Policy Impact Assessment / Maria Blanco -- Positive Mathematical Programming / Filippo Arfini, Michele Donati, Roberto Solazzo and Mario Veneziani -- Modelling Farm-level Adaptations Under External Shocks / Shailesh Shrestha and Bouda Vosough Ahmadi -- Farm-level Modelling, Risk and Uncertainty / Stephen Ramsden and Paul Wilson -- Modelling Farm-level Biosecurity Management / Arnaud Rault and David A. Hennessy -- Modelling Farm Efficiency / Patrick Gillespie, Fiona Thorne, Thia Hennessy, Stephen Hynes and Cathal O'Donoghue -- Quantifying Agricultural Greenhouse Gas Emissions and Identifying Cost-effective Mitigation Measures / Michael MacLeod and Vera Eory -- Moving Beyond the Farm: Representing Farms in Regional Modelling / Jinxiu Ding, Bruce A. McCarl and Weiwei Wang -- Farm-level Microsimulation Models / Cathal O'Donoghue -- Scaling Up and Out: Agent-based Modelling to Include Farmer Regimes / Andrew P. Barnes, Eleonore Guillem and Dave Murray-Rust -- Catchment-level Modelling / Joana Guimar鋋es Ferreira, Patrick Abbot and Andrew P. Barnes -- Modelling Food Supply Chains / Cesar Revoredo-Giha -- Linkage of a Farm Group Model to a Partial Equilibrium Model / Alexander Gocht, Pavel Ciaian, Maria Espinosa and Sergio Gomez y Paloma -- Conclusions: The State-of-the-art of Farm Modelling and Promising Directions / Thomas Heckelei.