The Role and Limitations of Quasi-Linear Preferences in Externality Models
The assumption of quasi-linear preferences is fundamental to diagrammatic analyses of externalities, such as in the Weevokil model, because it ensures the marginal external cost (MEC) is independent of the parties' wealth. This stability prevents the Marginal Social Cost (MSC) curve from shifting with compensatory payments, which is critical for identifying a single, unique Pareto-efficient level of output. While this uniqueness is a direct result of the quasi-linearity assumption, the broader conclusion that a firm's private output choice is Pareto-inefficient holds true even in more general models that do not rely on this assumption.
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CORE Econ
Ch.10 Market successes and failures: The societal effects of private decisions - The Economy 2.0 Microeconomics @ CORE Econ
The Economy 2.0 Microeconomics @ CORE Econ
Introduction to Microeconomics Course
Learn After
Graphical Representation of the Banana Market with Negative Externalities (Figure 10.3)
Effect of Quasi-Linearity on Payoff Maximization and Marginal Costs
Marginal External Cost in a General Utility Model
Generality of the Constrained Choice Method for Finding Pareto-Efficient Allocations
Evaluating a Modeling Assumption for Environmental Policy
Independence of Marginal External Cost from Wealth under Quasi-Linearity
Stability of the Marginal Social Cost Curve under Quasi-Linearity
Applying and Testing Concepts of Quasi-Linearity in Externality Models
An economist is modeling a negative externality where a chemical plant's pollution harms a downstream fishery. To simplify the analysis, the economist assumes the fishery owners have quasi-linear preferences. What is the most significant analytical consequence of this assumption for finding the single, socially optimal level of chemical production?
In economic models of externalities, the conclusion that a competitive firm's profit-maximizing output level is Pareto-inefficient is only valid if one assumes the affected parties have quasi-linear preferences.
Impact of Wealth Transfers on Social Cost Curves
In the context of modeling economic externalities, match each concept or assumption with its most accurate description.
The Trade-off of Simplicity in Externality Modeling
A key analytical simplification in externality models is the assumption of quasi-linear preferences. This assumption implies that an individual's willingness to pay to avoid a marginal unit of an externality does not change with their level of ____, which in turn prevents the social cost curve from shifting when wealth is redistributed.
Arrange the following statements into a logical sequence that explains why the assumption of quasi-linear preferences is useful for identifying a single, unique efficient outcome in a diagrammatic model of an externality.
Evaluating a Uniform Policy Recommendation
An economist is analyzing the negative externality of a factory's air pollution on a nearby residential community. Through surveys, the economist discovers that as the community's average household income increases, their collective willingness to pay for a one-ton reduction in emissions also increases. What is the primary implication of this finding for a standard graphical model that assumes quasi-linear preferences to identify a single, efficient level of production?