Dual estimates of conditional quantiles of specific costs and gross margins: application to European regions[Estimations duales des quantiles conditionnels de coûts spécifiques et de marges brutes : application aux régions européennes]

This communication presents innovative practices for regionalised estimation and structural analysis of specific costs for wheat, based on the European Farm Accountancy Data Network (FADN). In the conduct of public policies, it is necessary to generate not only the central estimates of the distribution of the parameter of interest but also the lower or upper quantiles to select appropriate regulatory thresholds. Taking I ,nto account the individual heterogeneity and asymmetry of farm specific costs, this paper introduces methodologies for estimating specific costs in conditional quantiles, dual estimation of gross margins and pseudo-barycentric imputation of partial estimates. The projection of additional elements on factorial graphs allows an analysis of changes of scale, from national to regional or structural, by the comparative study of results. In order to test its relevance, this innovative procedure is applied to the estimation and analysis of specific costs and gross margins for the regions of the main wheat producing countries in the European Union based on the FADN in 2006.