This article focuses on the diffusion and adoption of innovations in clinical practice. The authors are specifically interested in underresearched questions concerning the latter stages of the creation, diffusion, and adoption of new knowledge, namely: What makes this information credible and therefore utilized? Why do actors decide to use new knowledge? And what is the significance of the social context of which actors are a part? This article first appeared in Health Care Management Review, 27(3), 35-47.