It includes cost of public stockholding related to market interventions (intervention storage) and storage of strategic reserves (stockholding for food security purposes, state reserves). This category does not include public expenditure related to export subsidies or buying into intervention stocks. In such cases all efforts should be made to get more information concerning the implementation of the policy which will allow classifying in the categories mentioned above. Changes between the 2013 and 2014 editions reflect two factors: a) changes in the methodology, and b) data improvements facilitated by the clarification of definitions. In addition, the estimates in the 2014 report contain updated information across all agriculture support categories, in particular for recent years.