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Questions and Answers
Formally derive the Samuelson condition from the Lagrangian, showing all steps, and explicitly state what assumptions are necessary for its validity. Explain the economic interpretation of the condition in terms of marginal rates of substitution and transformation.
Formally derive the Samuelson condition from the Lagrangian, showing all steps, and explicitly state what assumptions are necessary for its validity. Explain the economic interpretation of the condition in terms of marginal rates of substitution and transformation.
The Samuelson condition, $\sum_{h=1}^{H} MRS_{G,i} = MRT_{iG}$, is derived from the Lagrangian by maximizing social welfare subject to a resource constraint. The economic interpretation is that the sum of individual marginal rates of substitution between the public good and a private good must equal the marginal rate of transformation between the public good and the private good for efficient allocation.
Consider an economy with $H$ households and $m$ firms, where the production function of each firm $j$ is given by $y^j = f^j(l^j, G)$, where $l^j$ is labor and $G$ is a public input. If $G = \theta^{-1}(l^G)$, derive the condition for the optimal provision of the public input, demonstrating how the marginal products in all firms equate to opportunity costs. Further, discuss how this condition is affected by the productivity of labor, $\theta$.
Consider an economy with $H$ households and $m$ firms, where the production function of each firm $j$ is given by $y^j = f^j(l^j, G)$, where $l^j$ is labor and $G$ is a public input. If $G = \theta^{-1}(l^G)$, derive the condition for the optimal provision of the public input, demonstrating how the marginal products in all firms equate to opportunity costs. Further, discuss how this condition is affected by the productivity of labor, $\theta$.
The condition, $\sum_j \frac{\partial f^j}{\partial G} = \frac{\partial f^j}{\partial l^j}$, implies the sum of marginal products in all firms equals opportunity costs. Productivity of labor, $\theta$, influences the scale of $l^G$, and thus the level of $G$, impacting marginal products and the overall optimal provision.
Suppose a public good is financed through majority voting with cost shared equally among households. Outline the conditions under which the median voter outcome aligns with the efficient Samuelson condition. Discuss potential scenarios where this alignment fails and explain how income inequality might influence the voting outcome.
Suppose a public good is financed through majority voting with cost shared equally among households. Outline the conditions under which the median voter outcome aligns with the efficient Samuelson condition. Discuss potential scenarios where this alignment fails and explain how income inequality might influence the voting outcome.
Alignment occurs when the median voter's MRS equals the mean MRS of the population. This fails if the median voter is not representative or preferences are skewed. Income inequality can skew preferences and distort the voting outcome, leading to under- or over-provision.
Elaborate on the concept of distortionary financing of public goods following Atkinson and Stern (1974). Write the Lagrangian, incorporating the effects of distortionary taxes. Explain in detail how the conditions for optimal public good provision differ from the standard Samuelson rule under lump-sum taxation. What are the key implications for public policy?
Elaborate on the concept of distortionary financing of public goods following Atkinson and Stern (1974). Write the Lagrangian, incorporating the effects of distortionary taxes. Explain in detail how the conditions for optimal public good provision differ from the standard Samuelson rule under lump-sum taxation. What are the key implications for public policy?
Consider the distortions introduced when using commodity taxes to finance public goods. Derive an expression for $\alpha / \lambda$, where $\alpha$ is the private marginal utility of income and $\lambda$ is the shadow price of public funds, under the conditions of taxation. Evaluate how deviations from the basic rule (α/λ = 1) affect the optimal public good supply. What are the policy implications for the level of public good provision?
Consider the distortions introduced when using commodity taxes to finance public goods. Derive an expression for $\alpha / \lambda$, where $\alpha$ is the private marginal utility of income and $\lambda$ is the shadow price of public funds, under the conditions of taxation. Evaluate how deviations from the basic rule (α/λ = 1) affect the optimal public good supply. What are the policy implications for the level of public good provision?
In the context of personalized prices (Lindahl pricing), explain how Lindahl equilibrium leads to a Pareto-efficient allocation of public goods. Discuss the practical challenges associated with implementing Lindahl pricing in a real-world economy and how preference revelation mechanisms attempt to address these challenges.
