United States of America (USA)

Research

Date range: 1 June 2022 - 31 May 2023

Subject/journal group: All

The table to the right includes counts of all research outputs for United States of America (USA) published between 1 June 2022 - 31 May 2023 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
28760 20158.06

Outputs by subject (Share)

Outputs by subject
Subject Count Share
10025 7382.61
6031 4345.85
3680 2304.36
6879 4949.89
7168 4532.71

Share output for the past 5 years

Share per year
2018 2019 2020 2021 2022*
20419.41 20178.77 20627.93 19851.53 21473.34

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

*Note: 2022 data contains Share for article affiliations from newly added health sciences journals.

Collaboration

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

Collaborations between countries

Date range: 1 June 2022 - 31 May 2023

Collaboration by percentage of Share

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

Collaboration by percentage of Share
Country Share (%)
China 27.31
UK 13.8
Germany 13.31
Canada 10.41
France 7.86
Japan 6.67
Australia 5.32
Switzerland 5.21
Italy 5.08
Spain 5.04

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

  1. United States of America (USA) and China (3935.67)
    United States of America (USA)1629.71
    China2305.96
  2. United States of America (USA) and United Kingdom (UK) (1988.94)
    United States of America (USA)1205.99
    United Kingdom (UK)782.95
  3. United States of America (USA) and Germany (1918.96)
    United States of America (USA)1116.58
    Germany802.38
  4. United States of America (USA) and Canada (1499.97)
    United States of America (USA)979.14
    Canada520.83
  5. United States of America (USA) and France (1132.54)
    United States of America (USA)708.24
    France424.29
  6. United States of America (USA) and Japan (961.39)
    United States of America (USA)607.83
    Japan353.56
  7. United States of America (USA) and Australia (766.53)
    United States of America (USA)487.58
    Australia278.95
  8. United States of America (USA) and Switzerland (750.75)
    United States of America (USA)471.08
    Switzerland279.67
  9. United States of America (USA) and Italy (732.71)
    United States of America (USA)459.71
    Italy273.00
  10. United States of America (USA) and Spain (725.89)
    United States of America (USA)488.14
    Spain237.75

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 3516 1099.65
2. Stanford University 1827 512.14
3. Massachusetts Institute of Technology (MIT) 1918 485.67
4. National Institutes of Health (NIH) 1134 392.05
5. University of Michigan (U-M) 1221 367.16
6. Yale University 1258 354.41
7. University of Pennsylvania (Penn) 1096 340.86
8. University of California, San Diego (UC San Diego) 1020 319.40
9. University of California, Los Angeles (UCLA) 1230 317.68
10. University of California, Berkeley (UC Berkeley) 1283 316.70

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