🗊Презентация The economics of the public sector. (Lecture 4)

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The economics of the public sector. (Lecture 4), слайд №1The economics of the public sector. (Lecture 4), слайд №2The economics of the public sector. (Lecture 4), слайд №3The economics of the public sector. (Lecture 4), слайд №4The economics of the public sector. (Lecture 4), слайд №5The economics of the public sector. (Lecture 4), слайд №6The economics of the public sector. (Lecture 4), слайд №7The economics of the public sector. (Lecture 4), слайд №8The economics of the public sector. (Lecture 4), слайд №9The economics of the public sector. (Lecture 4), слайд №10The economics of the public sector. (Lecture 4), слайд №11The economics of the public sector. (Lecture 4), слайд №12The economics of the public sector. (Lecture 4), слайд №13The economics of the public sector. (Lecture 4), слайд №14The economics of the public sector. (Lecture 4), слайд №15The economics of the public sector. (Lecture 4), слайд №16The economics of the public sector. (Lecture 4), слайд №17The economics of the public sector. (Lecture 4), слайд №18The economics of the public sector. (Lecture 4), слайд №19The economics of the public sector. (Lecture 4), слайд №20The economics of the public sector. (Lecture 4), слайд №21The economics of the public sector. (Lecture 4), слайд №22The economics of the public sector. (Lecture 4), слайд №23The economics of the public sector. (Lecture 4), слайд №24The economics of the public sector. (Lecture 4), слайд №25The economics of the public sector. (Lecture 4), слайд №26The economics of the public sector. (Lecture 4), слайд №27The economics of the public sector. (Lecture 4), слайд №28The economics of the public sector. (Lecture 4), слайд №29The economics of the public sector. (Lecture 4), слайд №30The economics of the public sector. (Lecture 4), слайд №31The economics of the public sector. (Lecture 4), слайд №32The economics of the public sector. (Lecture 4), слайд №33The economics of the public sector. (Lecture 4), слайд №34The economics of the public sector. (Lecture 4), слайд №35
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The economics of the public sector. (Lecture 4), слайд №1
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10 Externalities
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10 Externalities

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Recall: Adam Smith’s “invisible hand” of the marketplace leads self-interested buyers and sellers in a market to maximize the total benefit that society can derive from a market. But market failures can still happen.
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Recall: Adam Smith’s “invisible hand” of the marketplace leads self-interested buyers and sellers in a market to maximize the total benefit that society can derive from a market. But market failures can still happen.

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EXTERNALITIES AND MARKET INEFFICIENCY An externality refers to the uncompensated impact of one person’s actions on the well-being of a bystander. Externalities cause markets to be inefficient, and thus fail to maximize total surplus.
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EXTERNALITIES AND MARKET INEFFICIENCY An externality refers to the uncompensated impact of one person’s actions on the well-being of a bystander. Externalities cause markets to be inefficient, and thus fail to maximize total surplus.

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EXTERNALITIES AND MARKET INEFFICIENCY An externality arises... . . . when a person engages in an activity that influences the well-being of a bystander and yet neither pays nor receives any compensation for that effect.
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EXTERNALITIES AND MARKET INEFFICIENCY An externality arises... . . . when a person engages in an activity that influences the well-being of a bystander and yet neither pays nor receives any compensation for that effect.

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EXTERNALITIES AND MARKET INEFFICIENCY When the impact on the bystander is adverse, the externality is called a negative externality. When the impact on the bystander is beneficial, the externality is called a positive externality.
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EXTERNALITIES AND MARKET INEFFICIENCY When the impact on the bystander is adverse, the externality is called a negative externality. When the impact on the bystander is beneficial, the externality is called a positive externality.

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EXTERNALITIES AND MARKET INEFFICIENCY Negative Externalities Automobile exhaust Cigarette smoking Barking dogs (loud pets) Loud stereos in an apartment building
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EXTERNALITIES AND MARKET INEFFICIENCY Negative Externalities Automobile exhaust Cigarette smoking Barking dogs (loud pets) Loud stereos in an apartment building

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EXTERNALITIES AND MARKET INEFFICIENCY Positive Externalities Immunizations Restored historic buildings Research into new technologies
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EXTERNALITIES AND MARKET INEFFICIENCY Positive Externalities Immunizations Restored historic buildings Research into new technologies

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Figure 1 The Market for Aluminum
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Figure 1 The Market for Aluminum

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EXTERNALITIES AND MARKET INEFFICIENCY Negative externalities lead markets to produce a larger quantity than is socially desirable. Positive externalities lead markets to produce a smaller quantity than is socially desirable.
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EXTERNALITIES AND MARKET INEFFICIENCY Negative externalities lead markets to produce a larger quantity than is socially desirable. Positive externalities lead markets to produce a smaller quantity than is socially desirable.

