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University · Leiden · Netherlands

Leiden University

In research, Leiden University stands highest in Health Sciences (#73 of 9,902 worldwide), Medicine (#67 of 8,541 worldwide) and Social Sciences (#96 of 9,585 worldwide), 2022-now. Relative to its size it is most specialised in Instrumentation, Transplantation and Anthropology (Instrumentation is 7.4× its share of world research).

leiden.eduROR OpenAlex
World rank, 2022-now
#125
of 22,385 · #197 all time
Rank in Netherlands
#6
of 197
Research works
88k
▼ 5% vs 2018-21
Citations
3.2M
36.7 per fractional work
Top-10% rate
15.2%
all institutions 10.0%
vs its own fields
1.41×
1.00× is exactly expected
Open access
45%
world 40%
International
26%
world 18%
Leiden University

What is Leiden University known for in research?

The fields where it stands highest, 2022-now, ranked among every institution above the floor in each field.

FieldWorld rankWhere that sitsTop-10% rateWorksAll time
Health SciencesDomain #73 of 9,902 16.0%3,726 #83
MedicineField #67 of 8,541 16.1%3,394 #71
Social SciencesDomain #96 of 9,585 17.2%3,668 #164
Social SciencesField #60 of 5,988 18.0%1,925 #122
Political Science and International RelationsSubfield #12 of 1,187 20.1%526 #71
Life SciencesDomain #171 of 6,403 12.8%1,677 #202
LawSubfield #13 of 445 20.7%112 #66
Physical SciencesDomain #319 of 10,670 14.4%2,348 #442
Sociology and Political ScienceSubfield #76 of 2,526 16.0%597 #174
Biochemistry, Genetics and Molecular BiologyField #130 of 2,964 12.5%890 #168

Each strip is that field's whole ranked pool, with the notch where Leiden University sits in it, in the colour of the band that rank falls in. The track under the rate is the rate itself: it carries no average mark, because the average differs by field (from about 6% in Dentistry to 21% in Economics).

Which of those standings moved

The same fields on both windows: where it stood over the whole record, and where it stands in 2022-now. The distance is the story, and it is the one thing the two rank columns above cannot show.

  1. Health Sciences#83 #73
  2. Medicine#71 #67
  3. Social Sciences#164 #96
  4. Social Sciences#122 #60
  5. Political Science and International Relations#71 #12
  6. Life Sciences#202 #171
  7. Law#66 #13
  8. Physical Sciences#442 #319
  9. Sociology and Political Science#174 #76
  10. Biochemistry, Genetics and Molecular Biology#168 #130
all time2022-now, better2022-now, worse

A dot further right is a better standing. Fields it was not ranked in over the whole record are left out.

Which fields of science does Leiden University work in?

In 2022-now, 32% of research at Leiden University is in Health Sciences, 32% in Social Sciences. Its largest fields are Medicine (30%), Social Sciences (17%), Biochemistry, Genetics and Molecular Biology (8%). It does 1.4× the world's share of Health Sciences.