In the context of personalized prices (Lindahl pricing), explain how Lindahl equilibrium leads to a Pareto-efficient allocation of public goods. Discuss the practical challenges associated with implementing Lindahl pricing in a real-world economy and how preference revelation mechanisms attempt to address these challenges.
Critically evaluate the experimental evidence on free-riding in public goods games. What behavioral factors, such as altruism and warm-glow giving, are not captured in standard economic models? How do these factors influence the provision of public goods in laboratory settings versus real-world contexts?
Critically evaluate the experimental evidence on free-riding in public goods games. What behavioral factors, such as altruism and warm-glow giving, are not captured in standard economic models? How do these factors influence the provision of public goods in laboratory settings versus real-world contexts?
Discuss the concept of crowding out in the context of private contributions to public goods. Differentiate between the theoretical predictions of complete crowd-out and the empirical evidence. How do studies by Andreoni and Payne (2003) contribute to understanding the relationship between government spending and private charitable giving, and what are the implications for policymakers?
Discuss the concept of crowding out in the context of private contributions to public goods. Differentiate between the theoretical predictions of complete crowd-out and the empirical evidence. How do studies by Andreoni and Payne (2003) contribute to understanding the relationship between government spending and private charitable giving, and what are the implications for policymakers?
Analyze randomized field experiments that test the role of reciprocity and social pressure in charitable giving, citing Falk (2007) and Dellavigna-List-Malmendier (2012). Explain how these psychological effects differ from traditional economic incentives and their implications for designing effective fundraising campaigns.
Analyze randomized field experiments that test the role of reciprocity and social pressure in charitable giving, citing Falk (2007) and Dellavigna-List-Malmendier (2012). Explain how these psychological effects differ from traditional economic incentives and their implications for designing effective fundraising campaigns.
Explain the Tiebout model and the conditions required for its successful operation. How does the Tiebout mechanism promote efficiency in the provision of local public goods, and what are the major limitations and criticisms of this model in real-world settings?
Explain the Tiebout model and the conditions required for its successful operation. How does the Tiebout mechanism promote efficiency in the provision of local public goods, and what are the major limitations and criticisms of this model in real-world settings?
In the context of the Tiebout model, explain how local governments can effectively implement tax-benefit linkages to mitigate issues related to redistribution and migration. Detail specific strategies that balance the provision of public goods with the tax burden to prevent adverse selection.
In the context of the Tiebout model, explain how local governments can effectively implement tax-benefit linkages to mitigate issues related to redistribution and migration. Detail specific strategies that balance the provision of public goods with the tax burden to prevent adverse selection.
Assume that the economy has $H$ identical households. Each household h has a utility function $U^h(x^h, G)$, where $x^h$* represents quantity of unit of private good consumed by household h, and G quantity of public good. Let aggregate production be given by $F(X, G) = 0$. Derive and interpret the first-order conditions for the Pareto-efficient level of public good provision.
Assume that the economy has $H$ identical households. Each household h has a utility function $U^h(x^h, G)$, where $x^h$* represents quantity of unit of private good consumed by household h, and G quantity of public good. Let aggregate production be given by $F(X, G) = 0$. Derive and interpret the first-order conditions for the Pareto-efficient level of public good provision.
Analyze the conditions under which majority voting leads to the efficient provision of a public good. Assume households have single-peaked preferences. How does the median voter theorem apply, and what assumptions must hold for the median voter’s preferred level of the public good to coincide with the Pareto-efficient level?
Analyze the conditions under which majority voting leads to the efficient provision of a public good. Assume households have single-peaked preferences. How does the median voter theorem apply, and what assumptions must hold for the median voter’s preferred level of the public good to coincide with the Pareto-efficient level?
Formulate a Lagrangian for the optimal provision of public inputs, considering that public inputs increase firms' productivity. Assume $m$ firms, where the production function of each firm j is given by $y^j=f^j(l^j, G)$, where $l^j$ is labor, $G$ is a public input. Households' utility is $U^h(x^h, l^h)$, where $x^h$ is the private good and $l^h$ is labor. Derive the first-order conditions and interpret the optimal rule. How does the rule change if labor supply is endogenous?
