Public institutions establish agrarian and rural policies aimed at improving the economic conditions of farmers. Through these policies farmers may receive funds to modernize their farms, to move from traditional agricultural products to new ones, to start non-agricultural economic activities on the farm, etc. These measures regulate the conditions that must be met by the candidates, the productive changes they must introduce, and the amount granted by the institutions to those eligible. With these measures, the institutions exercise their power influencing the decision making of farmers. Thus, the conditions established for obtaining economic support lead to the introduction of criteria differentiating between farmers, and the definition of the changes to be introduced indicate the model of agriculture sought by the institutions.