ABSTRACTColin Hay's constructivist institutionalism and Vivien A. Schmidt's discursive institutionalism are two recent attempts to theorize ideas as potential explanations of institutional change. This new attention to the causal role of ideas is welcome, but Hay and Schmidt do not take into consideration the constitutive and structural aspects of ideas. Instead they reduce ideas to properties of individual conscious minds, scanting the respects in which ideas are intersubjectively baked into the practices shared by individuals. This aspect of ideas—arguably, the institutional (...) side of ideas—is developed in post-structuralist thought, which therefore demands a place in ideational research. (shrink)