Health Sciences: 4,186 fractional works · 32.4% of its workMedicine: 3,814 fractional works · 29.5% of its workSurgery: 443 fractional works · 3.4% of its workCardiology and Cardiovascular Medicine: 336 fractional works · 2.6% of its workPulmonary and Respiratory Medicine: 306 fractional works · 2.4% of its workEpidemiology: 276 fractional works · 2.1% of its workOncology: 249 fractional works · 1.9% of its workPublic Health, Environmental and Occupational Health: 223 fractional works · 1.7% of its workRadiology, Nuclear Medicine and Imaging: 207 fractional works · 1.6% of its workRheumatology: 200 fractional works · 1.5% of its workPhysiology: 155 fractional works · 1.2% of its workPsychiatry and Mental health: 126 fractional works · 1.0% of its workPediatrics, Perinatology and Child Health: 121 fractional works · 0.9% of its workNeurology: 121 fractional works · 0.9% of its workInfectious Diseases: 100 fractional works · 0.8% of its workPathology and Forensic Medicine: 97 fractional works · 0.8% of its workEndocrinology, Diabetes and Metabolism: 96 fractional works · 0.7% of its workHematology: 84 fractional works · 0.7% of its workPharmacology: 64 fractional works · 0.5% of its workObstetrics and Gynecology: 58 fractional works · 0.4% of its workGenetics: 54 fractional works · 0.4% of its workNephrology: 48 fractional works · 0.4% of its workOphthalmology: 43 fractional works · 0.3% of its workInternal Medicine: 37 fractional works · 0.3% of its workDermatology: 32 fractional works · 0.3% of its workHepatology: 32 fractional works · 0.2% of its workEmergency Medicine: 30 fractional works · 0.2% of its workReproductive Medicine: 29 fractional works · 0.2% of its workTransplantation: 28 fractional works · 0.2% of its workCritical Care and Intensive Care Medicine: 27 fractional works · 0.2% of its workGeriatrics and Gerontology: 26 fractional works · 0.2% of its workSmaller subfields together: 164 fractional works · 1.3% of its workHealth Professions: 319 fractional works · 2.5% of its workGeneral Health Professions: 217 fractional works · 1.7% of its workSmaller subfields together: 102 fractional works · 0.8% of its workNursing: 30 fractional works · 0.2% of its workDentistry: 13 fractional works · 0.1% of its workVeterinary: 10 fractional works · 0.1% of its workSocial Sciences: 4,118 fractional works · 31.9% of its workSocial Sciences: 2,153 fractional works · 16.7% of its workSociology and Political Science: 674 fractional works · 5.2% of its workPolitical Science and International Relations: 584 fractional works · 4.5% of its workAnthropology: 172 fractional works · 1.3% of its workEducation: 143 fractional works · 1.1% of its workLaw: 121 fractional works · 0.9% of its workGender Studies: 58 fractional works · 0.5% of its workSafety Research: 55 fractional works · 0.4% of its workCultural Studies: 49 fractional works · 0.4% of its workLinguistics and Language: 47 fractional works · 0.4% of its workDemography: 42 fractional works · 0.3% of its workCommunication: 36 fractional works · 0.3% of its workHealth: 34 fractional works · 0.3% of its workPublic Administration: 32 fractional works · 0.2% of its workSmaller subfields together: 106 fractional works · 0.8% of its workArts and Humanities: 702 fractional works · 5.4% of its workLanguage and Linguistics: 151 fractional works · 1.2% of its workHistory: 128 fractional works · 1.0% of its workArcheology: 106 fractional works · 0.8% of its workPhilosophy: 74 fractional works · 0.6% of its workLiterature and Literary Theory: 67 fractional works · 0.5% of its workHistory and Philosophy of Science: 51 fractional works · 0.4% of its workReligious studies: 30 fractional works · 0.2% of its workClassics: 29 fractional works · 0.2% of its workSmaller subfields together: 65 fractional works · 0.5% of its workPsychology: 616 fractional works · 4.8% of its workClinical Psychology: 217 fractional works · 1.7% of its workExperimental and Cognitive Psychology: 151 fractional works · 1.2% of its workSocial Psychology: 141 fractional works · 1.1% of its workDevelopmental and Educational Psychology: 61 fractional works · 0.5% of its workApplied Psychology: 40 fractional works · 0.3% of its workSmaller subfields together: 7 fractional works · 0.1% of its workBusiness, Management and Accounting: 240 fractional works · 1.9% of its workStrategy and Management: 107 fractional works · 0.8% of its workOrganizational Behavior and Human Resource Management: 43 fractional works · 0.3% of its workAccounting: 31 fractional works · 0.2% of its workSmaller subfields together: 59 fractional works · 0.5% of its workEconomics, Econometrics and Finance: 237 fractional works · 1.8% of its workEconomics and Econometrics: 169 fractional works · 1.3% of its workFinance: 45 fractional works · 0.4% of its workSmaller subfields together: 23 fractional works · 0.2% of its workDecision Sciences: 169 fractional works · 