United States of America (USA)

1 September 2020 - 31 August 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 September 2020 - 31 August 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
27501 19417.90

Outputs by subject (FC)

Subject Count Share
Life Sciences 12789 9447.65
Chemistry 6486 4685.45
Physical Sciences 7483 4807.78
Earth & Environmental Sciences 4294 2807.18
221 128.10
82 54.09
668 484.68
203 123.61
160 101.74
1013 697.48
416 296.35
310 215.36
69 34.31
59 36.93
337 177.51
79 44.46
275 185.71
70 34.15
139 77.50
6 4.49
187 110.73

1 September 2020 - 31 August 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 (3964.67)
    1844.93
    2119.74
  2. 1124.53
    824.36
  3. Germany (1843.66)
    1028.75
    814.91
  4. Canada (1157.88)
    725.99
    431.89
  5. France (1044.73)
    640.28
    404.45
  6. Japan (966.10)
    596.65
    369.45
  7. Australia (699.15)
    414.57
    284.58
  8. Switzerland (687.44)
    413.63
    273.81
  9. South Korea (650.14)
    386.65
    263.49
  10. Italy (584.37)
    354.14
    230.23

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 2522 859.15
2. Stanford University 1538 587.38
3. Massachusetts Institute of Technology (MIT) 1744 504.61
4. National Institutes of Health (NIH) 1035 407.87
5. University of California, Berkeley (UC Berkeley) 1184 366.67
6. University of Michigan (U-M) 959 354.81
7. University of California, Los Angeles (UCLA) 1049 349.29
8. University of California, San Diego (UC San Diego) 950 325.10
9. Yale University 930 314.78
10. University of Pennsylvania (Penn) 847 304.03

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