Formulate a Lagrangian for the optimal provision of public inputs, considering that public inputs increase firms' productivity. Assume $m$ firms, where the production function of each firm j is given by $y^j=f^j(l^j, G)$, where $l^j$ is labor, $G$ is a public input. Households' utility is $U^h(x^h, l^h)$, where $x^h$ is the private good and $l^h$ is labor. Derive the first-order conditions and interpret the optimal rule. How does the rule change if labor supply is endogenous?
In the context of Lindahl pricing and personalized prices, specify the conditions under which a Lindahl equilibrium is achieved. How does each consumer’s personalized price relate to their marginal willingness to pay for the public good? Further, detail the informational and practical challenges associated with implementing Lindahl pricing.
In the context of Lindahl pricing and personalized prices, specify the conditions under which a Lindahl equilibrium is achieved. How does each consumer’s personalized price relate to their marginal willingness to pay for the public good? Further, detail the informational and practical challenges associated with implementing Lindahl pricing.
Describe the complexities introduced to the Samuelson condition when public goods are financed via distortionary taxes. Illustrate how the shadow price of public funds ($\lambda$) influences the provision rule. Assuming a utility function where consumers consume both private and public goods, explain how public goods are over or under provided?
Describe the complexities introduced to the Samuelson condition when public goods are financed via distortionary taxes. Illustrate how the shadow price of public funds ($\lambda$) influences the provision rule. Assuming a utility function where consumers consume both private and public goods, explain how public goods are over or under provided?
Explain the Tiebout model and the assumptions required for its perfect functioning, including mobility, information, and number of towns. Further, explain how the model promotes efficiency and what are the main limitations.
Explain the Tiebout model and the assumptions required for its perfect functioning, including mobility, information, and number of towns. Further, explain how the model promotes efficiency and what are the main limitations.
Describe findings from either Andreoni or Falk. How can this inform how local public goods are funded or provided?
Describe findings from either Andreoni or Falk. How can this inform how local public goods are funded or provided?
Suppose there are N families and 2 towns, explain the Tiebout sorting mechanism. How do the rich and poor tend to gather in different cities?
Suppose there are N families and 2 towns, explain the Tiebout sorting mechanism. How do the rich and poor tend to gather in different cities?
Assume that the production possibility frontier is given by $F(X, G) = 0$, where $X$ is the aggregate quantity of the private good and $G$ is the quantity of the public good. Let the individual households' utility functions be represented as $U^h(x^h, G)$, where $x^h$ is the individual consumption of the private good and $G$ is the level of the public good. Suppose the government finances $G$ with distortion of $\Tau$ where $G(q)=H \sum_{i=1}^n t_i x_i$. Derive the modified Samuelson rule under this condition and explain its implications.
Assume that the production possibility frontier is given by $F(X, G) = 0$, where $X$ is the aggregate quantity of the private good and $G$ is the quantity of the public good. Let the individual households' utility functions be represented as $U^h(x^h, G)$, where $x^h$ is the individual consumption of the private good and $G$ is the level of the public good. Suppose the government finances $G$ with distortion of $\Tau$ where $G(q)=H \sum_{i=1}^n t_i x_i$. Derive the modified Samuelson rule under this condition and explain its implications.
Within the framework of the Tiebout model, analyze the impact of inter-community externalities on the efficient provision of local public goods. Consider a scenario where pollution generated in one town affects the environmental quality in neighboring communities. How does this externality affect the Tiebout sorting mechanism, and what policy interventions can restore efficiency?
Within the framework of the Tiebout model, analyze the impact of inter-community externalities on the efficient provision of local public goods. Consider a scenario where pollution generated in one town affects the environmental quality in neighboring communities. How does this externality affect the Tiebout sorting mechanism, and what policy interventions can restore efficiency?
Suppose an economy consists of perfectly altruistic individuals. Discuss the implications for the provision of public goods compared to an economy made up of purely self-interested agents, and how these two contrasting behavioral assumptions affect the equilibrium level of public goods.
Suppose an economy consists of perfectly altruistic individuals. Discuss the implications for the provision of public goods compared to an economy made up of purely self-interested agents, and how these two contrasting behavioral assumptions affect the equilibrium level of public goods.
A public good is provided by a monopolist. Suppose that the monopolist can impose personalized prices for the good. Will the outcome be more or less efficient than if the government were providing the same good. Justify your answer.
