Transaction Costs, Trust and the Structuring of Markets

This article examines the institutional arrangements that develop when the risks of opportunism and other contributors to transaction costs are high but transactions are nevertheless necessary for economic efficiency. Williamsons famous distinction between markets and hierarchies is inadequate because under certain circumstances markets may be hierarchies that are deliberately managed to reduce levels of transaction costs and undertake strategic objectives to improve their competitiveness with other hierarchies, including other markets. As transaction costs are production costs for these markets, careful management increases the efficiency of the markets. As a result, some important markets are also hierarchies that are structured in ways that are analogous to firms precisely in order to reduce their costs of operation, including the transaction costs that arise from using them.The empirical focus of the article is on the evolution of the membership rules of stock exchanges, a select but important group of markets that have been consciously constructed over long periods and with frequent modifications because of environmental change and learning by participants. Stock exchanges belong to a category that also includes insurance exchanges such as Lloyds, and various markets involving shipping and world trade. These are markets in which the use of up-to-date information is especially important because conditions may alter quickly and in which risk, uncertainty, and the potential for opportunistic behaviour are factors that affect their operations in significant ways. Their productivity as markets is (or historically has been) so high that their replacement by hierarchies is virtually unthinkable because they allow for exchanges that could not otherwise be accomplished smoothly. As a result, when transaction and agency costs arise in such markets, responses have concentrated on finding mechanisms for reducing them to tolerable levels rather than on abandoning transactions altogether through the internalization of activities.