1.3% of its workManagement Science and Operations Research: 55 fractional works · 0.4% of its workInformation Systems and Management: 55 fractional works · 0.4% of its workStatistics, Probability and Uncertainty: 52 fractional works · 0.4% of its workSmaller subfields together: 7 fractional works · 0.1% of its workPhysical Sciences: 2,698 fractional works · 20.9% of its workComputer Science: 687 fractional works · 5.3% of its workArtificial Intelligence: 325 fractional works · 2.5% of its workInformation Systems: 106 fractional works · 0.8% of its workComputer Vision and Pattern Recognition: 77 fractional works · 0.6% of its workComputational Theory and Mathematics: 69 fractional works · 0.5% of its workComputer Networks and Communications: 32 fractional works · 0.3% of its workSmaller subfields together: 78 fractional works · 0.6% of its workPhysics and Astronomy: 590 fractional works · 4.6% of its workAstronomy and Astrophysics: 312 fractional works · 2.4% of its workAtomic and Molecular Physics, and Optics: 104 fractional works · 0.8% of its workInstrumentation: 48 fractional works · 0.4% of its workStatistical and Nonlinear Physics: 44 fractional works · 0.3% of its workNuclear and High Energy Physics: 42 fractional works · 0.3% of its workSmaller subfields together: 40 fractional works · 0.3% of its workEngineering: 396 fractional works · 3.1% of its workBiomedical Engineering: 150 fractional works · 1.2% of its workElectrical and Electronic Engineering: 75 fractional works · 0.6% of its workMechanical Engineering: 30 fractional works · 0.2% of its workSmaller subfields together: 141 fractional works · 1.1% of its workEnvironmental Science: 381 fractional works · 2.9% of its workEcology: 86 fractional works · 0.7% of its workGlobal and Planetary Change: 66 fractional works · 0.5% of its workEnvironmental Engineering: 41 fractional works · 0.3% of its workHealth, Toxicology and Mutagenesis: 39 fractional works · 0.3% of its workManagement, Monitoring, Policy and Law: 38 fractional works · 0.3% of its workPollution: 31 fractional works · 0.2% of its workNature and Landscape Conservation: 26 fractional works · 0.2% of its workSmaller subfields together: 54 fractional works · 0.4% of its workMathematics: 179 fractional works · 1.4% of its workStatistics and Probability: 76 fractional works · 0.6% of its workMathematical Physics: 39 fractional works · 0.3% of its workSmaller subfields together: 65 fractional works · 0.5% of its workChemistry: 156 fractional works · 1.2% of its workOrganic Chemistry: 58 fractional works · 0.5% of its workSpectroscopy: 53 fractional works · 0.4% of its workSmaller subfields together: 45 fractional works · 0.3% of its workMaterials Science: 122 fractional works · 0.9% of its workMaterials Chemistry: 74 fractional works · 0.6% of its workSmaller subfields together: 48 fractional works · 0.4% of its workEarth and Planetary Sciences: 98 fractional works · 0.8% of its workAtmospheric Science: 29 fractional works · 0.2% of its workPaleontology: 26 fractional works · 0.2% of its workSmaller subfields together: 42 fractional works · 0.3% of its workEnergy: 68 fractional works · 0.5% of its workRenewable Energy, Sustainability and the Environment: 62 fractional works · 0.5% of its workSmaller subfields together: 7 fractional works · 0.1% of its workChemical Engineering: 20 fractional works · 0.2% of its workLife Sciences: 1,910 fractional works · 14.8% of its workBiochemistry, Genetics and Molecular Biology: 1,022 fractional works · 7.9% of its workMolecular Biology: 610 fractional works · 4.7% of its workGenetics: 174 fractional works · 1.3% of its workCancer Research: 74 fractional works · 0.6% of its workCell Biology: 47 fractional works · 0.4% of its workSmaller subfields together: 117 fractional works · 0.9% of its workNeuroscience: 364 fractional works · 2.8% of its workCognitive Neuroscience: 177 fractional works · 1.4% of its workCellular and Molecular Neuroscience: 72 fractional works · 0.6% of its workEndocrine and Autonomic Systems: 34 fractional works · 0.3% of its workNeurology: 32 fractional works · 0.2% of its workSmaller subfields together: 49 fractional works · 0.4% of its workImmunology and Microbiology: 285 fractional works · 2.2% of its workImmunology: 237 fractional works · 1.8% of its workSmaller subfields together: 48 fractional works · 0.4% of its workAgricultural and Biological Sciences: 201 fractional works · 1.6% of its workPlant Science: 83 fractional works · 0.6% of its workEcology, Evolution, Behavior and Systematics: 37 fractional works · 0.3% of its workFood Science: 29 fractional works · 0.2% of its workSmaller subfields together: 52 fractional works · 0.4% of its workPharmacology, Toxicology and Pharmaceutics: 38 fractional works · 0.3% of its workALL ITS WORKLeiden University13kfractional works, 2022-now
Life Sciences15%Physical Sciences21%Health Sciences32%Social Sciences32%

