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Nigeria vs Tanzania

On research quality in 2022-now, Tanzania ranks #64 in the world and Nigeria #101, of 189 countries. Nigeria stands higher in 11 of the 26 fields both publish in, Tanzania in 15.

Research profiles alike: 0.85very similar shapes of research, whatever their size. How it is measured

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Nigeria

World rank, 2022-now
#101
#104 all time
Works, 2022-now
134k
fractional
Top-10% rate
4.9%
share of its work among the world's most cited
Open access
70%
of its works free to read

Strongest relative focus: Library and Information Sciences, Drug Discovery, Chemical Health and Safety.

Tanzania

World rank, 2022-now
#64
#74 all time
Works, 2022-now
17k
fractional
Top-10% rate
7.7%
share of its work among the world's most cited
Open access
69%
of its works free to read

Strongest relative focus: Library and Information Sciences, Applied Microbiology and Biotechnology, Parasitology.

Who leads, measure by measure?

Tanzania leads on 6 of 9 measures: research quality, citation excellence for its fields, top-10% rate, citations per work, international co-authorship and growth. Nigeria leads on 1 of 9 measures: output. The two are level on institutions in the world top 100 and open access.

Nigeria 12 level6 Tanzania
  1. #101Research qualityworld rank of 189 countries, 2022-now#64
  2. 0.52×Citation excellence for its fieldsits top-10% rate against what its topics predict; 1.00× is as expected0.90×
  3. 134kOutputfractional works, 2022-now17k
  4. 4.9%Top-10% rateshare of its works among the world's most cited7.7%
  5. 7.4Citations per workall time, per fractional work14.6
  6. 0World top 100institutions it holds among the world's best 1000
  7. 70%Open accessof its works free to read, all time69%
  8. 16%Internationalof its works written with co-authors abroad, all time30%
  9. +22%Growthworks in 2022-25 against 2018-21; half a bar is no change+101%

A rank is drawn as its standing: the longer the bar, the nearer the top. Anything else is drawn against the larger of the two, and two values a hair apart are called level. Quality, citation excellence and the top-10% rate are explained in the methodology.

Who leads in each field?

Nigeria stands higher in 11 of 26 fields, Tanzania in 15. Tanzania leads most in Agricultural and Biological Sciences (#50 against #103). Each bar is that side's standing among all countries ranked in the field: the full bar is first place.

Nigeria 1115 Tanzania
  1. #103Agricultural and Biological Sciences#50
  2. #80Arts and Humanities#65
  3. #93Biochemistry, Genetics and Molecular Biology#63
  4. #92Business, Management and Accounting#59
  5. #42Chemical Engineering-
  6. #63Chemistry-
  7. #112Computer Science#78
  8. #70Decision Sciences#51
  9. #60Dentistry-
  10. #66Earth and Planetary Sciences-
  11. #79Economics, Econometrics and Finance#62
  12. #71Energy-
  13. #96Engineering#84
  14. #105Environmental Science#66
  15. #85Health Professions#50
  16. #59Immunology and Microbiology#41
  17. #74Materials Science-
  18. #75Mathematics-
  19. #84Medicine#49
  20. #65Neuroscience-
  21. #59Nursing#44
  22. #43Pharmacology, Toxicology and Pharmaceutics-
  23. #74Physics and Astronomy-
  24. #95Psychology#67
  25. #113Social Sciences#66
  26. #29Veterinary-

Standing is the percentile of world rank within each field, 2022-now; the printed number is the rank itself. A dash means the field is too small there to rank. How sides are compared.

The numbers behind each field

Click a heading to sort. The side that does better in a pair of columns is shaded: a lower rank, a higher rate, more works.

