Tariff data cover 2005, 2008 and 2009, and are aggregated to the industry detail of the OECD ICIO model, weighting each 6-digit product by its share of bilateral trade in the corresponding industry as reported by the importer. Lastly, the data are aggregated at the country level by weighting with respect to intermediate imports when it comes to backward participation and exports to forward. The weighted average corresponds to a rough measure of the revenue from tariff expressed as a ratio of total trade of intermediates.