United States of America (USA)

1 December 2019 - 30 November 2020

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 2019 - 30 November 2020 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
29028	20575.39

Outputs by subject (FC)

Subject	Count	Share
Life Sciences	12936	9595.56
Earth & Environmental Sciences	4340	2853.50
Earth and Planetary Science Letters	259	150.86
Ecology Letters	70	44.50
Environmental Science and Technology	642	445.10
Geochimica et Cosmochimica Acta	253	154.68
Geology	118	80.43
Geophysical Research Letters	1020	741.03
Journal of Geophysical Research: Atmospheres	390	270.75
Journal of Geophysical Research: Solid Earth	289	198.57
Nature	69	32.66
Nature Climate Change	74	47.27
Nature Communications	303	155.56
Nature Geoscience	77	44.68
Proceedings of the National Academy of Sciences of the United States of America	279	182.57
Science	62	36.39
Science Advances	167	98.42
Water Research	268	170.04
Chemistry	7233	5248.90
Physical Sciences	8320	5380.09

1 December 2019 - 30 November 2020

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)

China (4422.46)

2108.76

2313.69
United Kingdom (UK) (1978.10)

1145.56

832.54
Germany (1926.28)

1087.53

838.74
Canada (1209.39)

755.58

453.81
France (1095.28)

663.82

431.46
Japan (978.01)

601.24

376.77
Australia (713.20)

428.17

285.03
Switzerland (700.36)

415.30

285.06
South Korea (699.06)

421.88

277.18
Italy (591.47)

357.90

233.57

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	2541	911.45
2.	Stanford University	1699	647.15
3.	Massachusetts Institute of Technology (MIT)	1837	529.68
4.	National Institutes of Health (NIH)	1085	402.77
5.	University of California, Berkeley (UC Berkeley)	1306	396.16
6.	University of Michigan (U-M)	1018	391.20
7.	Yale University	991	351.50
8.	University of California, San Diego (UC San Diego)	1007	342.47
9.	Columbia University in the City of New York (CU)	1029	327.57
10.	University of California, Los Angeles (UCLA)	1118	327.07