Each ring splits the one inside it: the four domains of science, their fields, their subfields. Size is fractional works in 2022-now. Every slice is a page; the interactive view zooms down to single topics and colours each by how much more of it this institution does than the world.

Its 4 domains and 26 fields, with their numbers
  1. Health Sciences4,18632.4%
    1. Medicine3,81429.5%
    2. Health Professions3192.5%
    3. Nursing300.2%
    4. Dentistry130.1%
    5. Veterinary100.1%
  2. Social Sciences4,11831.9%
    1. Social Sciences2,15316.7%
    2. Arts and Humanities7025.4%
    3. Psychology6164.8%
    4. Business, Management and Accounting2401.9%
    5. Economics, Econometrics and Finance2371.8%
    6. Decision Sciences1691.3%
    1. Computer Science6875.3%
    2. Physics and Astronomy5904.6%
    3. Engineering3963.1%
    4. Environmental Science3812.9%
    5. Mathematics1791.4%
    6. Chemistry1561.2%
    7. Materials Science1220.9%
    8. Earth and Planetary Sciences980.8%
    9. Energy680.5%
    10. Chemical Engineering200.2%
  4. Life Sciences1,91014.8%
    1. Biochemistry, Genetics and Molecular Biology1,0227.9%
    2. Neuroscience3642.8%
    3. Immunology and Microbiology2852.2%
    4. Agricultural and Biological Sciences2011.6%
    5. Pharmacology, Toxicology and Pharmaceutics380.3%
All of science, and how each field's share has moved since 1950: the Science domain explorer

What does Leiden University specialise in?

Where its research is concentrated relative to its size: Instrumentation takes 7.4× the share of its output that it takes of world research.

  1. InstrumentationSubfield · 47.8 works7.4×
  2. TransplantationSubfield · 28.0 works4.9×
  3. AnthropologySubfield · 172.2 works4.7×
  4. Internal MedicineSubfield · 37.4 works4.7×
  5. Astronomy and AstrophysicsSubfield · 312.1 works4.7×
  6. Public AdministrationSubfield · 32.0 works4.6×
← less than its size predicts1×more →

Location quotient, a volume reading rather than an impact one. It surfaces small, lopsided specialities.

Field profile

Location quotient across every field it publishes in: outside the ring is more than an institution of this size would be expected to publish, inside it is less.

Agricultural and Biological Sciences: 0.33× its world share, 201 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 1.48× its world share, 1,022 worksBiochemistry, Geneti…Immunology and Microbiology: 2.19× its world share, 285 worksImmunology and Micro…Neuroscience: 1.74× its world share, 364 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 0.84× its world share, 38 worksPharmacology, Toxico…Chemical Engineering: 0.45× its world share, 20 worksChemical EngineeringChemistry: 0.77× its world share, 156 worksChemistryComputer Science: 0.68× its world share, 687 worksComputer ScienceEarth and Planetary Sciences: 0.48× its world share, 98 worksEarth and Planetary …Energy: 0.57× its world share, 68 worksEnergyEngineering: 0.20× its world share, 396 worksEngineeringEnvironmental Science: 0.59× its world share, 381 worksEnvironmental ScienceMaterials Science: 0.27× its world share, 122 worksMaterials ScienceMathematics: 1.18× its world share, 179 worksMathematicsPhysics and Astronomy: 2.05× its world share, 590 worksPhysics and AstronomyDentistry: 0.20× its world share, 13 worksDentistryHealth Professions: 0.94× its world share, 319 worksHealth ProfessionsMedicine: 1.54× its world share, 3,814 worksMedicineNursing: 0.48× its world share, 30 worksNursingVeterinary: 0.55× its world share, 10 worksVeterinaryArts and Humanities: 1.88× its world share, 702 worksArts and HumanitiesBusiness, Management and Accounting: 0.58× its world share, 240 worksBusiness, Management…Decision Sciences: 1.36× its world share, 169 worksDecision SciencesEconomics, Econometrics and Finance: 0.86× its world share, 237 worksEconomics, Econometr…Psychology: 1.57× its world share, 616 worksPsychologySocial Sciences: 1.32× its world share, 2,153 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Immunology and Microbiology, 2.2×. Every wedge is a field page.

