Microeconomic Theory and Efficiency in Law and Economics

Flashcards testing core concepts of microeconomic theory, efficiency metrics (Pareto and Kaldor-Hicks), sources of inefficiency, positive vs. normative economics, and legal application theories from Law and Economics.

What do economists mean by rational behavior or rationality?

Behavior that is consistent with an individual having well-defined, consistent preferences, understanding their options, and optimizing by choosing the option they like best.

What is the principle of revealed preference?

The assumption that when an individual chooses an option, they prefer it over their available alternatives, allowing economists to infer preferences from observed choices.

How is a Pareto improvement defined?

Any change to the economy that leaves everyone at least as well off and at least one person strictly better off.

When is an outcome considered Pareto superior to (or Pareto dominating) another?

An outcome is Pareto superior if moving to it from the initial state constitutes a Pareto improvement.

Who formulated the concept of Pareto efficiency, and what were his years of life?

Vilfredo Pareto ($1848$–$1923$).

Why is the Pareto criterion generally not useful for evaluating legal systems or new laws?

Because most new laws create both winners and losers, and the Pareto criterion cannot evaluate policies where anyone is made worse off.

How is an individual's economic value for a good defined?

Value is measured by the individual's willingness to pay, defined as the precise monetary amount that makes them indifferent between having the good and having that amount of money.

What is an informal definition of a Kaldor-Hicks (K-H) improvement?

Any change to the economy that increases the total value achieved by everyone in society, measuring value by individual willingness to pay.

How is a Kaldor-Hicks improvement defined in relation to a Pareto improvement?

A change to the economy is a Kaldor-Hicks improvement if it could be turned into a Pareto improvement through monetary transfers (also called a potential Pareto improvement).

How do Kaldor-Hicks improvements differ from Pareto improvements regarding winners and losers?

A Kaldor-Hicks improvement can create losers, provided the gains to the winners exceed the losses to the losers, representing a net creation of total value.

In the neighbor party example, why is throwing a party a Kaldor-Hicks improvement if it makes the host $50$ better off, $30$ guests $5$ better off each, and a neighbor $100$ worse off?

Because the total social benefits outweigh the total social costs, creating net total surplus: $50 + (30 \times 5) - 100 = 100 > 0$.

When is an economic situation or state defined as efficient under Kaldor-Hicks criteria?

A situation is efficient when no available Kaldor-Hicks improvements remain, meaning there is no way to make some people better off without making others worse off by a greater amount.

How do Ellickson, Posner, and Polinsky define economic efficiency?

Ellickson defines it as minimizing the sum of transaction costs and deadweight losses; Posner defines it as "wealth maximization"; and Polinsky describes it as corresponding to "the size of the pie" (whereas equity is how it is sliced).

Why can individual rational choices lead to socially inefficient outcomes?

Individuals optimize based on private benefits and private costs rather than total social benefits and total social costs when their actions impact others.

What is "The Tragedy of the Commons" described by Hardin ($1968$), and who won a Nobel Prize for studying solutions to it?

It is the overexploitation of communal resources caused by individuals ignoring negative externalities; Elinor Ostrom shared the $2009$ Nobel Prize in Economics for studying how societies solve common-pool resource problems.

How do negative and positive externalities affect economic efficiency?

Without regulation, activities causing negative externalities occur more than the efficient amount, while activities creating positive externalities occur less than the efficient amount.

What is the concept of "internalization" in legal design?

Designing legal rules to eliminate externalities so that individual choices account for full social costs and benefits, leading to efficient outcomes.

How do trade embargoes or sales prohibitions create economic inefficiency?

They prevent voluntary, mutually beneficial trades between willing buyers and sellers, stopping potential gains from trade from being realized.

Why do income taxes cause inefficiency in labor decisions?

Income taxes create a wedge between private pre-tax earnings and after-tax pay, preventing employment agreements even when the total value generated by work exceeds the value of leisure time.

Why does monopoly pricing lead to economic inefficiency (deadweight loss)?

Monopolists set price above marginal cost, causing deadweight loss because customers willing to pay more than marginal cost but less than monopoly price are unable to trade.

What is the distinction between positive and normative statements in economics?

Positive statements are descriptive facts or theoretical predictions about "what is," whereas normative statements involve value judgments about "what ought to be."

What three reasons does David Friedman give in Law's Order for evaluating legal rules based on economic efficiency?

$(1)$ Efficiency matters a lot to most human beings; $(2)$ considerable parts of the legal system can be explained as tools to generate efficient outcomes; and $(3)$ economists possess the technical tools to determine which rules lead to efficient outcomes.

Why can economists ignore the direct effect of pure monetary transfers when evaluating efficiency?

Because pure monetary transfers between parties change distribution without directly affecting total value or social surplus; analysis focuses instead on how transfers alter incentives.

According to Steven Landsburg, what two main benefits come from emphasizing efficiency in policy analysis?

Emphasizing efficiency forces analysts to concentrate on the most important problems and forces policymakers to be honest about their true goals.

What is Richard Posner's ($1980$) ex-ante consent argument for using efficiency in legal adjudication?

The idea that before knowing their future role (e.g., driver vs. pedestrian), rational individuals would unanimously consent ex-ante to the most efficient legal rule because it maximizes expected payoffs.

What are two major limitations or criticisms of Posner's efficiency norm?

$(1)$ It relies on the assumption of risk neutrality (equal marginal utility of income); and $(2)$ as noted by Hammond ($1982$), efficiency is a special case of utilitarianism that measures value purely by willingness to pay.

Why is economic efficiency distinct from maximizing happiness according to Posner's pituitary extract example?

Efficiency measures value strictly by willingness and ability to pay; thus, selling extract to a rich family for a few extra inches creates higher economic "value" than selling it to a poor family to prevent dwarfism, despite the latter generating greater happiness.

What four reasons do Cooter and Ulen give for using the tax system rather than the legal system to redistribute wealth?

$(1)$ Taxes target rich and poor more precisely; $(2)$ distributional effects of legal changes are harder to predict; $(3)$ lawyers are more expensive than accountants; and $(4)$ broad-based taxes cause less distortion than narrowly-targeted legal rules.