A public good is provided by a monopolist. Suppose that the monopolist can impose personalized prices for the good. Will the outcome be more or less efficient than if the government were providing the same good. Justify your answer.
Briefly describe the warm-glow model of giving, and list a scenario where the model is more reasonable versus a scenario that is more appropriate for pure altruism.
Briefly describe the warm-glow model of giving, and list a scenario where the model is more reasonable versus a scenario that is more appropriate for pure altruism.
You are tasked with maximizing the effectiveness of a door-to-door fundraising campaign. How would you use the result s of Dellavigna, Li, and Malmendier to set policy rules? Why would this improve outcomes on average?
You are tasked with maximizing the effectiveness of a door-to-door fundraising campaign. How would you use the result s of Dellavigna, Li, and Malmendier to set policy rules? Why would this improve outcomes on average?
In an economy with heterogeneous agents, how can the government determine who values a public good the most to optimize revenue collection when using personalized prices?
In an economy with heterogeneous agents, how can the government determine who values a public good the most to optimize revenue collection when using personalized prices?
Define the free rider problem with the example of a public park. Elaborate on three mechanisms that private firms can use to overcome it.
Define the free rider problem with the example of a public park. Elaborate on three mechanisms that private firms can use to overcome it.
In the Tiebout model, governments may wish to redistribute resources to the poor within their jurisdiction. What is a problem with this? What implications does this have?
In the Tiebout model, governments may wish to redistribute resources to the poor within their jurisdiction. What is a problem with this? What implications does this have?
A country is debating whether they should subsidize the wealthy or middle-to-lower class for the creation of a public good. Argue for each sides by pointing out both pros and cons.
A country is debating whether they should subsidize the wealthy or middle-to-lower class for the creation of a public good. Argue for each sides by pointing out both pros and cons.
The Tiebout model supposes there is no externalities, and all utility is derived in local jurisdictions. How does an externality in the provision of a local public good change the outcome?
The Tiebout model supposes there is no externalities, and all utility is derived in local jurisdictions. How does an externality in the provision of a local public good change the outcome?
Why do all models of publicly provided goods require government.
Why do all models of publicly provided goods require government.
Lindhal prices provide an elegant theoretical solution to provision of public goods, however they hardly ever exist in reality. Explain a circumstance where these are seen in practice.
Lindhal prices provide an elegant theoretical solution to provision of public goods, however they hardly ever exist in reality. Explain a circumstance where these are seen in practice.
A government provides a public good with an amount decided by majority vote. Suppose that some subset of the population could pay the other off to reduce the amount of the public good. Would this improve social welfare.?
A government provides a public good with an amount decided by majority vote. Suppose that some subset of the population could pay the other off to reduce the amount of the public good. Would this improve social welfare.?
A large amount of experiments test how public goods can be privately provided. Summarize some of the main findings that these have produced.
A large amount of experiments test how public goods can be privately provided. Summarize some of the main findings that these have produced.
How do governments decide which taxes to rely on to raise revenue given the results from Auerbach and Hines.?
How do governments decide which taxes to rely on to raise revenue given the results from Auerbach and Hines.?
In an analysis of taxes versus revenue, what did Shaviro state were an important consideration when choosing between what type to take.
In an analysis of taxes versus revenue, what did Shaviro state were an important consideration when choosing between what type to take.
Briefly explain behavioral economics approach to individuals provision of public goods. In what general way is this different from standard "textbook" provision.
Briefly explain behavioral economics approach to individuals provision of public goods. In what general way is this different from standard "textbook" provision.
Some have argued that, for a variety of reasonable assumptions, it should be thought of as optimal for a government to completely crowd-out private donations to local charities. What would have to be true for this to improve social welfare?
Some have argued that, for a variety of reasonable assumptions, it should be thought of as optimal for a government to completely crowd-out private donations to local charities. What would have to be true for this to improve social welfare?
Briefly describe the results from Falk (2007) in their field experiment and charitable giving. What general lesson should be taken away?
Briefly describe the results from Falk (2007) in their field experiment and charitable giving. What general lesson should be taken away?
What do Dellavigna, List, and Malmendier conclude that economists should now take into account when considering funding? Is social pressure a net positive for public provision or a costly tax?