All 26 fields, with their numbers
  1. Immunology and Microbiology2.19×285 works
  2. Physics and Astronomy2.05×590 works
  3. Arts and Humanities1.88×702 works
  4. Neuroscience1.74×364 works
  5. Psychology1.57×616 works
  6. Medicine1.54×3,814 works
  7. Biochemistry, Genetics and Molecular Biology1.48×1,022 works
  8. Decision Sciences1.36×169 works
  9. Social Sciences1.32×2,153 works
  10. Mathematics1.18×179 works
  11. Health Professions0.94×319 works
  12. Economics, Econometrics and Finance0.86×237 works
  13. Pharmacology, Toxicology and Pharmaceutics0.84×38 works
  14. Chemistry0.77×156 works
  15. Computer Science0.68×687 works
  16. Environmental Science0.59×381 works
  17. Business, Management and Accounting0.58×240 works
  18. Energy0.57×68 works
  19. Veterinary0.55×10 works
  20. Earth and Planetary Sciences0.48×98 works
  21. Nursing0.48×30 works
  22. Chemical Engineering0.45×20 works
  23. Agricultural and Biological Sciences0.33×201 works
  24. Materials Science0.27×122 works
  25. Engineering0.20×396 works
  26. Dentistry0.20×13 works

Who are the top researchers at Leiden University?

Ranked on the quality score, Eiko I. Fried, Michael V. Maseda and Ivo Labbé lead among researchers whose main affiliation is Leiden University.

  1. 1 Eiko I. Fried Netherlands · #2,371 worldwide 33k citations · 366 works
  2. 2 Michael V. Maseda Netherlands · #2,713 worldwide 15k citations · 379 works
  3. 3 Ivo Labbé Netherlands · #4,846 worldwide 27k citations · 398 works
  4. 4 Marc T. M. Koper Netherlands · #5,538 worldwide 79k citations · 649 works
  5. 5 Jorryt Matthee Netherlands · #5,550 worldwide 9k citations · 279 works
  6. 6 Marijn Franx Netherlands · #9,285 worldwide 44k citations · 568 works
  7. 7 Arnold Tukker Netherlands · #11,017 worldwide 27k citations · 358 works
  8. 8 Joop Schaye Netherlands · #11,232 worldwide 51k citations · 801 works
  9. 9 Eveline A. Crone Netherlands · #12,674 worldwide 33k citations · 416 works
  10. 10 Mauro Stefanon Netherlands · #17,284 worldwide 11k citations · 261 works
All ranked researchers at Leiden University

What are the most cited papers from Leiden University?

The most cited paper from Leiden University is "The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: Guidelines for Reporting Observational Studies" (Erik B von Elm, Douglas G. Altman, Matthias Egger et al., 2007), with 22,347 citations. Next come "Software survey: VOSviewer, a computer program for bibliometric mapping" (21,265) and "A global reference for human genetic variation" (20,444).

