This paper deals with similarities and differences between new economic sociology (NES) and new institutional economics (NIE). We start with brief reports on the basic ideas of NES and NIE.Regarding the latter, we concentrate on NIE in the sense of Oliver Williamson who introduced the term and whose work became the main target of sociologists' critique. We show that the contrast between the two fields is less sharp than some social scientists might assume. We then present a review and assessment of the attack of seven sociologists on Oliver Williamson's ideas. The sociologists are Perrow, Fligstein, Freeland, Granovetter, Bradach & Eccles, and Powell. Their battering ram "social network theory" is briefly described and an attempt made to combine network analysis with new institutional economics as understood by Williamson, i.e., his transaction cost economics. The paper is concluded with some thoughts on the convergence of NES and NIE.
Introductory RemarksThis paper deals with similarities and differences between the New Economic Sociology (NES) and the New Institutional Economics (NIE). As we shall see, both deal with social actions. What are then the differences between the two fields -the fundamental 1 I benefited from detailed comments by Mark Granovetter, Richard Swedberg, and Oliver E. Williamson.The usual disclaimer applies.ISNIE2001/Revise~2.doc 7/17/01 3 differences that is -or are there essentially none?According to Smelser and Swedberg (1994b, 4) there are considerable differences at least between classical sociology and classical economics:• in sociology actors are influenced by other actors,• in economics actors are uninfluenced by other actors.But at a closer look, the contrast between the two fields is less sharp. Economists since Cournot (1838) know and recognize analytically that "actors are influenced by other actors." But classical economists, being obsessed with the goal of efficiency (Pareto efficiency that is), disliked oligopolies. They do not take them for granted. They wanted to annihilate them politically and to establish in the real world conditions "as if" we would have perfect competition. It is this ideal-typical view of classical economics that has been challenged, among others, by NIE in the sense of Oliver Williamson.A deeper difference between classical sociology and classical economics exists with regard to their respective models of man:• sociologists allow for various types of human action, including rational action;• economists assume only perfect rationality. (Smelser and Swedberg 1994b, 4) More precisely, perfect individual rationality is the fundamental assumption of neoclassical microeconomics. It was challenged by Simon (1957), whose concept of bounded rationality was introduced by Williamson as an important element into his NIE (Williamson 1975). North, in his later work, seems to go even further. He states that "a modification of these [rational choice] assumptions is essential to further progress in the social sciences. The motivation of the actors i...