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

Rank  Field Papers Citations Citations/ Paper World Cites/Paper % +/- 1 Physics 98,066 1,210,520 12.34 8.82 +40 2 Geosciences 25,475 324,708 12.75 9.39 +36 3 Space Science 18,392 340,917 18.54 14.10 +31 4 Plant/Animal Sciences 37,592 366,504 9.75 7.49 +30 5 Engineering 46,223 255,101 5.52 4.43 +25 6 Chemistry 97,452 1,279,355 13.13 10.61 +24 6 Materials Science 34,250 274,083 8.00 6.44 +24 8 Environment/Ecology 15,519 201,298 12.97 10.70 +21 9 Microbiology 15,269 284,294 18.62 15.60 +19 9 Mathematics 20,034 79,492 3.97 3.34 +19 11 Biochemistry 44,951 891,082 19.82 17.04 +16 12 Molecular Biology 27,181 791,830 29.13 25.63 +14 13 Pharmacology 12,554 165,626 13.19 11.80 +12 14 Neurosciences 29,233 600,867 20.55 19.07 + 8 15 Immunology 10,580 246,416 23.29 21.50 + 8 16 Clinical Medicine 178,935 2,353,012 13.15 12.63 + 4 17 Computer Science 19,498 68,859 3.53 3.45 + 2 18 Agricultural Sciences 11,303 76,473 6.77 6.73 + 1 19 Psychiatry/Psychology 17,369 153,676 8.85 10.74 -18 20 Economics/Business 7,835 32,535 4.15 5.72 -27 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.

Germany ranks 3^rd in output, 3^rd in citations received, and 11^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 Germany by relative citation impact, that is, citations per paper for Germany in a field compared with the world’s citations per paper score in the same field. Germany’s percentage above or below the world average is presented in the column at far right. Only in the fields of Psychiatry/Psychology and Business/Economics did Germany fail to achieve the world average in citation impact. For more information on the Thomson Reuters Essential Science Indicators database, see: http://scientific.thomsonreuters.com/products/esi