United States of America (USA)

1 April 2020 - 31 March 2021

Subject/journal group: All

The table to the right includes counts of all research outputs for United States of America (USA) published between 1 April 2020 - 31 March 2021 which are tracked by the Nature Index.

Hover over the donut graph to view the FC output for each subject. Below, the same research outputs are grouped by subject. Click on the subject to drill-down into a list of articles organized by journal, and then by title.

Note: Articles may be assigned to more than one subject area.

Count Share
29354 20755.92

Outputs by subject (FC)

Subject Count Share
Chemistry 7061 5108.54
Life Sciences 13224 9806.79
Physical Sciences 8522 5495.33
Earth & Environmental Sciences 4416 2905.51

1 April 2020 - 31 March 2021

View the connected world of international research collaboration. Visualize collaborations by subject or region.

Collaborations between countries

Percentage of collaboration by Share

Hover over the graph to view the percentage of collaboration.

Top 10 collaborators by Share

  • United States of America (USA)
  1. China (4360.59)
    2068.12
    2292.47
  2. 1173.47
    873.57
  3. Germany (1962.76)
    1094.07
    868.70
  4. Canada (1225.91)
    775.09
    450.83
  5. France (1109.44)
    680.93
    428.51
  6. Japan (1009.17)
    624.32
    384.85
  7. Australia (727.46)
    437.27
    290.19
  8. Switzerland (703.85)
    416.59
    287.26
  9. South Korea (689.02)
    399.96
    289.06
  10. Italy (607.03)
    371.21
    235.82

Collaboration is determined by the combined fractional count (Share) of United States of America (USA) and the collaborating country.

Top 10 institutions from United States of America (USA)

Institution Count Share
1. Harvard University 2670 948.12
2. Stanford University 1664 614.45
3. Massachusetts Institute of Technology (MIT) 1854 547.71
4. National Institutes of Health (NIH) 1092 411.68
5. University of California, Berkeley (UC Berkeley) 1280 389.68
6. University of Michigan (U-M) 1009 364.05
7. Yale University 1011 357.97
8. University of California, Los Angeles (UCLA) 1093 346.67
9. University of California, San Diego (UC San Diego) 1001 336.24
10. Columbia University in the City of New York (CU) 1039 330.30

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