Most cited papers
#PaperReleasedCitations
1 The Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) Statement: Guidelines for Reporting Observational Studies Erik B von Elm, Douglas G. Altman, Matthias Egger et al. · PLoS Medicine Open access 10 Oct 2007 22,347
2 Software survey: VOSviewer, a computer program for bibliometric mapping Nees Jan van Eck, Ludo Waltman · Scientometrics Open access 30 Dec 2009 21,265
3 A global reference for human genetic variation Corresponding authors et al. · Nature Open access815 authors 29 Sep 2015 20,444
4 Planck 2018 results N. Aghanim et al. · Astronomy and Astrophysics Open access181 authors 3 Apr 2020 14,737
5 Overview of the CCP 4 suite and current developments Martyn Winn, Charles C. Ballard, Kevin D. Cowtan et al. · Acta Crystallographica Section D Biological Crystallography Open access 17 Mar 2011 12,694
All 55 most cited papers, with filters and sorting

Which keywords describe research at Leiden University?

By fractional works in 2022-now, weighted toward what it does more of than the world: Epidemiology, Inflammation, Globalization, Human Rights, Star Formation, Nationalism, Autoantibodies and Treatment.

▲ more of its work than of the world's◆ about the world's share▼ less than the world's

Size is fractional works in 2022-now in the topics tagged with each word; colour is the word's share of this institution's work against its share of the world's. The 40 words are chosen for being large and distinctive. Each links to the topic it comes from most.

All 40 words, with their numbers
  1. Epidemiology592◆ 1.15×135 topics
  2. Inflammation434▲ 1.58×83 topics
  3. Globalization411▲ 1.62×127 topics
  4. Human Rights294▲ 2.2×76 topics
  5. Machine Learning284▼ 0.66×82 topics
  6. Treatment238▲ 1.52×50 topics
  7. Mental Health221▲ 1.20×42 topics
  8. Quality of Life207◆ 1.11×54 topics
  9. Cancer206▲ 1.18×53 topics
  10. Risk Factors186▲ 1.31×37 topics
  11. Depression175▲ 1.54×24 topics
  12. Nationalism170▲ 2.9×32 topics
  13. Immunotherapy169▲ 1.81×19 topics
  14. Diagnosis168▲ 1.40×41 topics
  15. History163▲ 1.82×48 topics
  16. Clinical Practice Guidelines162▲ 2.3×14 topics
  17. Colonialism156▲ 2.5×41 topics
  18. International Law145▲ 3.6×26 topics
  19. Democracy137▲ 3.0×25 topics
  20. Religion137▲ 2.3×33 topics
  21. Autoantibodies132▲ 4.4×8 topics
  22. Global Governance132▲ 4.3×22 topics
  23. Neurological Disorders129▲ 1.75×20 topics
  24. Cardiovascular Risk128▲ 3.1×9 topics
  25. Echocardiography119▲ 3.3×8 topics
  26. Prognostic Factors119▲ 2.1×14 topics
  27. Heart Failure117▲ 2.0×14 topics
  28. Star Formation108▲ 15×2 topics
  29. Emotion Regulation108▲ 2.6×9 topics
  30. Cytokines106▲ 2.8×8 topics
  31. Magnetic Resonance Imaging98▲ 3.0×8 topics
  32. International Relations95▲ 3.0×24 topics
  33. Public Opinion94▲ 6.1×6 topics
  34. European Union92▲ 3.2×26 topics
  35. Accretion Disks78▲ 12×2 topics
  36. Magnetic Fields78▲ 9.2×2 topics
  37. Black Holes76▲ 6.1×3 topics
  38. Biological Therapy65▲ 8.6×2 topics
  39. Disease-Modifying Antirheumatic Drugs60▲ 9.0×1 topic
  40. Joint Inflammation60▲ 9.0×1 topic

Which research topics does Leiden University publish most on?

By volume in 2022-now: Rheumatoid Arthritis Research and Therapies, Stellar, planetary, and galactic studies, Astrophysics and Star Formation Studies and Cardiac Valve Diseases and Treatments.

