This impact assessment study required a detailed analysis of crop-livestock project inputs, outputs and outcomes. It included impact pathway analysis and impacts were assessed for both the Tibetan Autonomous Region of the Peoples’ Republic of China and Australia. The analysis included quantitative estimates of the return on investment. An impact assessment framework was constructed using best practice. Outputs were grouped into technologies, scientific knowledge, capacity and policy knowledge. Adoption pathways were described, outcomes and intermediate impacts were assessed and final impacts quantified. Care was taken in describing a realistic counter-factual that accounted for investment in research and extension from other sources. Final impacts assessed included scientific impacts, capacity building impacts, social impact, environmental impact and economic impacts. Economic impacts were quantified using a standard welfare (economic surplus) model, as described in Alston et al. (1995). The project was completed by Michael Clarke with methodological assistance provided by Dr John Mullen. The report can be accessed at www.aciar.gov.au/publication/ias88