Economic Analysis of Law: Property Rights, the Coase Theorem, Contract Incentives, and Efficiency Principles
Law and Economics emerged at the University of Chicago (Aaron Director, Ronald Coase, Richard Posner et al.) in the 1960s–70s. Core claim: legal rules can and should be evaluated and designed using economic efficiency criteria (wealth maximization, Pareto improvement); law changes behavior by influencing parties’ incentive structures.
## The Coase Theorem and Its Legal Implications
**Coase Theorem (1960)**: Ronald Coase’s (1991 Nobel Economics) core argument: when transaction costs are zero, the initial assignment of property rights doesn’t affect the final resource allocation — parties reach efficient outcomes through voluntary negotiation regardless of legal rights assignment. The theorem’s real significance: transaction costs are not zero in reality, so initial rights assignment does matter — law should assign rights to whoever can use them most efficiently (or at least reduce the transaction costs of negotiating to efficient outcomes). [Coase’s original paper “The Problem of Social Cost”](https://www.jstor.org/stable/724810) is a foundational Law and Economics text.
## Contract Law’s Incentive Design
**Why is expectation damages (not specific performance) the common law default remedy?** Law and Economics analysis: specific performance requires actual contract performance; expectation damages give plaintiffs money equivalent to contract performance value. Law economists argue that allowing “efficient breach” — when breach costs (paying damages) are lower than non-breach costs, and the non-breaching party receives full compensation — can increase overall efficiency. This explains why the common law tradition (US, UK) favors monetary damages while civil law traditions (Germany, France) favor specific performance.
