Economic production is increasingly organized in Global Value Chains, in which there is trade across national boundaries of intermediate goods. This has been most pronounced in manufacturing sectors but is increasingly involving services as well. The blueprints for input production become codified knowledge that is outsourced to different countries. A multisectoral analysis of trade provides the focus of this afternoon seminar, including both theoretical and empirical approaches. Several of the presentations will report recent work using the World Input-Output Database, which includes national tables with interlinking trade flows.