Approaches to impact evaluation (assessment) in agricultural information management: Selective review of the issues, the relevant literature and some illustrative case studies. By Margaret Bellamy, November 2000. CTA Technical Centre for Agricultural and Rural Cooperation ACP-EC. CTA Working Document Number 8021. 35 pages. Section headings: Introduction; The role of evaluation in the development process; Who needs to evaluate the impact of information; What is impact evaluation or impact assessment; Rationale for impact assessment; Appropriate methodologies; Impact assessment in information science; Impact studies in ''information for development'; Case studies; Conclusions; References, Case studies. "This review examines the background to impact evaluation and its application, as indicated in the literature of a range of disciplines, and why it is needed, in general terms and more specifically in agricultural information. It comments on the value and relevance of the methodology so far available, and the findings of relevant case studies, to seek lessons and guidelines for future evaluation or impact studies in CTA..." (Posted 20/01/02) For copies try contacting matsangaise@cta.nl or guiot@cta.nl at CTA