Welcome to the CGIAR Impact Assessment website

Photo depicting impact of Agricultural Research


SPIA workshops and meetings on the sidelines of AAEA Boston

SPIA is organizing three events during the AAEA 2016 Boston meeting. On July 29th (Fri), a day-long IAFP meeting; and, on July 30th (Sat), a mid-term workshop on the long-term/large-scale studies funded by SPIA. Following the AAEA (July 31st-August 2nd), on August 3rd (Wed) and 4th August (Thurs), SPIA, MSU and PIM are organizing a workshop on recent developments in measuring adoption of agricultural technologies. All event details on this page. We also encourage you to attend lectures and panel discussions by SPIA collaborators during the AAEA: Alain de Janvry (Univ. of Berkeley), Jeff Michler (Univ. of Illinois, session 2074), and Jeff Alwang (Virginia Tech - session 2104 and session 2131) relating to impact assessments in the CGIAR.

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 BMGF, 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, and Antle et al. 2015 is a simulation-based approach to ex-ante IA of WorldFish's integrated agriculture-aquaculture (IAA) program. More details on both studies on the social impacts: poverty and hungerpage.

CGIAR Impact Blog

Mar 2016

An inception workshop was held on March 10, 2016 at IFPRI for four studies funded under SIAC activity 3.3 (under-evaluated areas of CGIAR research): (1) alternate wetting and drying, Philippines; (2) agroforestry, Kenya; (3) brachiaria grass,...

Mar 2016

An oft-discussed issue when it comes to NRM practices (generated from CGIAR research) is what constitutes 'adoption'. While this is a result of the fact that practices are often a combination of recommended management techniques that farmers...


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