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Science in Bulgaria

Bulgaria ranks #73 of 192 countries on research quality in 2022–2025 (#57 all time), with 36k research works and 8.4% of them in the world's top 10%.

World rank, 2022–2025
#73
of 192 · #57 all time
Works, 2022–2025
36k
▲ 60% vs 2013–17
Top-10% rate
8.4%
record average 16.5%
In the world top 100
0
0 in the top 1,000
Open access
44%
world 63%

What is Bulgaria strongest at in science?

On research quality in 2022–2025, Bulgaria ranks highest in Medicine (#67 of 155), Social Sciences (#75 of 151) and Engineering (#72 of 134). Relative to its size it is most specialised in General Energy, Tourism, Leisure and Hospitality Management and Numerical Analysis.

FieldWorld rankWhere that sitsTop-10% rateWorks
MedicineField #67 of 155 7.0%5,889 Institutions
Social SciencesField #75 of 151 11.8%3,337 Institutions
EngineeringField #72 of 134 4.8%6,202 Institutions
Biochemistry, Genetics and Molecular BiologyField #60 of 108 10.5%1,617 Institutions
Computer ScienceField #75 of 131 7.7%3,146 Institutions
Political Science and International RelationsSubfield #61 of 97 13.6%601 Institutions
Sociology and Political ScienceSubfield #77 of 122 12.0%1,014 Institutions
Environmental ScienceField #80 of 125 7.7%1,854 Institutions
Business, Management and AccountingField #76 of 113 11.2%1,211 Institutions
Materials ScienceField #62 of 90 6.1%1,140 Institutions
Agricultural and Biological SciencesField #87 of 126 10.8%2,543 Institutions
PsychologyField #76 of 109 10.1%722

Where its research is concentrated

Location quotient: how much more — or less — of each node it does than its size predicts. Drawn around 1×, where “twice the world share” and “half of it” are the same distance apart in opposite directions. A volume reading, which on a country axis is largely population and industrial structure.

  1. General EnergySubfield · 48.3 works5.0×
  2. Tourism, Leisure and Hospitality ManagementSubfield · 32.1 works4.0×
  3. Numerical AnalysisSubfield · 116.4 works3.8×
  4. AnatomySubfield · 27.4 works3.2×
  5. ClassicsSubfield · 65.8 works3.1×
  6. General Materials ScienceSubfield · 47.7 works3.1×
  7. General DentistrySubfield · 44.5 works2.9×
  8. Algebra and Number TheorySubfield · 59.5 works2.6×
← less than its size predicts1×more →

The whole field profile

All 26 fields at once. A specialist and a generalist produce the same ranked list and a completely different shape.

Agricultural and Biological Sciences: 1.50× its world share, 2,543 worksAgricultural and Bio…Biochemistry, Genetics and Molecular Biology: 0.85× its world share, 1,617 worksBiochemistry, Geneti…Immunology and Microbiology: 0.93× its world share, 336 worksImmunology and Micro…Neuroscience: 0.75× its world share, 435 worksNeurosciencePharmacology, Toxicology and Pharmaceutics: 1.23× its world share, 155 worksPharmacology, Toxico…Chemical Engineering: 0.93× its world share, 116 worksChemical EngineeringChemistry: 1.12× its world share, 626 worksChemistryComputer Science: 1.13× its world share, 3,146 worksComputer ScienceEarth and Planetary Sciences: 1.35× its world share, 756 worksEarth and Planetary …Energy: 1.29× its world share, 424 worksEnergyEngineering: 1.16× its world share, 6,202 worksEngineeringEnvironmental Science: 1.04× its world share, 1,854 worksEnvironmental ScienceMaterials Science: 0.91× its world share, 1,140 worksMaterials ScienceMathematics: 1.72× its world share, 722 worksMathematicsPhysics and Astronomy: 1.03× its world share, 817 worksPhysics and AstronomyDentistry: 2.36× its world share, 410 worksDentistryHealth Professions: 0.72× its world share, 674 worksHealth ProfessionsMedicine: 0.86× its world share, 5,889 worksMedicineNursing: 0.99× its world share, 174 worksNursingVeterinary: 1.39× its world share, 68 worksVeterinaryArts and Humanities: 1.01× its world share, 1,039 worksArts and HumanitiesBusiness, Management and Accounting: 1.05× its world share, 1,211 worksBusiness, Management…Decision Sciences: 1.19× its world share, 412 worksDecision SciencesEconomics, Econometrics and Finance: 1.21× its world share, 926 worksEconomics, Econometr…Psychology: 0.66× its world share, 722 worksPsychologySocial Sciences: 0.74× its world share, 3,337 worksSocial Sciences1×world share
more than its size predictsabout as predictedless

