All data are processed starting from the aggregation level at which they are supplied, and are aggregated or disaggregated using mappings towards the lowest aggregation level that MAGNET uses. This implies that for example tariff data is considered at the HS6 digit level and aggregated (weighted averages) according to the chosen commodity aggregation scheme for a particular study. Input and output prices are endogenously determined by the markets so as to achieve supply and demand equilibrium.