Historical institutionalism, a social science method of inquiry that uses institutions as subject of study in order to find, measure and trace patterns and sequences of social, political, economic behavior and change across time and space
New Institutionalism is often contrasted with "old" or "classical" institutionalism, the latter of which was first articulated in the writings of John Dewey, Thorstein Veblen, John Commons, and others, and which has been further extrapolated by various philosophers and scholars such as Donald Davidson, Richard Rorty, Amartya Sen, Donald McCloskey, Warren Samuels, Daniel Bromley, E. J. Mishan, Yngve Ramstad, and others.
Social rule system theory was formulated in the 1980s by Burns and Helena Flam together with others was a contribution to the New Institutionalism.
Powell is widely known for his contributions to institutional analysis, beginning with his article with Paul DiMaggio, "The Iron Cage Revisited: Institutional Isomorphism and Collective Rationality in Organizational Fields" (1983) and their subsequent edited book, The New Institutionalism in Organizational Analysis (1991).