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  • 1 SciTech Strategies, Inc. Berwyn PA 19312 USA
  • | 2 Sandia National Laboratories Albuquerque NM USA
  • | 3 SciTech Strategies Inc. Albuquerque NM USA
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This paper introduces a new method for evaluating national publication activities. This new indicator, thought leadership, captures whether the nation is a thought leader (building on the more recently cited literature for that field) or follower (building on the older cited literature for that field). Publication data for 2003 are used to illustrate which nations tend to build on the more recent discoveries in chemistry and clinical medicine. Implications for national and laboratory policy are discussed.