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FIELD RANKINGS FOR SWEDEN, 1999-2009, BY RELATIVE CITATION IMPACT

Rank Field Papers Citations Citations/ Paper World Cites/Paper % +/- 1 Computer Science 3,307 24,493 7.41 3.45 +115 2 Agricultural Sciences 2,238 24,028 10.74 6.73 +60 3 Environment/Ecology 7,601 122,456 16.11 10.70 +51 4 Plant/Animal Sciences 9,880 110,534 11.19 7.49 +49 5 Chemistry 14,881 217,415 14.61 10.61 +38 5 Engineering 10,723 65,588 6.12 4.43 +38 7 Clinical Medicine 47,643 823,668 17.29 12.63 +37 8 Pharmacology 3,384 52,972 15.65 11.80 +33 9 Mathematics 3,004 13,055 4.35 3.34 +30 10 Physics 14,583 166,163 11.39 8.82 +29 11 Geosciences 5,010 59,470 11.87 9.39 +26 12 Materials Science 6,451 50,200 7.78 6.44 +21 13 Space Science 2,243 36,784 16.40 14.10 +16 14 Biochemistry 13,667 263,730 19.30 17.04 +13 14 Microbiology 3,141 55,240 17.59 15.60 +13 16 Economics/Business 2,702 16,993 6.29 5.72 +10 16 Molecular Biology 5,751 162,515 28.26 25.63 +10 18 Neurosciences 7,438 154,978 20.84 19.07 + 9 19 Psychiatry/Psychology 3,494 37,374 10.70 10.74 0 20 Immunology 4,456 77,411 17.37 21.50 -19 SOURCE: Thomson Reuters Essential Science Indicators, January 1999–December 2009

The data above were extracted from the Essential Science Indicators database of Thomson Reuters. The database, currently covering the period January 1999 through December 2009, surveys only journal articles (original research reports and review articles) indexed by Thomson Reuters. Articles are assigned to a category based on the journals in which they were published and the journal-to-category field definition scheme used by Thomson Reuters. Both articles tabulated and citation counts to those articles are for the period indicated.

Sweden ranks 16^th in output, 13^th in citations received, and 7^th in citations per paper (among nations publishing 50,000 or more papers during the period) across the science and social science fields surveyed in Essential Science Indicators. The table above ranks fields for Sweden by relative citation impact, that is, citations per paper for Sweden in a field compared with the world’s citations per paper score in the same field. Sweden’s percentage above or below the world average is presented in the column at far right. For more information on the Thomson Reuters Essential Science Indicators database, see: http://scientific.thomsonreuters.com/products/esi