Field Nigeria rankTanzania rank Nigeria top 10%Tanzania top 10% Nigeria worksTanzania works
Agricultural and Biological Sciences #103 #50 4.0% 9.3% 14k 1.8k
Arts and Humanities #80 #65 8.7% 9.3% 2.8k 341
Biochemistry, Genetics and Molecular Biology #93 #63 4.5% 7.8% 4.6k 451
Business, Management and Accounting #92 #59 4.9% 7.3% 7.7k 1.4k
Chemical Engineering #42 - 6.5% - 200 -
Chemistry #63 - 6.0% - 1.6k -
Computer Science #112 #78 5.7% 7.5% 8k 773
Decision Sciences #70 #51 4.8% 3.7% 2k 353
Dentistry #60 - 3.5% - 409 -
Earth and Planetary Sciences #66 - 5.8% - 1.5k -
Economics, Econometrics and Finance #79 #62 5.0% 6.2% 6.5k 768
Energy #71 - 4.2% - 1.7k -
Engineering #96 #84 4.9% 6.5% 14k 964
Environmental Science #105 #66 4.4% 6.8% 10k 1.4k
Health Professions #85 #50 6.1% 10.9% 4.3k 630
Immunology and Microbiology #59 #41 5.0% 10.6% 1.3k 256
Materials Science #74 - 6.6% - 2.8k -
Mathematics #75 - 6.3% - 1.9k -
Medicine #84 #49 4.1% 8.1% 21k 3.1k
Neuroscience #65 - 5.2% - 739 -
Nursing #59 #44 3.3% 8.3% 1.9k 220
Pharmacology, Toxicology and Pharmaceutics #43 - 3.3% - 1.3k -
Physics and Astronomy #74 - 4.6% - 673 -
Psychology #95 #67 4.4% 6.5% 3.5k 434
Social Sciences #113 #66 5.7% 7.4% 20k 3.4k
Veterinary #29 - 2.6% - 255 -

What is each known for?

The keywords that describe each side's research, by fractional works in 2022-now and weighted toward what it does more of than the world.

Nigeria

▲ more of its work than of the world's◆ about the world's share▼ less than the world's
All 40 words, with their numbers
  1. Epidemiology6,992◆ 1.09×140 topics
  2. Sustainability6,209▲ 1.58×131 topics
  3. Environmental Impact6,008▲ 2.2×72 topics
  4. Education5,751▲ 2.1×146 topics
  5. Machine Learning5,438◆ 1.02×97 topics
  6. Sustainable Development5,257▲ 2.1×108 topics
  7. Globalization4,985▲ 1.58×173 topics
  8. Climate Change4,966◆ 1.14×127 topics
  9. Renewable Energy4,353▲ 1.87×61 topics
  10. Economic Growth4,324▲ 3.3×38 topics
  11. Oxidative Stress3,687▲ 1.39×63 topics
  12. Antioxidant3,412▲ 3.1×51 topics
  13. Development3,202▲ 5.6×23 topics
  14. Gender Equality3,084▲ 6.8×18 topics
  15. Corporate Governance2,913▲ 2.5×32 topics
  16. Risk Management2,754▲ 3.6×20 topics
  17. Curriculum Development2,746▲ 2.5×20 topics
  18. Antioxidant Activity2,743▲ 2.7×32 topics
  19. Nigeria2,734▲ 79×3 topics
  20. Information Technology2,674▲ 3.5×32 topics
  21. Medicinal Plants2,492▲ 4.0×21 topics
  22. Social Capital2,408▲ 2.9×20 topics
  23. Genetic Diversity2,394▲ 3.4×22 topics
  24. Antioxidants2,137▲ 3.0×17 topics
  25. Teacher Education2,125▲ 10×8 topics
  26. Toxicity2,107▲ 3.0×20 topics
  27. Governance2,098▲ 4.0×19 topics
  28. Quality Assurance2,067▲ 7.6×9 topics
  29. Fiscal Policy2,016▲ 6.2×11 topics
  30. Bioactive Compounds1,971▲ 4.9×15 topics
  31. Youth Unemployment1,884▲ 99×1 topic
  32. ICT1,763▲ 8.2×5 topics
  33. Institutional Quality1,723▲ 10×3 topics
  34. Inequality1,694▲ 4.6×18 topics
  35. Smallholder Farmers1,669▲ 4.9×6 topics
  36. Knowledge Economy1,451▲ 8.3×11 topics
  37. Mobile Phones1,415▲ 19×3 topics
  38. Inclusive Development1,410▲ 20×2 topics
  39. financial access1,397▲ 22×1 topic
  40. gender inclusion1,397▲ 22×1 topic

