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The newest “new institutionalism,” discursive institutionalism, lends insight into the role of ideas and discourse in politics while providing a more dynamic approach to institutional change than the older three new institutionalisms. Ideas are the substantive content of discourse. They exist at three levels—policies, programs, and philosophies—and can be categorized into two types, cognitive and normative. Discourse is the interactive process of conveying ideas. It comes in two forms: the coordinative discourse among policy actors and the communicative discourse between political actors and the public. These forms differ in two formal institutional contexts; simple polities have a stronger communicative discourse and compound polities a stronger coordinative discourse. The institutions of discursive institutionalism, moreover, are not external-rule-following structures but rather are simultaneously structures and constructs internal to agents whose “background ideational abilities” within a given “meaning context” explain how institutions are created and exist and whose “foreground discursive abilities,” following a “logic of communication,” explain how institutions change or persist. Interests are subjective ideas, which, though real, are neither objective nor material. Norms are dynamic, intersubjective constructs rather than static structures.
Vivien A. Schmidt (2008) studied this question.