Isomorphism (sociology)

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In sociology, an isomorphism is a similarity of the processes or structure of one organization to those of another, be it the result of imitation or independent development under similar constraints. The concept of institutional isomorphism was primarily developed by Paul DiMaggio and Walter Powell. The concept appears in their 1983 paper The iron cage revisited: institutional isomorphism and collective rationality in organizational fields.^[1] The term is borrowed from the mathematical concept of isomorphism.

Isomorphism in the context of globalization, is an idea of contemporary national societies that is addressed by the institutionalization of world models constructed and propagated through global cultural and associational processes. As it is emphasized by realist theories the heterogeneity of economic and political resource or local cultural origins by the micro-phenomenological theories, many ideas suggest that the trajectory of change in political units is towards homogenization around the world. Policy convergence is another example of isomorphism across nation states, for example in the European Union where states harmonise policies driven by structural pressures such as directives, regulations, cohesion funds and collaboration mechanisms.^[2] This is in contrast to theories of policy transfer or diffusion which generally give more agency to states in adopting policies.^[2]