Tanzania

▲ more of its work than of the world's◆ about the world's share▼ less than the world's
All 40 words, with their numbers
  1. Epidemiology1,175▲ 1.47×137 topics
  2. Climate Change1,053▲ 1.93×111 topics
  3. Sustainability1,002▲ 2.0×102 topics
  4. Globalization626▲ 1.58×121 topics
  5. Environmental Impact569▲ 1.66×66 topics
  6. Sustainable Development542▲ 1.72×94 topics
  7. Education539▲ 1.56×102 topics
  8. Social Capital536▲ 5.1×20 topics
  9. Poverty Reduction482▲ 18×6 topics
  10. Supply Chain Management418▲ 2.3×25 topics
  11. Economic Development413▲ 2.6×37 topics
  12. Sustainable Agriculture403▲ 6.5×16 topics
  13. Smallholder Farmers396▲ 9.3×6 topics
  14. Rural Development392▲ 5.7×18 topics
  15. Risk Management370▲ 3.9×16 topics
  16. Gender Equality364▲ 6.4×16 topics
  17. Maternal Mortality351▲ 7.8×5 topics
  18. Community Health Workers335▲ 19×2 topics
  19. Food Security334▲ 3.1×23 topics
  20. Social Networks325▲ 6.0×10 topics
  21. Gender Inequality310▲ 11×7 topics
  22. Technology Integration307▲ 4.8×11 topics
  23. Development289▲ 4.0×21 topics
  24. Health Inequalities284▲ 12×5 topics
  25. Socio-economic Factors278▲ 12×3 topics
  26. Technology Adoption276▲ 7.4×6 topics
  27. Adaptation273▲ 4.5×14 topics
  28. Child Mortality272▲ 19×1 topic
  29. Health Systems272▲ 19×1 topic
  30. Antiretroviral Therapy235▲ 7.2×6 topics
  31. Agricultural Innovation233▲ 25×2 topics
  32. Livelihood Diversification229▲ 36×1 topic
  33. Market Participation229▲ 36×1 topic
  34. Empowerment222▲ 11×6 topics
  35. Primary Education218▲ 27×2 topics
  36. Conditional Cash Transfers218▲ 31×1 topic
  37. School Subsidies218▲ 31×1 topic
  38. Poverty Alleviation215▲ 11×3 topics
  39. Financial Inclusion209▲ 20×1 topic
  40. Microfinance209▲ 20×1 topic

Size is fractional works in the topics tagged with each word; colour is the word's share of the side's work against its share of the world's. Each word links to the topic it comes from most.

How has their output grown?

Nigeria has out-published Tanzania every year since 1980.

still counting20k40kNigeria40k in 2025Tanzania5,567 in 20251990200020102020

Fractional works per year.

Their share of all research

Growing output can still be a shrinking share, because all of science grows. Each line is a side as a percentage of every work published that year.

still counting0.25%0.50%0.75%Nigeria0.67% in 2025Tanzania0.095% in 202519801990200020102020

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

How much of it reaches the world top 10%

The share of each side's works, year by year, that reached the world's 10% most cited for their field and year. The average of all institutions is 10.0% (why not 10%).

still counting5%10%15%Tanzania8.0% in 2025Nigeria4.6% in 2025200020102020

A year with under 1% of the side's peak output is left out: a rate over a handful of papers says nothing. The latest years are still being cited.

