Diffusion: Affect of an organization on institutional structure or decision making mechanism of another organization. 

Diffusion can be defined as the impact of an organization on other organizations. It can be through various actors and instruments. In order to be able to talk about diffusion, first of all, there must be a stimulus, an organization to be taken as a model. Second, there must be an issue or a problem. The actors involved would like to learn from the policies of the organization that they consider to be the stimulus.