Economics_A-level_Edexcel
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1-1-nature-of-economics6 主题
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1-2-how-markets-work10 主题
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1-3-market-failure4 主题
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1-4-government-intervention2 主题
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2-1-measures-of-economic-performance4 主题
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2-2-aggregate-demand-ad5 主题
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2-3-aggregate-supply-as3 主题
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2-4-national-income4 主题
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2-5-economic-growth4 主题
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2-6-macroeconomic-objectives-policies4 主题
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3-1-business-growth3 主题
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3-2-business-objectives1 主题
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3-3-revenues-costs-and-profits4 主题
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3-4-market-structures7 主题
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3-5-labour-market3 主题
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3-6-government-intervention2 主题
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4-1-international-economics9 主题
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4-2-poverty-inequality2 主题
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4-3-emerging-developing-economies3 主题
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4-4-the-financial-sector3 主题
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4-5-role-of-the-state-in-the-macroeconomy4 主题
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5-1-the-exam-papers3 主题
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5-2-economics-a-level-skills1 主题
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5-3-structuring-your-responses9 主题
information-gaps
Information Gaps
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Information gaps exist in all free markets and distort market outcomes, resulting in market failure
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One of the underlying assumptions of a free market is that there is perfect information in the market
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This means that buyers and sellers have exactly the same level of information about the good/service. This is called symmetric information
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In many markets buyers and sellers have different levels of information. This is called asymmetric information. For example, there is asymmetric information in the used car market – sellers know more about the vehicle than the buyers
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Asymmetric information distorts socially optimal prices and quantities in markets, resulting in over-provision or under-provision of goods/services
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For example, goods/services with dangerous side effects would be sold in lower quantities if buyers were aware of these effects (consider the VW emissions scandal). Fewer factors of production should be allocated towards producing these
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Similarly, goods/services with extra benefits would be sold in higher quantities if buyers were aware of them. More factors of production should be allocated towards producing these
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Responses