ECON 2G03 Lecture 4: LEcture 4 part 1

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Consumer surplus- measures the total benefit to all consumers. Producer surplus- measures the total profits of producers, plus rents to factor inputs: together consumer and producer surplus measure the welfare benefit and competitive market. Application of consumer and producer surplus welfare effects- gains and losses to consumers and producers deadweight loss- net loss of total (consumer plus producer) surplus. Effects of price controls when demand is inelastic. If demand is sufficiently inelastic consumers suffer a net loss from price control. Economic efficiency- maximization of aggregate consumer and producer surplus. Market failure- situation in which an unregulated competitive market is inefficient because prices fail to provide proper signals to consumers and producers. There are two important instances in which market failure can occur: externalities, lack of information. Externality- action taken by either a producer or a consumer which affects other producers or consumers but is not accounted for by the market price.

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