What do Dellavigna, List, and Malmendier conclude that economists should now take into account when considering funding? Is social pressure a net positive for public provision or a costly tax?
In order, list the most basic components that an individual must have and know in order for the Tiebout to be successful.
In order, list the most basic components that an individual must have and know in order for the Tiebout to be successful.
Briefly explain how the Tiebout result implies that it may be difficult for local level governments in the U.S .to redistribute by listing two reasons.
Briefly explain how the Tiebout result implies that it may be difficult for local level governments in the U.S .to redistribute by listing two reasons.
Flashcards
Free-riding
Free-riding
A situation where rational behavior results in individuals benefiting from a public good without paying for it, hindering efficient allocation.
Samuelson Condition
Samuelson Condition
Optimal quantity of a pure public good where the sum of individual marginal rates of substitution equals the marginal rate of transformation.
Samuelson Condition (Equation)
Samuelson Condition (Equation)
Sum of individual marginal rates of substitution equals the marginal rate of transformation (ΣMRS = MRT).
Public Input Samuelson Condition
Public Input Samuelson Condition
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Lindahl Prices
Lindahl Prices
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Lindahl Equilibrium
Lindahl Equilibrium
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The Tiebout Model
The Tiebout Model
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Distortionary commodity taxes budget constraint
Distortionary commodity taxes budget constraint
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Benefit principle of taxation
Benefit principle of taxation
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Study Notes
- Public goods are non-excludable and non-rivalrous in consumption, leading to market failure
- Free-riding is implied by rational behavior, hindering efficient allocation
- Positive pricing is inefficient because marginal costs are zero
Optimal Provision of Public Goods - The Samuelson Model
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H households have utility function Uh (xh, ..., xh, G)
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Χ₁ = ∑x: private goods i ∈ {1, ..., n}
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G: pure public good
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Production possibility frontier F(X, G) = 0
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Lagrange function: L = U¹ (x¹, G) + ∑ μh [Uh (xh, G) - Ūh] - λF(X, G) h=2
First-Order Conditions and the Samuelson Condition:
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∂L/∂xh = μh ∂Uh/∂xh - λ ∂F/∂Xi, i = 1,..., n (μ¹ = 1)
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∂L/∂G = ∑ μh ∂Uh/∂G - λ ∂F/∂G h=1
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Solving for μh and rearranging yields the Samuelson Condition: ∑ (∂Uh/∂G) / (∂Uh/∂xi) = ∑ MRSiG = MRTiG
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(1) h=1
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The sum of all marginal valuations of the public good, relative to any private good i ∈ {1, ..., n} equals the marginal resource costs of the public good, relative to good i
Optimal Provision of Public Inputs:
- Economy has H households, m firms (index j), and one output good
- Production function: y³ = fi (li, G)
- Public good production: G = θ-1(IG) ⇒ 1G = θ(G)
Market Clearing Conditions:
- ∑ xh = ∑ yj = ∑ fi (lj, G) and ∑ lh = ∑ lj + 1G
h=1
j=1
j=1
h=1
j=1
Optimal Labor Supply and the Samuelson Condition for Public Inputs:
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Lagrange function: L =U¹(x¹, 1¹) + ∑ μh [Uh (xh, lh) - Ūh] + λ [∑ fj (li, G) – ∑ xh] + ρ [∑ lh - ∑ lj - θ(G)] h=2
j h
j -
Optimizing labor supply: ∂Uh/∂lh / ∂Uh/∂xh = ∂fj / ∂lj √h, j
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Samuelson condition: ∑ ∂fj/∂G = ∂fj/∂lj ∂lj/∂G = 1, ..., m
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(2)
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Sum of marginal products in all firms equals opportunity costs
Voting
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In practice, the provision of public goods is determined by voting
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Effective price of the public good is 1/H for each unit
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Utility: Uh (Mh - G/H, G)
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Median voter will be decisive, voter (H+1/2) is denoted by Gm
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The best strategy is to be sincere
Efficiency of Voting Outcome
- Voting equilibrium Gm is realized according to max Um (Mm - G/H, G)
- Leads to MRSM = 1/H
- If G = G* : ∑ MRS¹ = 1 H h=1
