WWF-UK wishes to appoint a consultant or consortium to undertake a scoping study to identify options for modelling the potential global socio-economic impacts of future changes in biodiversity and ecosystem services. This scoping study is a key part of Phase 1 of a new project initiated by WWF, the overall aim of which is to help strengthen the evidence base on the potential global socio-economic impacts of future changes in biodiversity and ecosystem services. The ambition is that, in doing so, the project will help to justify and secure stronger policy commitment and investment towards the protection, improvement and sustainable use of the world’s critical natural systems, particularly in the run-up to the forthcoming international policy discussions in 2020. This scoping study (which will run until June 2017) seeks to identify the current state-of-play in international environment-economy modelling/research, and to identify what new modelling and/or analyses should be prioritised to fill key evidence gaps. It will also identify recommendations to help inform the development of a strategy for taking forward such work in Phase 2c.