Top 100 bilateral collaborators

Tables are calculated based on average collaboration score or bilateral collaboration score in 2015. The first measure is the average of the fractional count (FC) for collaborative papers of the named institution and all its partners. The bilateral collaboration score sums the FCs derived from collaborative papers of the two collaborating institutions*.

* Large research consortia, such as CNRS in France and the Chinese Academy of Sciences, have been split into their constituent parts.

2015 Rank Institution #1 Country #1 Institution #2 Country #2 Bilateral CS
1 Harvard University United States of America (USA) Massachusetts Institute of Technology (MIT) United States of America (USA) 340.05
2 Lawrence Berkeley National Laboratory (LBNL) United States of America (USA) University of California Berkeley (UC Berkeley) United States of America (USA) 254.82
3 Institute of Chemistry (ICCAS), CAS China Peking University (PKU) China  240.9
4 Harvard University United States of America (USA) Smithsonian Institution United States of America (USA) 207.21
5 Peking University (PKU) China Tsinghua University (TH) China  88.44
6 Boston University (BU) United States of America (USA) Harvard University United States of America (USA)   80.7
7 Paris Diderot University (Paris 7) France Pierre and Marie Curie University (UPMC) - Paris 6 France   77.8
8 KTH Royal Institute of Technology Sweden Stockholm University Sweden  74.99
9 Institute of Physics (IOP), CAS China Peking University (PKU) China  72.76
10 Atomic Energy and Alternative Energies Commission (CEA) France Paris Diderot University (Paris 7) France   71.2
11 Changchun Institute of Applied Chemistry (CIAC), CAS China University of Chinese Academy of Sciences (UCAS) China  70.08
12 University of California Los Angeles (UCLA) United States of America (USA) University of California Santa Barbara (UCSB) United States of America (USA)  69.81
13 Swiss Federal Institute of Technology Zurich (ETH Zurich) Switzerland Swiss Federal Institute of Technology in Lausanne (EPFL) Switzerland  69.68
14 National Institute for Astrophysics (INAF) Italy University of Bologna (UNIBO) Italy  67.69
15 RIKEN Center for Emergent Matter Science (CEMS) Japan The University of Tokyo (UTokyo) Japan   62.8
16 Imperial College London (ICL) United Kingdom (UK) University College London (UCL) United Kingdom (UK)  61.22
17 National Institute of Standards and Technology (NIST) United States of America (USA) University of Maryland, College Park (UMCP) United States of America (USA)  59.91
18 University of Cambridge United Kingdom (UK) University of Oxford United Kingdom (UK)  58.57
19 European Southern Observatory (ESO) Germany National Institute for Astrophysics (INAF) Italy  57.78
20 Institute of Physics (IOP), CAS China Tsinghua University (TH) China  57.73
21 Kyoto University Japan The University of Tokyo (UTokyo) Japan  57.46
22 Ludwig Maximilian University of Munich (LMU) Germany Technical University of Munich (TUM) Germany  55.97
23 Pierre and Marie Curie University (UPMC) - Paris 6 France École Normale Supérieure (ENS Paris) France  55.61
24 National Institute for Health and Medical Research (INSERM) France Pierre and Marie Curie University (UPMC) - Paris 6 France  55.24
25 Harvard University United States of America (USA) University of Massachusetts Medical School (UMass Medical School) United States of America (USA)  54.35
26 California Institute of Technology (Caltech) United States of America (USA) University of California Berkeley (UC Berkeley) United States of America (USA)  53.09
27 University of California Berkeley (UC Berkeley) United States of America (USA) University of California San Francisco (UCSF) United States of America (USA)  52.86
28 Oak Ridge National Laboratory (ORNL) United States of America (USA) The University of Tennessee at Knoxville (UTK) United States of America (USA)  51.68
29 Atomic Energy and Alternative Energies Commission (CEA) France Joseph Fourier University (UJF) France  51.41
30 Swiss Federal Institute of Technology Zurich (ETH Zurich) Switzerland University of Zurich (UZH) Switzerland     51
