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Chad vs Mauritania

On research quality in 2022-now, Chad ranks #168 in the world and Mauritania #184, of 189 countries.

Research profiles alike: 0.67similar shapes of research, whatever their size. How it is measured

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Chad

World rank, 2022-now
#168
#171 all time
Works, 2022-now
545
fractional
Top-10% rate
4.2%
share of its work among the world's most cited
Open access
79%
of its works free to read

Strongest relative focus: Forestry, Ecology, Evolution, Behavior and Systematics, Geochemistry and Petrology.

Mauritania

World rank, 2022-now
#184
#192 all time
Works, 2022-now
269
fractional
Top-10% rate
6.2%
share of its work among the world's most cited
Open access
55%
of its works free to read

Strongest relative focus: Forestry, Applied Mathematics, Modeling and Simulation.

Who leads, measure by measure?

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

Chad 41 level4 Mauritania
  1. #168Research qualityworld rank of 189 countries, 2022-now#184
  2. 0.75×Excellence for its fieldsits top-10% rate against what its topics predict; 1.00× is as expected0.86×
  3. 545Outputfractional works, 2022-now269
  4. 4.2%Top-10% rateshare of its works among the world's most cited6.2%
  5. 4.6Citations per workall time, per fractional work8.6
  6. 0World top 100institutions it holds among the world's best 1000
  7. 79%Open accessof its works free to read, all time55%
  8. 47%Internationalof its works written with co-authors abroad, all time56%
  9. +104%Growthworks in 2022-25 against 2018-21; half a bar is no change+36%

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.

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.

Chad

▲ 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. Epidemiology62▲ 2.3×83 topics
  2. Climate Change50▲ 2.8×47 topics
  3. Sustainability43▲ 2.6×36 topics
  4. Smallholder Farmers39▲ 28×6 topics
  5. Adaptation31▲ 16×5 topics
  6. Diversity26▲ 22×4 topics
  7. Livestock Farming26▲ 65×2 topics
  8. Agroecology26▲ 27×2 topics
  9. Agricultural Development25▲ 25×2 topics
  10. Multifunctionality25▲ 81×1 topic
  11. Work Organization25▲ 97×1 topic
  12. Renewable Energy20▲ 2.0×22 topics
  13. Immune Response19▲ 5.0×13 topics
  14. Public Health19▲ 1.92×34 topics
  15. Treatment19▲ 2.3×27 topics
  16. Genetic Diversity19▲ 6.4×15 topics
  17. Sustainable Agriculture18▲ 8.5×9 topics
  18. Remote Sensing17▲ 2.1×15 topics
  19. Antioxidant16▲ 3.5×26 topics
  20. Nutritional Value15▲ 20×2 topics
  21. Climate Resilience15▲ 38×3 topics
  22. Diabetes15▲ 4.4×11 topics
  23. Global Burden15▲ 4.1×12 topics
  24. Biodiversity Conservation14▲ 5.4×8 topics
  25. Governance13▲ 5.9×7 topics
  26. Agroforestry12▲ 27×4 topics
  27. Health Benefits12▲ 5.3×10 topics
  28. Indigenous Fruits12▲ 77×1 topic
  29. Tree Domestication12▲ 77×1 topic
  30. Vaccine12▲ 4.3×9 topics
  31. Global Burden of Disease10▲ 6.3×2 topics
  32. Maternal Mortality10▲ 6.9×5 topics
  33. Maternal and Child Undernutrition10▲ 19×1 topic
  34. Water Sanitation Hygiene10▲ 19×1 topic
  35. GIS10▲ 19×3 topics
  36. Antiviral Therapy9▲ 14×3 topics
  37. Antiretroviral Therapy9▲ 7.9×6 topics
  38. Community Health Workers9▲ 14×2 topics
  39. Institutional Quality9▲ 12×2 topics
  40. Liver Disease8▲ 14×2 topics