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Welfare Economics: A Recap The Market for Aluminum The quantity produced and consumed in the market equilibrium is efficient in the sense that it maximizes the sum of producer and consumer surplus. If the aluminum factories emit pollution (a negative externality), then the cost to society of producing aluminum is larger than the cost to aluminum producers.
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Welfare Economics: A Recap The Market for Aluminum The quantity produced and consumed in the market equilibrium is efficient in the sense that it maximizes the sum of producer and consumer surplus. If the aluminum factories emit pollution (a negative externality), then the cost to society of producing aluminum is larger than the cost to aluminum producers.

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Welfare Economics: A Recap The Market for Aluminum For each unit of aluminum produced, the social cost includes the private costs of the producers plus the cost to those bystanders adversely affected by the pollution.
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Welfare Economics: A Recap The Market for Aluminum For each unit of aluminum produced, the social cost includes the private costs of the producers plus the cost to those bystanders adversely affected by the pollution.

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Figure 2 Pollution and the Social Optimum
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Figure 2 Pollution and the Social Optimum

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Negative Externalities The intersection of the demand curve and the social-cost curve determines the optimal output level. The socially optimal output level is less than the market equilibrium quantity.
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Negative Externalities The intersection of the demand curve and the social-cost curve determines the optimal output level. The socially optimal output level is less than the market equilibrium quantity.

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Negative Externalities Internalizing an externality involves altering incentives so that people take account of the external effects of their actions.
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Negative Externalities Internalizing an externality involves altering incentives so that people take account of the external effects of their actions.

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Negative Externalities Achieving the Socially Optimal Output The government can internalize an externality by imposing a tax on the producer to reduce the equilibrium quantity to the socially desirable quantity.
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Negative Externalities Achieving the Socially Optimal Output The government can internalize an externality by imposing a tax on the producer to reduce the equilibrium quantity to the socially desirable quantity.

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Positive Externalities When an externality benefits the bystanders, a positive externality exists. The social value of the good exceeds the private value.
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Positive Externalities When an externality benefits the bystanders, a positive externality exists. The social value of the good exceeds the private value.

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Positive Externalities A technology spillover is a type of positive externality that exists when a firm’s innovation or design not only benefits the firm, but enters society’s pool of technological knowledge and benefits society as a whole.
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Positive Externalities A technology spillover is a type of positive externality that exists when a firm’s innovation or design not only benefits the firm, but enters society’s pool of technological knowledge and benefits society as a whole.

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Figure 3 Education and the Social Optimum
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Figure 3 Education and the Social Optimum

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Positive Externalities The intersection of the supply curve and the social-value curve determines the optimal output level. The optimal output level is more than the equilibrium quantity. The market produces a smaller quantity than is socially desirable. The social value of the good exceeds the private value of the good.
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Positive Externalities The intersection of the supply curve and the social-value curve determines the optimal output level. The optimal output level is more than the equilibrium quantity. The market produces a smaller quantity than is socially desirable. The social value of the good exceeds the private value of the good.

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Positive Externalities Internalizing Externalities: Subsidies Used as the primary method for attempting to internalize positive externalities. Industrial Policy Government intervention in the economy that aims to promote technology-enhancing industries Patent laws are a form of technology policy that give the individual (or firm) with patent protection a property right over its invention. The patent is then said to internalize the externality.
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Positive Externalities Internalizing Externalities: Subsidies Used as the primary method for attempting to internalize positive externalities. Industrial Policy Government intervention in the economy that aims to promote technology-enhancing industries Patent laws are a form of technology policy that give the individual (or firm) with patent protection a property right over its invention. The patent is then said to internalize the externality.

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PRIVATE SOLUTIONS TO EXTERNALITIES Government action is not always needed to solve the problem of externalities.
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PRIVATE SOLUTIONS TO EXTERNALITIES Government action is not always needed to solve the problem of externalities.

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PRIVATE SOLUTIONS TO EXTERNALITIES Moral codes and social sanctions Charitable organizations Integrating different types of businesses Contracting between parties
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PRIVATE SOLUTIONS TO EXTERNALITIES Moral codes and social sanctions Charitable organizations Integrating different types of businesses Contracting between parties

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The Coase Theorem The Coase Theorem is a proposition that if private parties can bargain without cost over the allocation of resources, they can solve the problem of externalities on their own. Transactions Costs Transaction costs are the costs that parties incur in the process of agreeing to and following through on a bargain.
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The Coase Theorem The Coase Theorem is a proposition that if private parties can bargain without cost over the allocation of resources, they can solve the problem of externalities on their own. Transactions Costs Transaction costs are the costs that parties incur in the process of agreeing to and following through on a bargain.

