to children in Europe. They also said they would provide better nutritional information on beverages and public education campaigns to promote healthy lifestyles. Food and drink manufacturers have already made efforts to cut down on fats, salts and sugars, and provide more nutritional information. This week, Walkers crisps said it had made a multimillion pound investment in sun seed oil to reduce levels of saturated fats. Last month, Nestlé said it would put calorie information on the front of confectionery packets. Source: Adapted from news reports, February 2006 The effects of asymmetric information Asymmetric information occurs when somebody knows more than somebody else in the market. Such asymmetric information can make it difficult for the two people to do business together Examples include the following:
Asymmetric information can distort people's incentives to buy and sell goods and services at the right prices and as a result can lead to inefficiencies and market failure. One of the classic examples of asymmetric information comes from research on the used car market by the Nobel Prize winning economist George Akerlof – in his theory of the market for lemons! The Market for Lemons Take problem of buying a used car. Assume that used cars come in two types: those that are in good repair, and duds (or “lemons” as Americans and most economists call them). Suppose further that used-car shoppers would be prepared to pay $20,000 for a good one and $10,000 for a lemon. As for the sellers, lemon-owners require $8,000 to part with their old banger, while the one-owner, careful-driver old lady with the well-maintained estate won't part with hers for less than $17,000. If buyers had the information to tell wheat from chaff, they could strike fair trades with the sellers, the old lady getting a high price and the lemon-owner rather less. If buyers cannot spot the quality difference, though, as is often the case in the real world, there will be only one market for all used cars, and buyers will be ready to pay only the average price of a good car and a lemon, or $15,000. This is below the $17,000 that good-car owners require; so they will exit the market, leaving only bad cars. This result, when bad quality pushes good quality from the market because of an information gap, is known as “adverse selection”. This was the simple but powerful insight of George Akerlof, now a professor at the University of Berkeley in California, in a seminal 1970 paper. A great many markets, including those for shares, labour, insurance and banking, often resemble a used-car sale more closely than a McDonald's restaurant. Adapted from the Economist, October 2001
Try to avoid choosing a lemon (a bad car) when you use the second hand car market! |
| Author: Geoff Riley, Eton College, September 2006 |
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