I: Reflecting on Methodology -- 1. Tribute to Luigi Solari -- 2. The scientific work of Luigi Solari -- II: Modelling -- 3. Econometric model building for the Common Market -- 4. A nonlinear expenditure system: Qualitative Analysis and Experiments with Canadian Data -- III: Estimating -- 5. A general approach for estimating econometric models with incomplete observations -- 6. Dynamic misspecification and serial correlation -- IV: Programming -- 7. Estimating revealed preferences in models of planning behaviour -- 8. Recent experiences with the Oualiflex Multicriteria method.