Tribute to Luigi Solari / Richard Stone -- The scientific work of Luigi Solari / J.-N. Du Pasquier and E. Rossier -- Econometric model building for the Common Market / A. Barten -- A nonlinear expenditure system : qualitative analysis and experiments with Canadian data / F. Carlevaro -- A general approach for estimating econometric models with incomplete observations/ M.G. and D.L. Dagenais -- Dynamic misspecification and serial correlation / P. Balestra -- Estimating revealed preferences in models of planning behaviour / A.J. Hughes Hallett and J.-P. Ancot -- Recent experiences with the Qualiflex multicriteria method / J.-P. Ancot and J.H.P. Paelinck