Welcome to the CGIAR Impact Assessment website

Photo depicting impact of Agricultural Research


New publication: DIIVA project book

Edited by Tom Walker and Jeff Alwang, Crop Improvement, Adoption and Impact of Improved Varieties in Food Crops in Sub-Saharan Africa (CABI) is the result of a major follow-up effort on the Evenson and Gollin baseline. Funded by the Bill and Melinda Gates Foundation, DIIVA greatly advanced our knowledge of varietal adoption and diffusion in SSA. You can purchase the book from the CABI site or read the PDF on the IMPACT website here.

Recent publications

With the objective of broadening and deepening the evidence base on the impact of agricultural research on the goals of the CGIAR, SPIA funded three impact assessment case studies in 2011. These studies were completed between 2011 and 2013, and final reports (post external review) are now available: Raitzer et al. 2015 assesses the degree to which post-1989 modern varieties of rice have led to (among others) increased agricultural productivity, food security, and environmental benefits in Bangladesh, Indonesia and the Philippines, and Antle et al. 2015 is a simulation-based approach to ex-ante impact assessment of WorldFish's integrated agriculture-aquaculture (IAA) program. More details on both studies on the social impacts: poverty and hungerpage.

The evaluation report on CGIAR irrigation and water management research IAs, and associated Impact Brief (#49) is now available. Briefs based on two studies documenting the impact of improved maize varieties on household well-being and overall rural poverty in Ethiopia, and the impact of improved common bean varieties on field-level yields, costs of production, and household farm incomes in Rwanda and Uganda are now out.

The underlying studies are related to work on adoption of 20 food crops across 30 countries in Sub-Saharan Africa, data for which was collected as a part of the Diffusion and Impact of Improved Varieties in Africa (DIIVA) project. DIIVA publications include the Impact Brief No. 42, and the Synthesis ReportWe also recommend the Impact Brief on impacts of legumes research in the CGIAR (#44) and synthesis report. Finally, a report from the workshop on impact assessment of policy-oriented research (POR) jointly sponsored by IFPRI, PIM, and SPIA was published in December 2015, and is available on the PIM website here

CGIAR Impact Blog

Oct 2015
Through a funded collaboration with the University of the Illinois at Urbana-Champaign and ICRISAT, SPIA organized a workshop on “Advanced Methods in Impact Assessment” on ICRISAT campus, Nairobi (Kenya) between 21st and 25th September, 2015. The...
Feb 2015

In 2014, we directed you to the 3ie database of impact evaluations. Here is another - the American Economic Association's registry for RCTs - one (...


Illustrative photo

Significant publications of ex post impact assessments (epIAs), both commissioned by SPIA and CGIAR Centers and CRPs showcasing a range of methodological approaches and impacts.

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Map image - click to view publications


ex post Impact Assessments (ex post IAs) of research activities of the CGIAR mapped geographically, with filters for System Level Outcomes (SLOs) and types of research activities. View the map

Strengthening Impact Assessment in the CGIAR (SIAC)

SIAC is a major new initiative from SPIA funded by DFID, the Gates Foundation, and ISPC with a budget of US$ 12 million over 2013-2016 for a range of activities. The key objectives of SIAC are:

  • Methods: Develop, pilot and verify innovate methods for collection and assembly of diffusion data
  • Outcomes: Institutionalize the collection of diffusion data needed to conduct critical CGIAR impact evaluations
  • Impacts: Assess the full range of impacts from CGIAR research
  • Building a community of practice: Support the development of communities of practice for ex post impact assessment within the CGIAR and between the CGIAR and the development community more broadly

Diffusion and Impacts of Improved Varieties in Africa (DIIVA)

There are three major components to this outcomes and impact study which is supported by a 3-year, US$3 million grant from the Gates Foundation.

  • To describe investments in and uptake of crop genetic improvement in priority country-by-commodity combinations in Sub-Saharan Africa (SSA)
  • To verify and gain a deeper understanding about the adoption and diffusion of new varieties in a nationally representative setting of selected priority countries and food crops in SSA
  • To gain a more comprehensive understanding of the impact of crop improvement on poverty, nutrition and food security