Interpretation and Limitations:
- Majority voting leads to efficient provision only if the median voter's MRS equals the mean
- Income distribution affects voting outcomes
- Proportional financing changes the relationship Personalized Prices
- The private market fails because of free-riding
- Efficiency requires aligning social and private benefits through personalized prices
Lindahl (1919): Personalized Prices for Public Goods
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Consumers pay a personalized price based on individual valuation
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Quantity of the public good is the same for everyone, but prices differ
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Adjustment continues until shares are reached at which both wish to have the same quantity
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This point is called the Lindahl equilibrium
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The process works because consumers pay only a share
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Private cost appear lower, demand increases
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Shares can be tailored to be individual
Lindahl Equilibrium:
- Utility given by Uh (Mh - ThGh, Gh)
- First-order condition: UG/UX = Th, h = 1,2
- Summing conditions: UG/UX₁ + UG/UX₂ = MRSC + MRS² = T¹ + T² = 1
- Samuelson condition is fulfilled
Tax Financing
- Following Atkinson and Stern (1974) on distortionary financing
- H identical households
- n private commodities, public good G
- Households budget constraint: qx = 0
Government Budget Constraint:
- H Σtixi = G
- Marginal welfare gain must be weighted against opportunity costs plus deadweight loss
Walras’ Law and the Government Budget Constraint:
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Budget constraint is: F[Hx(q, G), G] = F[X(q, G), G] = 0
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Lagrangian is: L = HV (q, G) – λF[X(q, G), G]
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(3)
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FOC: ∂L/∂G = H ∂V/∂G - λ [∑ FXi ∂Xi/∂G + FG] = 0
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(4)
Optimization and the Numerarie Good
- Competitive producers: FXk = ∂F/∂Xk = Pk
- Divide by optimal consumption choice ∂U/∂xk = αqk
- Evaluate at numeraire good 1 (t₁ = 0, p1 = q1 = 1)
- Use consumer’s budget constraint Σ qidXi/dG = 0
Samuelson Condition with Distortionary Taxation
- MRTG,1 = α/λ [∑ MRSh ] + α/λ[∑ tiXi / ∂G]
- H x MRSG,1
- (5)
Slutsky Equation
α/λ = 1 - ti ∂Xi / ∂I + 1/Xk ti Sik
- (6) i=1
Experiments
Marwell and Ames (1981)
- Nash equilibrium: get everything in cash
- Social equilibrium: contribute everything to public good
- Subjects contibute 50% in lab Crowing out of private contribution by govt provision
- In a simple, standard model government forced contribution crowds out one-to-one private contributions
Charitable giving
Use tax return data on art and social service organization
Dellavigna-List-Malmendier 2012 (Social Experiment)
- Social pressure is an important determinant, that drives behavior and that decreases potential donor utility Likelihood of giving: 12% in control, 14% in treatment 1, 21% in treatment 2 Increased contribution has to do with (altrusim, social pressure, reciprocity (name on building, alumni, …)
Tiebout Theorem (1956): Local Public Goods
Competition will naturally arise because individuals can vote with their feet: if they don’t like the level or quality of public goods provision in one town, they can move to the next town. This threat of exit can induce efficiency in local public goods production. Local govs. Do efficient policies because they need to compete among local residents
The Tiebout model
Tiebout Theorem Part I:
In equilibrium, families will sort themselves in towns according to their taste for public good (1 town with elderly only, 1 town with families with kids only) No 2 families want to exchange location
Tiebout Theorem Part II:
In each town, the level of local public good is efficient (MRS=MC)
- In elderly town, G=0 which is efficient as nobody values G
- In kids town, G is such that UK(Y-G/N, G) is maximzed
Tiebout Model (Centralized vs Decentralized)
local governments do not do any redistribution: individuals receive in local public goods exactly what they are paying in taxes (= benefit principle of taxation) Individuals can choose (through their location choice) their preferred mix of public goods and taxes Individuals can vote with their feet by choosing the locality which fits their tastes and provides the best public goods given the tax.
Consquence of Tiebout model!
Tiebout model leads to a segregation of tastes with associated implications for the level government redistribution It is hard for a local government to redistribute from rich to poor 4) No externalities/spillovers of public goods across towns
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