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This report is about setting priorities for health technology assessment (HTA). HTA examines systematically the consequences of the application of health technologies (broadly defined to include any health care intervention) to support decision making in policy and practice. Only a fraction of existing health technologies have been formally evaluated, and many more appear each year. Resources for HTA are, however, limited so that priorities have to be set, whether explicitly or implicitly. The aim of setting priorities for HTA should be to identify those assessments that offer the greatest benefits in relation to their cost, and thus to maximize the benefit derived from investments in HTA.

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Technology is generally defined as "science or knowledge applied to a definite purpose." Technology assessment has been defined as a form of policy research that examines short-and long-term consequences (for example, societal, economic, ethical, legal) of the application of technology. The goal of technology assessment was said to be to provide policy makers with information on policy alternatives. Health technology assessment (HTA) grew out of this field and was developed in the U.S. Office of Technology Assessment (OTA). However, the OTA was closed in 1995. The links between technology assessment and health technology assessment were more-or-less lost after the dissolution of OTA, and few workers in the field of HTA seem familiar with the roots of the field in the more general and social-oriented technology assessment.

For the past several years, we have discussed the idea of producing a publication on the history of health technology assessment (HTA). It seemed important to us to develop this history now, while those who lived it can give their own accounts. An exception is Seymour Perry, the first president of ISTAHC and the Director of the first national public program in HTA, the U.S. National Center for Health Care Technology (NCHCT). See the In Memoriam in this issue.