The '''Coase theorem''' states that if property rights are well-defined and [[transaction costs]] (including costs of negotiating) are zero or negligible, then the most efficient or [[Pareto optimal]] economic activity will occur regardless of who initially owns the property rights. Negotiation and market transactions will ensure optimal allocation of property. | The '''Coase theorem''' states that if property rights are well-defined and [[transaction costs]] (including costs of negotiating) are zero or negligible, then the most efficient or [[Pareto optimal]] economic activity will occur regardless of who initially owns the property rights. Negotiation and market transactions will ensure optimal allocation of property. |