Rings at 0.5×, 1× and 2×. Widest outward: Dentistry, 2.4×. Every wedge is a field page.

Which keywords describe research in Bulgaria?

By fractional works in 2022–2025, weighted toward what it does more of than the world: Sustainable Development, Renewable Energy, Climate Change, Sustainability, Machine Learning, Energy Efficiency, Artificial Intelligence and Epidemiology.

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

Size is fractional works in 2022–2025 in the topics tagged with each word; colour is the word's share of this country'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. Machine Learning1,286◆ 1.10×97 topics
  2. Climate Change1,281▲ 1.33×122 topics
  3. Epidemiology1,231◆ 0.87×138 topics
  4. Sustainability1,163▲ 1.33×126 topics
  5. Sustainable Development1,095▲ 1.93×106 topics
  6. Renewable Energy1,049▲ 2.0×60 topics
  7. Deep Learning1,017▼ 0.83×85 topics
  8. Artificial Intelligence823▲ 1.68×65 topics
  9. Energy Efficiency719▲ 2.1×46 topics
  10. Environmental Impact709▲ 1.17×73 topics
  11. Oxidative Stress666◆ 1.14×62 topics
  12. Neural Networks643▲ 1.17×42 topics
  13. Globalization632◆ 0.90×163 topics
  14. Big Data625▲ 1.93×35 topics
  15. Inflammation613▼ 0.82×83 topics
  16. Educational Technology543▲ 1.28×44 topics
  17. Innovation534▲ 1.42×84 topics
  18. Remote Sensing517▲ 1.17×41 topics
  19. Economic Growth504▲ 1.66×36 topics
  20. Internet of Things498▲ 1.60×31 topics
  21. Antioxidant440▲ 1.80×51 topics
  22. Supply Chain Management415▲ 1.25×27 topics
  23. E-Learning405◆ 1.13×25 topics
  24. Cyber-Physical Systems393▲ 4.2×9 topics
  25. Biodiversity384▲ 1.44×38 topics
  26. Digital Transformation364▲ 1.92×32 topics
  27. Security357▲ 1.53×29 topics
  28. Antioxidant Activity354▲ 1.56×32 topics
  29. Environmental Management354▲ 2.5×21 topics
  30. Smart Grid315▲ 2.3×10 topics
  31. Invasive Species309▲ 2.0×21 topics
  32. Optimization302▲ 1.82×26 topics
  33. Power Electronics269▲ 2.3×8 topics
  34. Flavonoids241▲ 2.6×12 topics
  35. Economic Security223▲ 2.9×7 topics
  36. Control Systems215▲ 3.2×12 topics
  37. Mediterranean186▲ 5.7×6 topics
  38. Black Sea144▲ 10×2 topics
  39. Caspian Sea140▲ 13×1 topic
  40. paleoceanography140▲ 13×1 topic

Which universities in Bulgaria lead research?

Bulgarian Academy of Sciences, Medical University of Sofia and Sofia University "St. Kliment Ohridski" rank highest in Bulgaria on research quality in 2022–2025.

0%10%20%mean 9.74%fractional works (log) →share in the world top 10% →Bulgarian Academy of Sciences: 3,346, 10.2%Medical University of Sofia: 1,614, 9.5%Sofia University "St. Kliment Ohridski": 2,343, 10.6%Medical University Plovdiv: 1,202, 13.1%Medical University of Varna: 1,546, 4.9%Technical University of Sofia: 2,858, 4.6%Trakia University: 1,134, 6.0%Plovdiv University: 723, 12.6%College of Tourism: 779, 14.7%Institute of Mathematics and Informatics: 472, 10.6%Angel Kanchev University of Ruse: 1,112, 8.1%University of Chemical Technology and Metallurgy: 398, 5.3%Institute of Polymers: 176, 11.7%Institute of Neurobiology: 163, 15.8%University of Food Technologies: 468, 8.4%Medical University P…Sofia University "St…Bulgarian Academy of…Medical University o…
above the meannear itbelow it

One dot per institution in the list below. The upper left is the interesting corner.

