Coase Theorem
The Coase Theorem, proposed by economist Ronald Coase, addresses the optimal allocation of resources in the presence of externalities. The theorem states that if property rights are well-defined and transaction costs are zero or negligible, resources will be allocated efficiently through market transactions regardless of the initial distribution of property rights. In other words, under these conditions, the market mechanism can resolve externality issues and achieve Pareto optimality. However, in reality, transaction costs are often significant, making the Coase Theorem more of a theoretical benchmark than a practical solution.