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Sierra Leone vs Zimbabwe

On research quality in 2022-now, Zimbabwe ranks #75 in the world and Sierra Leone #112, of 189 countries. Sierra Leone stands higher in 0 of the 10 fields both publish in, Zimbabwe in 10.

Research profiles alike: 0.91very similar shapes of research, whatever their size. How it is measured

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Sierra Leone

World rank, 2022-now
#112
#98 all time
Works, 2022-now
1.1k
fractional
Top-10% rate
6.6%
share of its work among the world's most cited
Open access
68%
of its works free to read

Strongest relative focus: Horticulture, Applied Microbiology and Biotechnology, Development.

Zimbabwe

World rank, 2022-now
#75
#82 all time
Works, 2022-now
7.2k
fractional
Top-10% rate
6.9%
share of its work among the world's most cited
Open access
52%
of its works free to read

Strongest relative focus: Fuel Technology, Archeology, Public Administration.

Who leads, measure by measure?

Sierra Leone leads on 4 of 9 measures: excellence for its fields, open access, international co-authorship and growth. Zimbabwe leads on 4 of 9 measures: research quality, output, top-10% rate and citations per work. The two are level on institutions in the world top 100.

Sierra Leone 41 level4 Zimbabwe
  1. #112Research qualityworld rank of 189 countries, 2022-now#75
  2. 0.93×Excellence for its fieldsits top-10% rate against what its topics predict; 1.00× is as expected0.83×
  3. 1.1kOutputfractional works, 2022-now7.2k
  4. 6.6%Top-10% rateshare of its works among the world's most cited6.9%
  5. 8.9Citations per workall time, per fractional work10.3
  6. 0World top 100institutions it holds among the world's best 1000
  7. 68%Open accessof its works free to read, all time52%
  8. 39%Internationalof its works written with co-authors abroad, all time31%
  9. +104%Growthworks in 2022-25 against 2018-21; half a bar is no change+51%

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, excellence and the top-10% rate are explained in the methodology.

Who leads in each field?

Sierra Leone stands higher in 0 of 10 fields, Zimbabwe in 10. Zimbabwe leads most in Medicine (#62 against #99). Each bar is that side's standing among all countries ranked in the field: the full bar is first place.

Sierra Leone 010 Zimbabwe
  1. -Agricultural and Biological Sciences#74
  2. -Business, Management and Accounting#76
  3. -Computer Science#87
  4. -Economics, Econometrics and Finance#70
  5. -Engineering#97
  6. -Environmental Science#85
  7. -Health Professions#72
  8. #99Medicine#62
  9. -Psychology#79
  10. #107Social Sciences#72

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 Sierra Leone rankZimbabwe rank Sierra Leone top 10%Zimbabwe top 10% Sierra Leone worksZimbabwe works
Agricultural and Biological Sciences - #74 - 7.3% - 623
Business, Management and Accounting - #76 - 6.0% - 548
Computer Science - #87 - 6.8% - 336
Economics, Econometrics and Finance - #70 - 4.6% - 367
Engineering - #97 - 4.3% - 677
Environmental Science - #85 - 4.8% - 509
Health Professions - #72 - 9.9% - 276
Medicine #99 #62 8.7% 9.9% 209 785
Psychology - #79 - 4.9% - 210
Social Sciences #107 #72 5.1% 7.3% 209 2k

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.

Sierra Leone

▲ 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. Epidemiology78▲ 1.48×79 topics
  2. Economic Growth68▲ 6.3×21 topics
  3. Climate Change66▲ 1.86×62 topics
  4. Globalization59▲ 2.3×48 topics
  5. Sustainability56▲ 1.76×50 topics
  6. Public Health45▲ 2.4×40 topics
  7. Environmental Impact41▲ 1.83×44 topics
  8. Fiscal Policy40▲ 15×6 topics
  9. Vaccine38▲ 7.3×10 topics
  10. Maternal Mortality37▲ 13×5 topics
  11. Governance36▲ 8.5×9 topics
  12. Pathogenesis36▲ 5.4×18 topics
  13. Immune Response36▲ 4.8×12 topics
  14. Community Health Workers35▲ 30×2 topics
  15. Health Inequalities34▲ 21×3 topics
  16. Poverty Reduction33▲ 19×5 topics
  17. Child Mortality32▲ 34×1 topic
  18. Health Systems32▲ 34×1 topic
  19. Institutional Quality31▲ 23×2 topics
  20. Economic Development30▲ 2.9×20 topics
  21. Risk Management30▲ 4.8×10 topics
  22. Infectious Diseases28▲ 6.4×8 topics
  23. Smallholder Farmers28▲ 10×5 topics
  24. Genetic Diversity27▲ 4.7×17 topics
  25. Regulation26▲ 3.8×11 topics
  26. Transmission26▲ 36×3 topics
  27. Outbreak24▲ 49×2 topics
  28. Adaptation24▲ 6.2×7 topics
  29. Ebola Virus24▲ 65×1 topic
  30. Reservoirs24▲ 65×1 topic
  31. ICT22▲ 13×3 topics
  32. Corruption22▲ 11×6 topics
  33. Gender Equality21▲ 5.8×11 topics
  34. Global Burden of Disease21▲ 6.4×4 topics
  35. Monetary Policy21▲ 6.6×7 topics
  36. Inequality20▲ 6.8×5 topics
  37. Global Health20▲ 9.6×4 topics
  38. Finance20▲ 8.1×3 topics
  39. Inclusive Development19▲ 33×2 topics
  40. Knowledge Economy18▲ 13×2 topics

