There is no economist who has been more useful to me as a teacher of institutional economics than Douglass North. This is because he is the main provider of a unified and consistent conceptual framework for the study of institutions and their effects. Using the Coasean concept of transaction costs, North understands institutions as the main influence on overall transaction cost levels in specific societies.
North’s starting point is that institutions constrain human behavior, which reduces uncertainty and thereby transaction costs, which in turn explains long-term processes of economic development. And institutions do not only refer to the formal codified rules of the game as embodied in legal and political systems; they also refer to various cultural norms and habits that act as informal constraints on human action. On the basis of this conceptual framework, North studied the comparative institutional frameworks of England, the Netherlands, Spain, and Portugal as a means of explaining the long-run economic performance not only of these societies, but also of their colonial offshoots in North and South America.
The main conclusion of his analysis is that institutions that promote well-defined property rights and free trade generate higher long-term growth than unstable institutions and barriers to economic or political entry that protect a dominant rent-seeking elite. North’s analysis thereby illuminates the “macroeconomic” framework that supplies the rules of the game for firms and other organizations. The organizational analysis of Oliver Williamson and others can thus be seen as the microeconomic counterpart to North’s analysis within the research program that has become known as the New Institutional Economics.
North belongs to a select group of economists whose theorizing is constantly evolving, unlike most economists who keep repeating the same basic theory with few changes except for some minor theoretical or empirical details. It is therefore not the case that the reader of North’s work confronts a situation of rapidly diminishing utility when consuming an increasing quantity of his output. In his early work, the approach is much more neoclassical than later on. After about 1990, North has seemed increasingly disillusioned with the maximizing assumptions of mainstream models. As a result, he has come to rely to an increasing extent on the results of cognitive science and tends nowadays also to refer to the “non-ergodic” economic environment (which brings to mind some of the more heterodox Post Keynesians and Austrians).
He has also recently written about the effects of the long-term evolution of the human brain on economic outcomes, referring repeatedly to the transition from primate to human communities and from pre-literate to textual societies. So while he was always more of a big-picture guy than the average economist, he is perhaps now the biggest-picture economist ever, surpassing even Hayek in this respect (who tended to avoid discussing other primates than homo sapiens).
As an octogenarian, North has yet again developed a new framework for analyzing economic development, this time together with the political scientist Barry Weingast. The main idea is that the state arose to suppress violence among contending groups, and that these contending groups form a sometimes divided elite in what North and Weingast call “limited-access orders.” Such orders are essentially rent-seeking coalitions that enforce limited access to sources of economic and political power (i.e. they exclude most of the population). All states before 1800 and most states today are limited-access orders, which is why North also calls them “natural states.” A few dozen countries are however open-access orders, where the rule of law guarantees more-or-less equal rights to entry into markets and politics for all citizens. Certain preconditions (rule of law for elites; elite organizations with perpetual life; centralized control of violence) have to be met for a limited-access order to make the transition into an open-access order, and these preconditions are not always achieved, nor do they automatically lead to a successful transition. (One might add that even after a successful transition, problems with rent-seeking interest groups and discretionary market distortions may persist, although not solely for the benefit of a small power-wielding elite). All in all, the natural state framework is quite depressing, but nevertheless mostly persuasive.
As should be evident from this brief overview, Douglass North has been a major supplier of intellectual nourishment for the past 50 years.