This brief report lays out ten theories of advocacy and policy change. These theories are intended to articulate the policy making process and identify causal connections supported by research to explain how and why a change may or may not occur. It further provides examples of the way in which advocates, funders, and evaluators can use these theories in their work.

Rural extension is a process of work and accompaniment with the producer aimed to sustainable development of their skills. In Mexico, a series of extension models have been adapted, that goes from the US, implemented in the early 1980’s, to the hub model or innovation node (platform - demonstration module - extension area) applied since 2010 under the MasAgro Program. The aim of this paper is to analyze the various processes of extension in Mexico.