Quantitative models are necessary tools to represent the extremely complex interrelationships between agricultural activities and their environmental and socioeconomic consequences. It is a well-established fact that reactions to policy intervention on bio-natural and socioeconomic structures are rarely satisfactorily explainable or predictable on the basis of simple intellectual constructions. This contribution provides a review and assessment of different types of applied modeling allowing for informed discussion. A global framework is drawn up for market structures and policy...