Mauritania

▲ 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. Epidemiology20▲ 1.54×55 topics
  2. Climate Change20▲ 2.2×41 topics
  3. Machine Learning17▲ 1.60×35 topics
  4. Deep Learning15▲ 1.34×32 topics
  5. Renewable Energy11▲ 2.4×22 topics
  6. Remote Sensing10▲ 2.5×17 topics
  7. Sustainability9◆ 1.11×22 topics
  8. Nonlinear Equations9▲ 21×3 topics
  9. Environmental Impact7▲ 1.34×19 topics
  10. Public Health7▲ 1.43×22 topics
  11. Smallholder Farmers7▲ 9.9×2 topics
  12. Fractional Laplacian6▲ 87×1 topic
  13. Immune Response6▲ 3.4×11 topics
  14. Sobolev Spaces6▲ 87×1 topic
  15. Biodiversity Conservation5▲ 4.3×4 topics
  16. Finite Element5▲ 35×2 topics
  17. Porous Media5▲ 11×3 topics
  18. Infectious Diseases5▲ 4.3×5 topics
  19. Population Dynamics4▲ 5.4×7 topics
  20. Agroforestry4▲ 20×1 topic
  21. Tree Domestication4▲ 60×1 topic
  22. Heterogeneous4▲ 37×1 topic
  23. Multiscale Methods4▲ 37×1 topic
  24. Conservation4▲ 2.9×10 topics
  25. Antiviral Therapy4▲ 13×3 topics
  26. Boundary Value Problems4▲ 24×3 topics
  27. Islam4▲ 5.9×3 topics
  28. Gender Equality4▲ 4.1×4 topics
  29. Migration4▲ 3.4×5 topics
  30. North Africa4▲ 32×2 topics
  31. Liver Disease4▲ 12×2 topics
  32. Poverty Reduction4▲ 8.5×3 topics
  33. Grid Integration4▲ 11×3 topics
  34. Controllability3▲ 23×2 topics
  35. Sea-Level Rise3▲ 7.8×4 topics
  36. Cancer Incidence3▲ 6.4×3 topics
  37. Marine Ecosystems3▲ 16×2 topics
  38. Empowerment2▲ 8.0×1 topic
  39. Fisheries Sustainability2▲ 9.1×2 topics
  40. Microfinance2▲ 15×1 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?

Chad has out-published Mauritania every year since 2017, when it overtook it.

still counting100200300Chad151 in 2025Mauritania80 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 counting0.0050%0.010%Chad0.0026% in 2025Mauritania0.0014% 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%Mauritania7.6% in 2025Chad3.9% in 202520102020

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.

Chad 05 level0 Mauritania
  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, Chad or Mauritania?

Chad publishes 2.0× as much research as Mauritania in 2022-now (545 against 269 fractional works).

Whose research has more impact, Chad or Mauritania?

6.2% of Mauritania's research reaches the world's top 10% most cited, against 4.2% for Chad.

Is Chad or Mauritania growing faster?

Output in 2022-25 was +104% against 2018-21 for Chad, and +36% for Mauritania.

Which has more open access research, Chad or Mauritania?

79% of Chad's research is free to read, against 55% of Mauritania's.

Which has more world-class institutions, Chad or Mauritania?

Chad holds 0 of the world's top 100 research institutions and Mauritania 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%.

Chad

  1. 1University of N'Djamena3.4% top 10% · 365 works

Mauritania

  1. 1Université de Nouakchott5.9% top 10% · 184 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.

Chad

  1. 1 Andossa Likius #853,994 worldwide 4.6k citations · 80 works
  2. 2 Jean‐Claude Mousseuknadji Kouladoum #1,017,261 worldwide 387 citations · 27 works
  3. 3 Hassane Taïsso Mackaye #1,057,251 worldwide 3.5k citations · 61 works
  4. 4 Yodé Miangotar #1,646,455 worldwide 1.9k citations · 18 works
  5. 5 Hassan Taïsso Mackaye #1,834,244 worldwide 1.1k citations · 22 works

Mauritania

  1. 1 Mohamedhen Vall Nounou #914,374 worldwide 20 citations · 18 works
  2. 2 Boudy Bilal #1,746,841 worldwide 960 citations · 40 works
  3. 3 Hamed Ould Sidi #2,005,584 worldwide 92 citations · 30 works
  4. 4 Ousmane Ly #2,150,804 worldwide 372 citations · 24 works
  5. 5 Mohamed Lemine Cheikh Brahim Ahmed #2,182,622 worldwide 1.8k citations · 32 works