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Saudi Arabia vs Yemen

On research quality in 2022-now, Saudi Arabia ranks #31 in the world and Yemen #105, of 189 countries. Saudi Arabia stands higher in 25 of the 25 fields both publish in, Yemen in 0.

Research profiles alike: 0.64similar shapes of research, whatever their size. How it is measured

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Saudi Arabia

World rank, 2022-now
#31
#29 all time
Works, 2022-now
156k
fractional
Top-10% rate
14.4%
share of its work among the world's most cited
Open access
57%
of its works free to read

Strongest relative focus: General Dentistry, Orthodontics, Modeling and Simulation.

Yemen

World rank, 2022-now
#105
#122 all time
Works, 2022-now
7.2k
fractional
Top-10% rate
8.7%
share of its work among the world's most cited
Open access
69%
of its works free to read

Strongest relative focus: Drug Discovery, General Dentistry, Numerical Analysis.

Who leads, measure by measure?

Saudi Arabia leads on 5 of 9 measures: research quality, citation excellence for its fields, output, top-10% rate and citations per work. Yemen leads on 3 of 9 measures: open access, international co-authorship and growth. The two are level on institutions in the world top 100.

Saudi Arabia 51 level3 Yemen
  1. #31Research qualityworld rank of 189 countries, 2022-now#105
  2. 1.18×Citation excellence for its fieldsits top-10% rate against what its topics predict; 1.00× is as expected0.77×
  3. 156kOutputfractional works, 2022-now7.2k
  4. 14.4%Top-10% rateshare of its works among the world's most cited8.7%
  5. 16.5Citations per workall time, per fractional work8.7
  6. 0World top 100institutions it holds among the world's best 1000
  7. 57%Open accessof its works free to read, all time69%
  8. 43%Internationalof its works written with co-authors abroad, all time54%
  9. +72%Growthworks in 2022-25 against 2018-21; half a bar is no change+91%

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?

Saudi Arabia stands higher in 25 of 25 fields, Yemen in 0. Saudi Arabia leads most in Environmental Science (#30 against #118). Each bar is that side's standing among all countries ranked in the field: the full bar is first place.

Saudi Arabia 250 Yemen
  1. #31Agricultural and Biological Sciences#114
  2. #47Arts and Humanities#94
  3. #32Biochemistry, Genetics and Molecular Biology#81
  4. #28Business, Management and Accounting#83
  5. #18Chemical Engineering-
  6. #15Chemistry-
  7. #26Computer Science#84
  8. #28Decision Sciences-
  9. #24Dentistry-
  10. #24Earth and Planetary Sciences-
  11. #39Economics, Econometrics and Finance-
  12. #20Energy-
  13. #24Engineering#86
  14. #30Environmental Science#118
  15. #30Health Professions#88
  16. #39Immunology and Microbiology-
  17. #20Materials Science#65
  18. #27Mathematics#56
  19. #43Medicine#130
  20. #35Neuroscience-
  21. #30Nursing-
  22. #22Pharmacology, Toxicology and Pharmaceutics-
  23. #39Physics and Astronomy-
  24. #34Psychology-
  25. #52Social Sciences#131

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 Saudi Arabia rankYemen rank Saudi Arabia top 10%Yemen top 10% Saudi Arabia worksYemen works
Agricultural and Biological Sciences #31 #114 18.3% 7.4% 5.9k 291
Arts and Humanities #47 #94 14.1% 10.4% 2.2k 203
Biochemistry, Genetics and Molecular Biology #32 #81 11.6% 7.9% 7.4k 215
Business, Management and Accounting #28 #83 20.2% 12.4% 4k 320
Chemical Engineering #18 - 13.7% - 947 -
Chemistry #15 - 16.4% - 4.5k -
Computer Science #26 #84 19.3% 11.7% 14k 755
Decision Sciences #28 - 17.4% - 1.8k -
Dentistry #24 - 11.6% - 3.4k -
Earth and Planetary Sciences #24 - 15.3% - 1.4k -
Economics, Econometrics and Finance #39 - 15.7% - 2.3k -
Energy #20 - 13.0% - 3k -
Engineering #24 #86 16.2% 9.2% 26k 889
Environmental Science #30 #118 16.5% 7.5% 6k 276
Health Professions #30 #88 15.0% 8.4% 4.2k 244
Immunology and Microbiology #39 - 10.4% - 1.4k -
Materials Science #20 #65 14.6% 15.4% 9.8k 278
Mathematics #27 #56 16.6% 10.1% 4.7k 231
Medicine #43 #130 9.4% 5.7% 33k 1.4k
Neuroscience #35 - 13.4% - 2k -
Nursing #30 - 13.1% - 995 -
Pharmacology, Toxicology and Pharmaceutics #22 - 15.2% - 1.2k -
Physics and Astronomy #39 - 14.3% - 2.6k -
Psychology #34 - 13.4% - 4.1k -
Social Sciences #52 #131 15.4% 8.0% 8.4k 859

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.