31 Harvard University United States of America (USA) Tufts University United States of America (USA)  49.78
32 Stanford University United States of America (USA) University of California Berkeley (UC Berkeley) United States of America (USA)  49.39
33 National Institute for Astrophysics (INAF) Italy University of Padova (UNIPD) Italy  49.29
34 NASA Goddard Space Flight Center (GSFC) United States of America (USA) University of Maryland, College Park (UMCP) United States of America (USA)   48.9
35 Harvard University United States of America (USA) University of Zurich (UZH) Switzerland  48.85
36 Hefei Institutes of Physical Science (HIPS), CAS China University of Science and Technology of China (USTC) China  48.08
37 The University of Tokyo (UTokyo) Japan Tohoku University Japan  47.46
38 Argonne National Laboratory (ANL) United States of America (USA) Northwestern University (NU) United States of America (USA)  47.36
39 Argonne National Laboratory (ANL) United States of America (USA) The University of Chicago (UChicago) United States of America (USA)  47.12
40 McGill University Canada University of Montreal (UdeM) Canada  46.97
41 National Institute of Standards and Technology (NIST) United States of America (USA) University of Colorado Boulder (CU-Boulder) United States of America (USA)  46.95
42 The University of Edinburgh United Kingdom (UK) University of St Andrews United Kingdom (UK)  45.85
43 Harvard University United States of America (USA) Yale University United States of America (USA)  45.45
44 Free University of Berlin (FU Berlin) Germany Humboldt University of Berlin (HU Berlin) Germany  44.47
45 Nankai University (NKU) China Tianjin University (TJU) China  44.26
46 Paris Diderot University (Paris 7) France Paris Observatory France  43.97
47 Salk Institute for Biological Studies (Salk) United States of America (USA) University of California, San Diego (UC San Diego) United States of America (USA)  43.53
48 Harvard University United States of America (USA) Humboldt University of Berlin (HU Berlin) Germany   43.4
49 Atomic Energy and Alternative Energies Commission (CEA) France Pierre and Marie Curie University (UPMC) - Paris 6 France  43.12
50 Free University of Berlin (FU Berlin) Germany Harvard University United States of America (USA)  42.75
51 National Scientific and Technical Research Council (CONICET) Argentina University of Buenos Aires (UBA) Argentina  42.65
52 California Institute of Technology (Caltech) United States of America (USA) Harvard University United States of America (USA)  41.73
53 Institute for Basic Science (IBS) South Korea Korea Advanced Institute of Science and Technology (KAIST) South Korea  41.35
54 University College London (UCL) United Kingdom (UK) University of Oxford United Kingdom (UK)  41.22
55 National Scientific and Technical Research Council (CONICET) Argentina National University of La Plata (UNLP) Argentina  40.22
56 Lawrence Berkeley National Laboratory (LBNL) United States of America (USA) Stanford University United States of America (USA)  40.11
57 Nanyang Technological University (NTU) Singapore National University of Singapore (NUS) Singapore  40.07
58 Osaka University Japan The University of Tokyo (UTokyo) Japan  39.18
59 Imperial College London (ICL) United Kingdom (UK) King's College London (KCL) United Kingdom (UK)  39.11
60 National Institute for Astrophysics (INAF) Italy University of La Laguna (ULL) Spain  38.76
61 California Institute of Technology (Caltech) United States of America (USA) NASA Goddard Space Flight Center (GSFC) United States of America (USA)  37.83
62 King's College London (KCL) United Kingdom (UK) University College London (UCL) United Kingdom (UK)  37.57
63 Jülich Research Centre (FZJ) Germany RWTH Aachen University (RWTH Aachen) Germany   37.2
64 Institute of Materials Research and Engineering (IMRE), A*STAR Singapore National University of Singapore (NUS) Singapore  37.06
65 Atomic Energy and Alternative Energies Commission (CEA) France University of Paris Sud (UPSud) France  36.68
66 National Institute for Health and Medical Research (INSERM) France Paris Descartes University (Paris 5) France  36.52