  1. 1Bulgarian Academy of SciencesGovernment institution · Sofia · #1,986 worldwide10.2% top 10% · 3.3k works
  2. 2Medical University of SofiaUniversity · Sofia · #2,349 worldwide9.5% top 10% · 1.6k works
  3. 3Sofia University "St. Kliment Ohridski"University · Sofia · #2,714 worldwide10.6% top 10% · 2.3k works
  4. 4Medical University PlovdivUniversity · Plovdiv · #3,904 worldwide13.1% top 10% · 1.2k works
  5. 5Medical University of VarnaUniversity · Varna · #5,082 worldwide4.9% top 10% · 1.5k works
  6. 6Technical University of SofiaUniversity · Sofia · #6,020 worldwide4.6% top 10% · 2.9k works
  7. 7Trakia UniversityUniversity · Stara Zagora · #6,721 worldwide6.0% top 10% · 1.1k works
  8. 8Plovdiv UniversityUniversity · Plovdiv · #6,776 worldwide12.6% top 10% · 723 works
  9. 9College of TourismUniversity · Blagoevgrad · #6,949 worldwide14.7% top 10% · 779 works
  10. 10Institute of Mathematics and InformaticsResearch facility · Sofia · #8,327 worldwide10.6% top 10% · 472 works
  11. 11Angel Kanchev University of RuseUniversity · Rousse · #8,746 worldwide8.1% top 10% · 1.1k works
  12. 12University of Chemical Technology and MetallurgyUniversity · Sofia · #8,826 worldwide5.3% top 10% · 398 works
  13. 13Institute of PolymersResearch facility · Sofia · #9,219 worldwide11.7% top 10% · 176 works
  14. 14Institute of NeurobiologyResearch facility · Sofia · #9,346 worldwide15.8% top 10% · 163 works
  15. 15University of Food TechnologiesUniversity · Plovdiv · #9,827 worldwide8.4% top 10% · 468 works

The track on each row is its top-10% rate; the tick is the world’s rate in this record, 16.5% — teal above it, red below.

All ranked institutions in Bulgaria

Who are the top researchers in Bulgaria?

Griffith Edwards, E. G. J. Olsen and Nikolay Tzvetkov rank highest among researchers based in Bulgaria.

  1. 1 Griffith Edwards · #12,349 worldwide 706 citations · 112 works
  2. 2 E. G. J. Olsen · #15,832 worldwide 705 citations · 45 works
  3. 3 Nikolay Tzvetkov · #16,224 worldwide 776 citations · 50 works
  4. 4 Мarin Georgiev · #22,240 worldwide 245 citations · 60 works
  5. 5 A. F. J. Klijn · #27,189 worldwide 106 citations · 72 works
  6. 6 Stanislav V. Vassilev · #28,932 worldwide 516 citations · 47 works
  7. 7 A. Cabrera · #32,002 worldwide 1.2k citations · 96 works
  8. 8 V. N. Popov · #34,989 worldwide 789 citations · 61 works
  9. 9 Martin Rhodes · #35,373 worldwide 595 citations · 89 works
  10. 10 Nikolay V. Vitanov · #37,918 worldwide 651 citations · 81 works
Top researchers in Bulgaria

Which cities in Bulgaria are research hubs?

  1. 1 Sofia Bulgaria 121k works

How open and international is Bulgaria's research?

44% of its research is openly available (world: 40%), and 24% is written with international co-authors (world: 18%).

openly available44.4%not open55.6%

World: 63% of research is openly available.

with international co-authors23.8%domestic only76.2%

World: 22% is written across borders.

How has Bulgaria's research grown?

Output in 2018–2022 was 60% higher than in 2013–2017.

1990200020102020
grewheldshrank

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

Research fields in Bulgaria