Trends in European practice that relate to qualitative assessment in the evaluation of the impact of research and innovation are discussed and analyzed. To date, European evaluations have been mainly concerned with quality and direct impact with few assessments of medium- or long-term impact. (SLD)

Strengths and weaknesses of three types of semiquantitative methods used by the federal government in research impact assessment are presented, and examples of their use are reviewed. These include the classic retrospective method, another retrospective approach, and accomplishments books used by selected research-sponsoring organizations. (SLD)

This article reviews the principal methods economists and cost benefit analysts use in evaluating research. Two common approaches are surplus measures (combinations of consumer and producer surpluses) and productivity measures. Technical difficulties and political and organizational constraints are discussed for these measures. (SLD)

Articles in this special issue deal with the assessment of the impact of research and are divided into segments concerning semiquantitative approaches; qualitative approaches; and quantitative and fiscal approaches. These articles illustrate the importance of the role of motivation and associated incentives. (SLD)

Theory behind modern evaluative bibliometric techniques is reviewed at three levels: (1) policy application; (2) strategic analysis; and (3) tactical analysis. New techniques developed at each level and limitations of each approach are discussed. At all levels, the process begins with assembling data and then moves to a data-based evaluation. (SLD)