67 Institute of Chemistry (ICCAS), CAS China University of Chinese Academy of Sciences (UCAS) China  36.23
68 University of Glasgow United Kingdom (UK) University of Strathclyde United Kingdom (UK)  36.03
69 University of Lyon France École Normale Supérieure (ENS Paris) France   35.8
70 Max Planck Institute for Extraterrestrial Physics (MPE) Germany National Institute for Astrophysics (INAF) Italy   35.7
71 Harvard University United States of America (USA) University of California Berkeley (UC Berkeley) United States of America (USA)  35.46
72 Harvard University United States of America (USA) Stanford University United States of America (USA)  35.42
73 Curtin University Australia The University of Western Australia (UWA) Australia  35.39
74 National Institute for Astrophysics (INAF) Italy University of Cambridge United Kingdom (UK)  35.11
75 Centre National d’Etudes Spatiales (CNES) France Institute of Research for Development (IRD) France  34.98
76 Nanjing University (NJU) China University of Science and Technology of China (USTC) China  34.77
77 National Astronomical Observatories (NAOC), CAS China University of Chinese Academy of Sciences (UCAS) China  34.48
78 The University of Tokyo (UTokyo) Japan Tokyo Institute of Technology (Tokyo Tech) Japan  34.46
79 Imperial College London (ICL) United Kingdom (UK) University of Oxford United Kingdom (UK)  34.32
80 Columbia University in the City of New York (CU) United States of America (USA) Harvard University United States of America (USA)  34.02
81 Stanford Health Care United States of America (USA) Stanford University United States of America (USA)  33.85
82 German Cancer Research Center in the Helmholtz Association (DKFZ) Germany Heidelberg University (Uni Heidelberg) Germany  33.65
83 Institute of Research for Development (IRD) France Pierre and Marie Curie University (UPMC) - Paris 6 France  33.57
84 Harvard University United States of America (USA) University of Michigan (U-M) United States of America (USA)  33.39
85 Massachusetts Institute of Technology (MIT) United States of America (USA) Stanford University United States of America (USA)  33.27
86 Stanford Children's Health United States of America (USA) Stanford University United States of America (USA)  33.21
87 Cornell University United States of America (USA) Memorial Sloan Kettering Cancer Center (MSKCC) United States of America (USA)  33.09
88 Imperial College London (ICL) United Kingdom (UK) University of Cambridge United Kingdom (UK)  33.06
89 University of California Berkeley (UC Berkeley) United States of America (USA) University of California Santa Cruz (UCSC) United States of America (USA)  32.73
90 Florida State University (FSU) United States of America (USA) University of Florida (UF) United States of America (USA)  32.43
91 Paris Observatory France Pierre and Marie Curie University (UPMC) - Paris 6 France  32.33
92 University College London (UCL) United Kingdom (UK) University of Cambridge United Kingdom (UK)  32.29
93 National Institute for Astrophysics (INAF) Italy Paris Diderot University (Paris 7) France  32.08
94 Paris Diderot University (Paris 7) France École Normale Supérieure (ENS Paris) France  32.02
95 National Astronomical Observatory of Japan (NAOJ), NINS Japan The University of Tokyo (UTokyo) Japan  31.95
96 California Institute of Technology (Caltech) United States of America (USA) University of California Los Angeles (UCLA) United States of America (USA)  31.67
97 Dalian Institute of Chemical Physics (DICP), CAS China University of Chinese Academy of Sciences (UCAS) China  31.48
98 Kyoto University Japan Nagoya University Japan  31.48
99 University of Cambridge United Kingdom (UK) Wellcome Trust Sanger Institute United Kingdom (UK)     31
100 Kyoto University Japan Osaka University Japan  30.74

Weighted fractional count (WFC) for each institution is shown to two decimal places only. When two or more institutions have the same WFC, their positions are determined by the thousandth place (or beyond).

These results are based on the most recent data available. Owing to continual refinements of the data, the figures in the database are liable to change and might differ to those printed in the supplements.