United States of America (USA)

Research

Date range: 1 December 2020 - 30 November 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 December 2020 - 30 November 2021 which are tracked by the Nature Index.

Hover over the donut graph to view the Share 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.

Article Count and Share for United States of America (USA)
Count Share
27778 19610.63

Outputs by subject (Share)

Outputs by subject
Subject Count Share
12890 9520.79
6984 5059.23
4633 3075.55
7998 5214.18

Share output for the past 5 years

Share per year
2016 2017 2018 2019 2020
20010.55 20000.00 20423.13 20184.42 20635.40

Compare United States of America (USA) with other countries/territories

Collaboration

Date range: 1 December 2020 - 30 November 2021

Collaboration by percentage of Share

Hover over the graph to view collaboration by percentage of Share.

Collaboration by percentage of Share
Country Share (%)
China 29.29
UK 13.98
Germany 13.72
Canada 8.77
France 7.74
Japan 7.11
Switzerland 5.16
Australia 5.01
South Korea 4.87
Italy 4.36

Top 10 collaborators with United States of America (USA) by Share

  1. United States of America (USA) and China (4003.07)
    United States of America (USA)1853.36
    China2149.71
  2. United States of America (USA) and United Kingdom (UK) (1910.45)
    United States of America (USA)1096.85
    United Kingdom (UK)813.60
  3. United States of America (USA) and Germany (1874.94)
    United States of America (USA)1051.55
    Germany823.39
  4. United States of America (USA) and Canada (1198.35)
    United States of America (USA)744.06
    Canada454.29
  5. United States of America (USA) and France (1058.40)
    United States of America (USA)642.84
    France415.55
  6. United States of America (USA) and Japan (971.23)
    United States of America (USA)596.16
    Japan375.07
  7. United States of America (USA) and Switzerland (705.75)
    United States of America (USA)416.07
    Switzerland289.68
  8. United States of America (USA) and Australia (685.18)
    United States of America (USA)406.40
    Australia278.78
  9. United States of America (USA) and South Korea (665.51)
    United States of America (USA)394.65
    South Korea270.87
  10. United States of America (USA) and Italy (595.90)
    United States of America (USA)367.25
    Italy228.65

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) by Share

Institution Count Share
1. Harvard University 2589 903.81
2. Stanford University 1530 607.69
3. Massachusetts Institute of Technology (MIT) 1795 519.34
4. National Institutes of Health (NIH) 985 400.09
5. University of California, Berkeley (UC Berkeley) 1166 359.11
6. University of Michigan (U-M) 910 340.09
7. University of California, San Diego (UC San Diego) 983 337.46
8. University of California, Los Angeles (UCLA) 1016 334.90
9. Yale University 940 332.41
10. University of Pennsylvania (Penn) 829 313.76