Zimbabwe

▲ 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. Colonialism557▲ 14×23 topics
  2. Social Justice455▲ 9.1×35 topics
  3. Nationalism444▲ 12×15 topics
  4. Sustainability430▲ 2.1×96 topics
  5. Political Economy415▲ 19×14 topics
  6. Climate Change406▲ 1.79×108 topics
  7. Land Reform389▲ 99×2 topics
  8. History388▲ 6.7×13 topics
  9. Agrarian Relations362▲ 470×1 topic
  10. Zimbabwe362▲ 470×1 topic
  11. Sustainable Development355▲ 2.7×84 topics
  12. Globalization319▲ 1.94×104 topics
  13. Social Capital236▲ 5.4×18 topics
  14. Environmental Impact225▲ 1.58×65 topics
  15. Mental Health203▲ 1.70×41 topics
  16. COVID-19196▲ 1.81×29 topics
  17. Economic Growth190▲ 2.8×30 topics
  18. Higher Education180▲ 4.0×27 topics
  19. Human Rights179▲ 2.1×51 topics
  20. Poverty Reduction175▲ 16×6 topics
  21. Innovation173▲ 2.0×56 topics
  22. Digital Transformation161▲ 3.6×22 topics
  23. Economic Development157▲ 2.4×38 topics
  24. Development142▲ 4.8×17 topics
  25. Sustainable Agriculture134▲ 5.2×14 topics
  26. Gender Inequality128▲ 11×6 topics
  27. Social Impact128▲ 3.9×15 topics
  28. Vulnerability125▲ 6.4×8 topics
  29. Poverty Alleviation124▲ 16×2 topics
  30. Antiretroviral Therapy122▲ 9.0×6 topics
  31. Rural Development122▲ 4.2×15 topics
  32. Health Equity115▲ 4.7×6 topics
  33. Land Tenure114▲ 33×2 topics
  34. Smallholder Farmers107▲ 6.1×6 topics
  35. Postcolonialism93▲ 7.8×10 topics
  36. Urban Poverty87▲ 24×2 topics
  37. Housing Policy87▲ 37×1 topic
  38. Slum Upgrading87▲ 37×1 topic
  39. Decolonization86▲ 13×7 topics
  40. Community Health Workers84▲ 11×2 topics

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?

Zimbabwe has out-published Sierra Leone every year since 1980.

still counting1k2k3kZimbabwe2,138 in 2025Sierra Leone311 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 counting0.020%0.040%Zimbabwe0.036% in 2025Sierra Leone0.0053% 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%Sierra Leone8.3% in 2025Zimbabwe7.9% 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.

Sierra Leone 05 level0 Zimbabwe
  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, Sierra Leone or Zimbabwe?

Zimbabwe publishes 6.6× as much research as Sierra Leone in 2022-now (7.2k against 1.1k fractional works).

Whose research has more impact, Sierra Leone or Zimbabwe?

6.9% of Zimbabwe's research reaches the world's top 10% most cited, against 6.6% for Sierra Leone.

Is Sierra Leone or Zimbabwe growing faster?

Output in 2022-25 was +104% against 2018-21 for Sierra Leone, and +51% for Zimbabwe.

Which has more open access research, Sierra Leone or Zimbabwe?

68% of Sierra Leone's research is free to read, against 52% of Zimbabwe's.

Which has more world-class institutions, Sierra Leone or Zimbabwe?

Sierra Leone holds 0 of the world's top 100 research institutions and Zimbabwe 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%.

Sierra Leone

  1. 1University of Sierra Leone5.1% top 10% · 501 works
  2. 2Njala University6.9% top 10% · 307 works
  3. 3University of Makeni5.7% top 10% · 66 works
  4. 4Sierra Leone Agricultural Research Institute7.9% top 10% · 73 works

Zimbabwe

  1. 1University of Zimbabwe6.5% top 10% · 1.5k works
  2. 2National University of Science and Technology6.3% top 10% · 1.2k works
  3. 3Great Zimbabwe University5.6% top 10% · 524 works
  4. 4Midlands State University6.6% top 10% · 1.1k works
  5. 5Chinhoyi University of Technology6.9% top 10% · 389 works
  6. 6Harare Institute of Technology3.4% top 10% · 228 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.

Sierra Leone

  1. 1 Haja Ramatulai Wurie #161,092 worldwide 2.4k citations · 68 works
  2. 2 Amara Jambai #176,221 worldwide 3.4k citations · 97 works
  3. 3 Rashid Ansumana #239,551 worldwide 4.4k citations · 163 works
  4. 4 Abdul Salami Bah #270,549 worldwide 111 citations · 29 works
  5. 5 Augustus Osborne #296,042 worldwide 4k citations · 162 works

Zimbabwe

  1. 1 Jephat Chifamba #20,133 worldwide 23k citations · 165 works
  2. 2 Brighton Nyagadza #68,624 worldwide 1.6k citations · 133 works
  3. 3 Régis Chikowo #103,612 worldwide 6.2k citations · 178 works
  4. 4 Christian Thierfelder #135,188 worldwide 10k citations · 271 works
  5. 5 Willis Gwenzi #170,977 worldwide 8.2k citations · 219 works