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Why Private Solutions Do Not Always Work Sometimes the private solution approach fails because transaction costs can be so high that private agreement is not possible.
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Why Private Solutions Do Not Always Work Sometimes the private solution approach fails because transaction costs can be so high that private agreement is not possible.

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PUBLIC POLICY TOWARD EXTERNALITIES When externalities are significant and private solutions are not found, government may attempt to solve the problem through . . . command-and-control policies. market-based policies.
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PUBLIC POLICY TOWARD EXTERNALITIES When externalities are significant and private solutions are not found, government may attempt to solve the problem through . . . command-and-control policies. market-based policies.

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PUBLIC POLICY TOWARD EXTERNALITIES Command-and-Control Policies Usually take the form of regulations: Forbid certain behaviors. Require certain behaviors. Examples: Requirements that all students be immunized. Stipulations on pollution emission levels set by the Environmental Protection Agency (EPA).
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PUBLIC POLICY TOWARD EXTERNALITIES Command-and-Control Policies Usually take the form of regulations: Forbid certain behaviors. Require certain behaviors. Examples: Requirements that all students be immunized. Stipulations on pollution emission levels set by the Environmental Protection Agency (EPA).

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PUBLIC POLICY TOWARD EXTERNALITIES Market-Based Policies Government uses taxes and subsidies to align private incentives with social efficiency. Pigovian taxes are taxes enacted to correct the effects of a negative externality.
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PUBLIC POLICY TOWARD EXTERNALITIES Market-Based Policies Government uses taxes and subsidies to align private incentives with social efficiency. Pigovian taxes are taxes enacted to correct the effects of a negative externality.

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PUBLIC POLICY TOWARD EXTERNALITIES Examples of Regulation versus Pigovian Tax If the EPA decides it wants to reduce the amount of pollution coming from a specific plant. The EPA could… tell the firm to reduce its pollution by a specific amount (i.e. regulation). levy a tax of a given amount for each unit of pollution the firm emits (i.e. Pigovian tax).
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PUBLIC POLICY TOWARD EXTERNALITIES Examples of Regulation versus Pigovian Tax If the EPA decides it wants to reduce the amount of pollution coming from a specific plant. The EPA could… tell the firm to reduce its pollution by a specific amount (i.e. regulation). levy a tax of a given amount for each unit of pollution the firm emits (i.e. Pigovian tax).

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PUBLIC POLICY TOWARD EXTERNALITIES Market-Based Policies Tradable pollution permits allow the voluntary transfer of the right to pollute from one firm to another. A market for these permits will eventually develop. A firm that can reduce pollution at a low cost may prefer to sell its permit to a firm that can reduce pollution only at a high cost.
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PUBLIC POLICY TOWARD EXTERNALITIES Market-Based Policies Tradable pollution permits allow the voluntary transfer of the right to pollute from one firm to another. A market for these permits will eventually develop. A firm that can reduce pollution at a low cost may prefer to sell its permit to a firm that can reduce pollution only at a high cost.

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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits
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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits

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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits
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Figure 4 The Equivalence of Pigovian Taxes and Pollution Permits

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Summary When a transaction between a buyer and a seller directly affects a third party, the effect is called an externality. Negative externalities cause the socially optimal quantity in a market to be less than the equilibrium quantity. Positive externalities cause the socially optimal quantity in a market to be greater than the equilibrium quantity.
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Summary When a transaction between a buyer and a seller directly affects a third party, the effect is called an externality. Negative externalities cause the socially optimal quantity in a market to be less than the equilibrium quantity. Positive externalities cause the socially optimal quantity in a market to be greater than the equilibrium quantity.

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Summary Those affected by externalities can sometimes solve the problem privately. The Coase theorem states that if people can bargain without a cost, then they can always reach an agreement in which resources are allocated efficiently.
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Summary Those affected by externalities can sometimes solve the problem privately. The Coase theorem states that if people can bargain without a cost, then they can always reach an agreement in which resources are allocated efficiently.

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Summary When private parties cannot adequately deal with externalities, then the government steps in. The government can either regulate behavior or internalize the externality by using Pigovian taxes or by issuing pollution permits.
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Summary When private parties cannot adequately deal with externalities, then the government steps in. The government can either regulate behavior or internalize the externality by using Pigovian taxes or by issuing pollution permits.

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