Despite Decline in Share of Global Output, U.S. Science Impact Still Strong, Says Thomson Reuters

    PHILADELPHIA and LONDON, Jan. 28 /CNW/ -- The Scientific business of
Thomson Reuters today announced the results of a study showing that the United
States' share of scientific research output continues to shrink while
Asia-Pacific's share of output rises.  Nevertheless, the U.S. retains a
healthy footing globally in the relative impact of its research.

    In its January/February issue of Science Watch, Thomson Reuters analyzes
12 year's worth of data from its National Science Indicators database to
determine the U.S.'s global scientific influence based on the nation's
research output and impact.

    In 2005, Science Watch noted that the U.S.'s output, as a percentage of
world science, was in decline, with Asia-Pacific's output steadily rising. 
This latest analysis shows the trends continuing.  In 2005, the U.S.
contributed 32.8 percent of global research; by 2007 its share slid to 31.5
percent.  During the same period, Asia-Pacific's share increased from 25.9
percent to 28.2 percent.

    "It is important to note that measuring scientific output is only one way
to measure a country's influence in the sciences," said Christopher King,
editor of Science Watch.  "Because citations are an acknowledgement of
intellectual debt, we also evaluate a country's citation impact.  The U.S.'s
citation impact has remained strong in the major science fields."

    In all 21 science fields analyzed for this report, the U.S. markedly
surpassed the world average in citation impact.  Topping the list was Physics,
where the U.S. exceeded the world mark by 55 percent, followed by Chemistry
and Materials Science where the U.S. exceeded the world by 52 percent and 47
percent, respectively.

    For more information about U.S. research output and impact, including
expert analysis, visit

    About Thomson Reuters
    Thomson Reuters is the world's leading source of intelligent information
for businesses and professionals.  We combine industry expertise with
innovative technology to deliver critical information to leading decision
makers in the financial, legal, tax and accounting, scientific, healthcare and
media markets, powered by the world's most trusted news organization. With
headquarters in New York and major operations in London and Eagan, Minnesota,
Thomson Reuters employs more than 50,000 people in 93 countries. For more
information, go to


For further information:

For further information: Sue Besaw, Scientific, +1-215-823-1840, Web Site:

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