Countries vary in their level of scientific effort as measured by publication and citation activity. The distribution of effort is uneven, and dominated by the developed countries. The level of activity is roughly correlated with national GNP or other measures of economic output. Comparing countries on a citations per paper basis can help correct for size (output) differences.

Country Rankings lists either:

• the ranked country in an individual field (or all fields)
  or
• the ranked fields for an individual country

Use a drop-down list to open a list of sort options (Citations, Papers, Citations per Paper, Institution or Field). The default sort is by Citations. Click the Papers or Graphs Icons to access pages for the selected institution or field.

List of Fields ISI Essential Science Indicators Web product  categorizes papers into fields of research. They are: Agricultural Sciences Biology & Biochemistry Chemistry Clinical Medicine Computer Science Ecology/Environment Economics & Business Engineering Geosciences Immunology Material Sciences Mathematics Microbiology Molecular Biology & Genetics Multidisciplinary Neuroscience & Behavior Pharmacology & Toxicology Physics Plant & Animal Science Psychology/Psychiatry Social Sciences, general Space Science