Who holds more of the world's best institutions?

A country's average quality and the number of institutions it holds at the very top can disagree, and both are worth knowing. The counts are nested: an institution in the top 50 is also in the top 100.

Nigeria 05 level0 Tanzania
  1. 0In the world top 500
  2. 0In the top 1000
  3. 0In the top 5000
  4. 0In the top 1,0000
  5. #51Elite capacityrank among 204 countries#51

Institutions ranked on research quality, 2022-now. Elite capacity counts a country's institutions by their worldwide rank, weighted so a place at #1 counts for more than one at #480.

Which publishes more research, Nigeria or Tanzania?

Nigeria publishes 7.9× as much research as Tanzania in 2022-now (134k against 17k fractional works).

Whose research has more impact, Nigeria or Tanzania?

7.7% of Tanzania's research reaches the world's top 10% most cited, against 4.9% for Nigeria.

Is Nigeria or Tanzania growing faster?

Output in 2022-25 was +101% against 2018-21 for Tanzania, and +22% for Nigeria.

Which has more open access research, Nigeria or Tanzania?

70% of Nigeria's research is free to read, against 69% of Tanzania's.

Which has more world-class institutions, Nigeria or Tanzania?

Nigeria holds 0 of the world's top 100 research institutions and Tanzania 0; in the top 1,000 it is 0 against 0.

Which institutions lead in each country?

The highest-ranked institutions on each side on research quality, 2022-now. The percentage is each institution's own top-10% rate: the share of its works that are among the world's 10% most cited for their field and year. Every figure stands alone, so they do not add up to 100%.

Nigeria

  1. 1Covenant University7.9% top 10% · 1.6k works
  2. 2Lead City University4.8% top 10% · 1k works
  3. 3Adekunle Ajasin University5.6% top 10% · 1k works
  4. 4Redeemer's University8.4% top 10% · 599 works
  5. 5University of Lagos5.2% top 10% · 3.6k works
  6. 6University of Ibadan6.0% top 10% · 5.8k works

Tanzania

  1. 1University of Dar es Salaam7.5% top 10% · 2.6k works
  2. 2The University of Dodoma12.5% top 10% · 1.8k works
  3. 3Muhimbili University of Health and Allied Sciences8.3% top 10% · 928 works
  4. 4Mzumbe University8.5% top 10% · 684 works
  5. 5Nelson Mandela African Institution of Science and Technology11.1% top 10% · 566 works
  6. 6Mbeya University of Science and Technology7.2% top 10% · 439 works

The number is the rank inside the country. The track on each row is the top-10% rate; the tick is the average of all institutions, 10.0% (how it is set): teal above it, red below. The ranking is the quality score, which compares the rate with what each institution's own topics predict and adds a small reward for size, so the rates do not fall in order.

Who are the top researchers on each side?

The most cited researchers on each side, among those ranked.

Nigeria

  1. 1 Michael Ekholuenetale #7,006 worldwide 69k citations · 215 works
  2. 2 Olayinka Stephen Ilesanmi #10,324 worldwide 161k citations · 355 works
  3. 3 Mu’awiyyah Babale Sufiyan #10,737 worldwide 123k citations · 106 works
  4. 4 Oye Gureje #14,357 worldwide 94k citations · 694 works
  5. 5 Aminu Shittu #16,229 worldwide 34k citations · 108 works

Tanzania

  1. 1 Andrew R. Williamson #1,536 worldwide 85k citations · 325 works
  2. 2 Audax Z. P. Mabulla #25,355 worldwide 9.3k citations · 201 works
  3. 3 Susan F. Rumisha #33,455 worldwide 37k citations · 167 works
  4. 4 Gerry F. Killeen #34,603 worldwide 16k citations · 207 works
  5. 5 Fredros O. Okumu #46,417 worldwide 6.3k citations · 186 works