CCSI was contracted to write the extractive industries section of the World Bank Diagnostic Trade Integration Study (DTIS) for Tanzania. The study identifies the internal and external trade constraints that hinder the development of the priority sectors, and provides policy recommendations on how these obstacles can be overcome. The Government of Tanzania asked the World Bank to focus the 2017 DTIS update on value addition in extractive industries, agriculture and tourism. Within the extractive industries section, the trade constraints along the mining and gas sector value chains are outlined. Recommendations are provided as to how the Government can increase the upstream and downstream value addition to existing and forthcoming extractive industry projects.