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\bibitem{Sieber_etal2013} Sieber, S., Amjath-Babu, T. S., Jansson, T., M{\"u}ller, K., Tscherning, K., Graef, F., et al. (2013). Sustainability impact assessment using integrated meta-modelling: Simulating the reduction of direct support under the EU common agricultural policy (CAP). \textit{Land Use Policy}, \textit{33}, 235--245.

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