The bargain begins with the work of assembling the bargainers. The smoke may reach a thousand households before any two of them have spoken; the promise to reduce it must find someone able to speak for those who breathe it. Each household has a different injury, a different income, a different willingness to wait. Some are tenants who will soon leave; some expect to remain for generations. The owner of the chimney can sign a single agreement. The people downwind must decide who may sign theirs, who will pay for the negotiation, and how a promise made today will be enforced tomorrow. A gain from agreement can exist throughout this interval without an agreement existing. The earlier bargain in The Neighbor therefore leaves a second question: what must be done, and what must be spent, before the parties can reach the table at which their interests are supposed to meet?
Transaction costs consume part of the gain that would otherwise make agreement worthwhile. Coase included the discovery of trading partners, the communication of terms, the negotiation and writing of contracts, and the inspection needed to see that promises are kept. These are activities with alternatives: the engineer measuring the smoke, the resident attending the meeting, and the lawyer specifying the limit could each have used the same hour elsewhere. An improvement worth a hundred in benefits and costing eighty to produce leaves twenty available to cover this work; if arranging and enforcing it consumes thirty, that particular route costs more than it creates. The benefit of cleaner air has survived the calculation. The proposed means of securing it has failed the comparison. Fewer parties and clearer measurements may make a bargain cheaper, but neither the number two nor the existence of a deed guarantees success. A single negotiation can be protracted, and a large association can sometimes act through an established representative. The inquiry concerns the costs and powers of the arrangement that actually exists.1
A holdout can obstruct agreement even when the acts of signing and enforcing it are cheap. Suppose a project needs three adjoining plots, each worth thirty to its present owner, and the assembled site will yield a hundred and twenty after every other project cost has been paid. There are thirty of gains to divide. If each owner insists upon forty-five, the combined demand is a hundred and thirty-five and the project cannot pay for itself. Each necessary signature commands a gate through which the entire project must pass. The arithmetic identifies incompatible demands; it supplies no prediction that these demands will persist, and no rule for dividing the thirty. Owners accepting thirty-five apiece would each gain five and leave the assembler fifteen. An owner may also value a home or a view more highly than an outsider estimates, so refusal by itself proves neither deception nor waste. The particular holdout problem arises when a necessary party seeks a larger share of an available joint gain and the attempt to divide that gain prevents its realization.2
The free rider faces a different opportunity: he can enjoy the improvement without supplying the contribution on which its provision depends. A household whose consent is unnecessary to a smoke-reduction agreement may nevertheless breathe the cleaner air once its neighbors have paid for it. This separates the benefit of joining the effort from the benefit of the effort itself. Samuelson's account of collective consumption made the distinction precise: one person's enjoyment of a common benefit need not subtract from another's, while the information needed to choose its level remains dispersed among those who enjoy it. A person asked to finance the benefit has a reason to understate what it is worth to him. The difficulty can survive accurate engineering and clearly assigned rights. Everyone may agree that a filter works while disagreeing about who should purchase it. The holdout charges for a permission that others require; the free rider can receive a benefit even after declining to help provide it. A sufficiently complicated bargain may encounter both.3
Conditional contributions show how the same common benefit can support either provision or failure. Let a filter cost twelve and give each of three households a benefit worth five. Each household may pledge a nonnegative amount; the filter is installed only if the pledges reach twelve, and all pledges are refunded otherwise. Assume each household cares only about its own benefit and payment, and changes its pledge independently. If all pledge zero, no household can make itself better off by changing alone: a pledge below twelve achieves nothing, while paying twelve buys a benefit worth only five. Yet four pledged by each household is also stable. Each then gains one; withdrawing any part of its four would prevent installation and leave it with zero instead, while paying more would reduce its gain. The fifteen of total benefits exceed the twelve of cost in both cases. What differs is the expectation of the other contributions. The example permits a successful bargain and a failure to coordinate under the same preferences, giving a precise reason to examine assurances, representation, and the rules of contribution before declaring that a multitude cannot agree.4
The choice of institution concerns how these obstacles can be reduced at a cost worth bearing. A representative association can economize on repeated meetings; a contingent contract can make one person's promise depend upon the others' promises; a common owner can replace several transactions with an internal decision. A public levy or an emissions rule can reach people whom a voluntary agreement has difficulty gathering. Each arrangement also creates demands of its own: information must be collected, an agent must be controlled, compliance must be observed, and mistaken decisions must be corrected. Coase's comparison includes these costs on every side. It gives no automatic victory to the bargain merely because the rights are clear, or to the public authority merely because bargaining has failed. The emissions market of The Permit makes this especially visible. The trading takes place within an organized system of measurement, entitlement, and enforcement; those services are part of what allows the prices to mean anything.5
The multitude's bargain is worth the improvement it can secure after the costs of organizing it have been counted. Its failure leaves the initial allocation of rights with practical force, since a trade that never occurs cannot revise the result. That allocation also determines who must ask, who can refuse, and who begins with the means to pay. Adding up money-valued gains helps identify an opportunity; it leaves the distribution of those gains and the legitimacy of the underlying claims to be judged. Nor should the name transaction costs become an explanation supplied after every failure: the missing agreement calls for evidence about the obstacle that prevented it. On a crowded road the obstacle takes a particularly immediate form. Each arriving driver delays people whom he will never meet, whose losses occur before any conversation could begin. The Highway asks what price might bring those scattered minutes into the decision that spends them.