Rheumatoid Arthritis Res…60Rheumatoid Arthritis Research and Therapies: 60 fractional worksStellar, planetary, and …59Stellar, planetary, and galactic studies: 59 fractional worksAstrophysics and Star Formation Studies: 59 fractional worksCardiac Valve Diseases a…52Cardiac Valve Diseases and Treatments: 52 fractional worksGalaxies: Formation, Evo…50Galaxies: Formation, Evolution, Phenomena: 50 fractional worksAstronomy and Astrophysical Research: 47 fractional worksCardiovascular Function and Risk Factors: 41 fractional worksCardiac Imaging and Diag…40Cardiac Imaging and Diagnostics: 40 fractional worksImmunotherapy and Immune Responses: 38 fractional worksVenous Thromboembolism Diagnosis and Management: 37 fractional works
RheumatologyAstronomy and AstrophysicsCardiology and Cardiovascular MedicineInstrumentation3 others

Area is fractional works; colour is the subfield each topic belongs to.

  1. 1 Rheumatoid Arthritis Research and Therapies Rheumatology 60 works
  2. 2 Stellar, planetary, and galactic studies Astronomy and Astrophysics 59 works
  3. 3 Astrophysics and Star Formation Studies Astronomy and Astrophysics 59 works
  4. 4 Cardiac Valve Diseases and Treatments Cardiology and Cardiovascular Medicine 52 works
  5. 5 Galaxies: Formation, Evolution, Phenomena Astronomy and Astrophysics 50 works
  6. 6 Astronomy and Astrophysical Research Instrumentation 47 works
  7. 7 Cardiovascular Function and Risk Factors Cardiology and Cardiovascular Medicine 41 works
  8. 8 Cardiac Imaging and Diagnostics Radiology, Nuclear Medicine and Imaging 40 works
  9. 9 Immunotherapy and Immune Responses Immunology 38 works
  10. 10 Venous Thromboembolism Diagnosis and Management Internal Medicine 37 works

How open and international is its research?

Against the world's own shares: the tick on each track. Both are shares of its output, so they sit on one scale and can be read against each other as well as against the world.

openly available44.9%not open55.1%

World: 40% of research is openly available.

with international co-authors25.8%domestic only74.2%

World: 18% is written across borders.

How has Leiden University's research output changed?

Output in 2022-2025 was 5% lower than in 2018-2021.

still counting1990200020102020
grewheldshrank

The same series as a ribbon: one cell per year, darker for more. The line above answers how much; this answers when.

Its share of all research

Growing output can still be a shrinking share: all of science grows. This is Leiden University as a percentage of every work published that year, 0.051% in 2024.

still counting0.10%0.20%Leiden University0.047% in 202519801990200020102020

Fractional works of Leiden University over all fractional works that year. How the balance of science has shifted.

How much of it reaches the world top 10%

Year by year, against all institutions in the same year.

still counting10%20%Leiden University14.4% in 2025all institutions10.0% in 2025200020102020

Of each year's output, the share that reached the world's 10% most cited for its field and year. Peak 19.3% in 2010.

Other research institutions in Leiden

All research institutions in Leiden

Which institutions have research most like Leiden University's?

Among the world's leading institutions, University of Chicago has the research profile closest to Leiden University's, with both strong in Physics and Astronomy.

  1. 1 University of ChicagoUnited States · Both strong in Physics and Astronomy, Arts and Humanities, Neuroscience 0.91 Compare
  2. 2 Yale UniversityUnited States · Both strong in Immunology and Microbiology, Neuroscience, Psychology 0.88 Compare
  3. 3 University of OxfordUnited Kingdom · Both strong in Arts and Humanities, Physics and Astronomy, Neuroscience 0.85 Compare
  4. 4 University of VirginiaUnited States · Both strong in Neuroscience, Immunology and Microbiology, Medicine 0.83 Compare
  5. 5 University of California SystemUnited States · Both strong in Physics and Astronomy, Neuroscience, Arts and Humanities 0.82 Compare

Similarity is the correlation of each side's location quotients across every field it publishes in, on a log scale: 1 is the same shape of research, 0 is unrelated. It ignores size. How it is measured.

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Leiden University on Science Explorer

A card with Leiden University's standing and the fields it leads in, for a post or a slide. A link to this page previews as the same card.

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Its overall standing, then the domains, fields and subfields where Leiden University is in the world's top ten or its top 1%. Each has an image of its own.

Overall

Domains

Fields

Research measures only: rankings here say nothing about teaching, admissions or student experience. Comparable institutions and collaboration partners have tabs of their own, above.

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