Saudi Arabia

▲ 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. Machine Learning9,377▲ 1.57×97 topics
  2. Epidemiology8,606▲ 1.20×140 topics
  3. Deep Learning8,212▲ 1.33×85 topics
  4. Nanomaterials4,903▲ 2.6×21 topics
  5. Inflammation4,358◆ 1.14×83 topics
  6. Nanoparticles4,169▲ 1.85×44 topics
  7. Renewable Energy3,548▲ 1.37×61 topics
  8. Healthcare3,546▲ 1.73×38 topics
  9. Oxidative Stress3,515▲ 1.19×63 topics
  10. Quality of Life3,402▲ 1.31×58 topics
  11. Environmental Impact3,365◆ 1.10×72 topics
  12. Heat Transfer3,190▲ 3.6×20 topics
  13. Biomedical Applications3,145▲ 1.48×36 topics
  14. COVID-192,875▲ 1.23×33 topics
  15. Graphene2,614▲ 2.2×12 topics
  16. Nanocomposites2,530▲ 1.79×22 topics
  17. Supply Chain Management2,398▲ 1.49×26 topics
  18. Antioxidant2,358▲ 1.92×51 topics
  19. Synthesis1,863▲ 2.8×37 topics
  20. Toxicity1,816▲ 2.3×20 topics
  21. Nanostructures1,774▲ 2.4×17 topics
  22. IoT Security1,724▲ 3.1×3 topics
  23. Smart Cities1,649▲ 3.5×8 topics
  24. Water Splitting1,646▲ 2.5×4 topics
  25. Experimental Investigation1,634▲ 8.8×5 topics
  26. Nonlinear Equations1,616▲ 7.0×6 topics
  27. Applications1,601▲ 3.3×8 topics
  28. Solar Energy1,585▲ 2.8×5 topics
  29. Antimicrobial1,475▲ 2.9×14 topics
  30. Green Synthesis1,351▲ 4.0×5 topics
  31. Thermal Conductivity1,290▲ 4.5×8 topics
  32. Nanofluids1,272▲ 8.6×2 topics
  33. Review1,231▲ 5.7×5 topics
  34. Viscosity1,059▲ 8.3×4 topics
  35. Convective Transport1,015▲ 12×1 topic
  36. Enhancement1,015▲ 12×1 topic
  37. Fractional Calculus1,005▲ 9.9×2 topics
  38. Anomalous Diffusion942▲ 9.4×2 topics
  39. Homotopy Analysis Method910▲ 11×1 topic
  40. Random Walk910▲ 11×1 topic

Yemen

▲ 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. Machine Learning448▲ 1.61×94 topics
  2. Epidemiology430▲ 1.30×134 topics
  3. Deep Learning344▲ 1.19×84 topics
  4. Healthcare203▲ 2.1×31 topics
  5. Artificial Intelligence196▲ 1.65×57 topics
  6. Globalization192▲ 1.17×100 topics
  7. Supply Chain Management188▲ 2.5×23 topics
  8. Education169▲ 1.18×102 topics
  9. Ethnicity125▲ 4.0×15 topics
  10. Digital Transformation124▲ 2.8×26 topics
  11. Literature121▲ 2.6×27 topics
  12. Culture120▲ 2.8×21 topics
  13. History114▲ 1.97×25 topics
  14. Knowledge Management108▲ 2.3×30 topics
  15. Legal Regulation106▲ 5.7×8 topics
  16. Philosophy104▲ 2.8×22 topics
  17. Social Influence103▲ 5.8×3 topics
  18. Economic Security99▲ 5.6×7 topics
  19. Science99▲ 4.8×7 topics
  20. Islam98▲ 5.7×4 topics
  21. Customer Satisfaction98▲ 3.7×9 topics
  22. IoT97▲ 3.1×17 topics
  23. Smart Cities97▲ 4.4×8 topics
  24. Malay Language96▲ 8.2×1 topic
  25. Sharia Law96▲ 8.1×1 topic
  26. Corpus Linguistics85▲ 4.8×5 topics
  27. Foresight84▲ 7.7×2 topics
  28. Organizational Performance82▲ 3.8×11 topics
  29. Unmanned Aerial Vehicles81▲ 5.2×5 topics
  30. Strategic Planning80▲ 6.5×5 topics
  31. Design80▲ 5.8×6 topics
  32. Public Oversight79▲ 7.7×1 topic
  33. Transport Policy79▲ 7.7×1 topic
  34. Modernization78▲ 5.1×3 topics
  35. Air Force78▲ 7.9×1 topic
  36. Warfare78▲ 7.9×1 topic
  37. Nonlinear Equations76▲ 7.1×6 topics
  38. Social Media Marketing62▲ 15×1 topic
  39. Fractional Calculus58▲ 12×2 topics
  40. Cross-Cultural Communication57▲ 7.6×3 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?

Saudi Arabia has out-published Yemen every year since 1980.

still counting20k40k60kSaudi Arabia45k in 2025Yemen2,139 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 counting0.50%1.0%Saudi Arabia0.76% in 2025Yemen0.036% 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 counting10%20%Saudi Arabia15.0% in 2025Yemen8.6% 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.

Saudi Arabia 32 level0 Yemen
  1. 0In the world top 500
  2. 0In the top 1000
  3. 1In the top 5000
  4. 2In the top 1,0000
  5. #34Elite 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, Saudi Arabia or Yemen?

Saudi Arabia publishes 21.6× as much research as Yemen in 2022-now (156k against 7.2k fractional works).

Whose research has more impact, Saudi Arabia or Yemen?

14.4% of Saudi Arabia's research reaches the world's top 10% most cited, against 8.7% for Yemen.

Is Saudi Arabia or Yemen growing faster?

Output in 2022-25 was +91% against 2018-21 for Yemen, and +72% for Saudi Arabia.

Which has more open access research, Saudi Arabia or Yemen?

69% of Yemen's research is free to read, against 57% of Saudi Arabia's.

Which has more world-class institutions, Saudi Arabia or Yemen?

Saudi Arabia holds 0 of the world's top 100 research institutions and Yemen 0; in the top 1,000 it is 2 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%.

Saudi Arabia

  1. 1King Abdullah University of Science and Technology17.4% top 10% · 5.7k works
  2. 2King Abdulaziz University13.8% top 10% · 11k works
  3. 3University of Business and Technology22.6% top 10% · 2k works
  4. 4King Saud University14.1% top 10% · 20k works
  5. 5Ministry of Education19.1% top 10% · 655 works
  6. 6King Fahd University of Petroleum and Minerals16.9% top 10% · 7.2k works

Yemen

  1. 1University of Science and Technology5.0% top 10% · 2.1k works
  2. 2Sana'a University7.9% top 10% · 1.7k works
  3. 3Ibb University15.3% top 10% · 445 works
  4. 4Taiz University11.9% top 10% · 445 works
  5. 5Thamar University12.1% top 10% · 474 works
  6. 6University of Aden6.6% top 10% · 551 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.

Saudi Arabia

  1. 1 Xuping Sun #352 worldwide 82k citations · 678 works
  2. 2 Arunodaya Raj Mishra #507 worldwide 9.8k citations · 215 works
  3. 3 Osman M. Bakr #703 worldwide 62k citations · 539 works
  4. 4 Mohamed Eddaoudi #1,507 worldwide 97k citations · 772 works
  5. 5 Pratibha Rani #1,724 worldwide 8.6k citations · 204 works

Yemen

  1. 1 Hamood Mohammed Al‐Hattami #33,148 worldwide 1.4k citations · 60 works
  2. 2 Abdulwahab Rajeh #54,107 worldwide 5.9k citations · 92 works
  3. 3 Mohammed A. Al‐Hakimi #61,642 worldwide 1.2k citations · 42 works
  4. 4 Saeed Rabea Baatwah #166,289 worldwide 933 citations · 51 works
  5. 5 Saeed Hamood Alsamhi #167,907 worldwide 7.2k citations · 201 works

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