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Ojonugwa Usman

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Economics and Finance 40 2327 2104 8 8 119 4991

Ojonugwa Usman publications per year

The chart shows the history of publications by Ojonugwa Usman between 2015 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ojonugwa Usman published across 11 years, from 2015 to 2025, averaging 11.2 papers a year. Output peaked at 27 publications in 2023. 35 of the 123 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 2015 to 2025. Vertical axis: number of publications, 0 to 27. Peak 27 publications in 2023. 2015: 3 publications 2016: 3 publications 2017: 0 publications 2018: 2 publications 2019: 7 publications 2020: 13 publications 2021: 19 publications 2022: 14 publications 2023: 27 publications 2024: 18 publications 2025: 17 publications
2015 2025

123 publications in total across all disciplines

View publications per year as a table
Ojonugwa Usman: publications per year, 2015 to 2025
Year Publications
2015 3
2016 3
2017 0
2018 2
2019 7
2020 13
2021 19
2022 14
2023 27
2024 18
2025 17
Total 123
Download as CSV

Ojonugwa Usman publication distribution in Economics and Finance in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Economics and Finance in 2026. The highlighted bar marks where Ojonugwa Usman sits on this spectrum.

No. of scientists
25 50 75 100
Bar chart with 97 bars. Horizontal axis: publications, 42–46 to 521+. Vertical axis: number of scientists, 0 to 111. Most scientists, 111, have 137–141 publications. The last bar groups every scientist with 521 publications or more. The highlighted bar, 117–121 publications, is where this scientist sits. 42–46 publications: 1 scientist 47–51 publications: 12 scientists 52–56 publications: 7 scientists 57–61 publications: 23 scientists 62–66 publications: 32 scientists 67–71 publications: 36 scientists 72–76 publications: 56 scientists 77–81 publications: 57 scientists 82–86 publications: 70 scientists 87–91 publications: 86 scientists 92–96 publications: 72 scientists 97–101 publications: 106 scientists 102–106 publications: 97 scientists 107–111 publications: 96 scientists 112–116 publications: 101 scientists 117–121 publications: 103 scientists 122–126 publications: 102 scientists 127–131 publications: 108 scientists 132–136 publications: 107 scientists 137–141 publications: 111 scientists 142–146 publications: 94 scientists 147–151 publications: 96 scientists 152–156 publications: 100 scientists 157–161 publications: 74 scientists 162–166 publications: 68 scientists 167–171 publications: 91 scientists 172–176 publications: 76 scientists 177–181 publications: 75 scientists 182–186 publications: 61 scientists 187–191 publications: 66 scientists 192–196 publications: 68 scientists 197–201 publications: 71 scientists 202–206 publications: 60 scientists 207–211 publications: 56 scientists 212–216 publications: 44 scientists 217–221 publications: 51 scientists 222–226 publications: 65 scientists 227–231 publications: 48 scientists 232–236 publications: 59 scientists 237–241 publications: 37 scientists 242–246 publications: 37 scientists 247–251 publications: 41 scientists 252–256 publications: 43 scientists 257–261 publications: 33 scientists 262–266 publications: 34 scientists 267–271 publications: 39 scientists 272–276 publications: 25 scientists 277–281 publications: 29 scientists 282–286 publications: 29 scientists 287–291 publications: 26 scientists 292–296 publications: 31 scientists 297–301 publications: 31 scientists 302–306 publications: 24 scientists 307–311 publications: 28 scientists 312–316 publications: 24 scientists 317–321 publications: 13 scientists 322–326 publications: 14 scientists 327–331 publications: 25 scientists 332–336 publications: 18 scientists 337–341 publications: 16 scientists 342–346 publications: 18 scientists 347–351 publications: 15 scientists 352–356 publications: 17 scientists 357–361 publications: 19 scientists 362–366 publications: 16 scientists 367–371 publications: 17 scientists 372–376 publications: 7 scientists 377–381 publications: 18 scientists 382–386 publications: 13 scientists 387–391 publications: 19 scientists 392–396 publications: 9 scientists 397–401 publications: 10 scientists 402–406 publications: 13 scientists 407–411 publications: 13 scientists 412–416 publications: 5 scientists 417–421 publications: 10 scientists 422–426 publications: 6 scientists 427–431 publications: 12 scientists 432–436 publications: 9 scientists 437–441 publications: 9 scientists 442–446 publications: 10 scientists 447–451 publications: 12 scientists 452–456 publications: 8 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 4 scientists 472–476 publications: 5 scientists 477–481 publications: 6 scientists 482–486 publications: 7 scientists 487–491 publications: 8 scientists 492–496 publications: 5 scientists 497–501 publications: 4 scientists 502–506 publications: 4 scientists 507–511 publications: 5 scientists 512–516 publications: 7 scientists 517–520 publications: 7 scientists 521+ publications: 99 scientists
42–46 publications 521+

This scientist: 119 publications — 24th percentile

24% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 521 publications or more.

View publications distribution as a table
Number of Economics and Finance scientists by publication count, Research.com 2026 ranking edition. Based on 3,760 ranked scientists.
Publications Scientists This scientist
42–46 1
47–51 12
52–56 7
57–61 23
62–66 32
67–71 36
72–76 56
77–81 57
82–86 70
87–91 86
92–96 72
97–101 106
102–106 97
107–111 96
112–116 101
117–121 103 119
122–126 102
127–131 108
132–136 107
137–141 111
142–146 94
147–151 96
152–156 100
157–161 74
162–166 68
167–171 91
172–176 76
177–181 75
182–186 61
187–191 66
192–196 68
197–201 71
202–206 60
207–211 56
212–216 44
217–221 51
222–226 65
227–231 48
232–236 59
237–241 37
242–246 37
247–251 41
252–256 43
257–261 33
262–266 34
267–271 39
272–276 25
277–281 29
282–286 29
287–291 26
292–296 31
297–301 31
302–306 24
307–311 28
312–316 24
317–321 13
322–326 14
327–331 25
332–336 18
337–341 16
342–346 18
347–351 15
352–356 17
357–361 19
362–366 16
367–371 17
372–376 7
377–381 18
382–386 13
387–391 19
392–396 9
397–401 10
402–406 13
407–411 13
412–416 5
417–421 10
422–426 6
427–431 12
432–436 9
437–441 9
442–446 10
447–451 12
452–456 8
457–461 4
462–466 7
467–471 4
472–476 5
477–481 6
482–486 7
487–491 8
492–496 5
497–501 4
502–506 4
507–511 5
512–516 7
517–520 7
521+ 99
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Ojonugwa Usman D-index placement in Economics and Finance in 2026

The chart shows the D-index (discipline H-index) distribution of Economics and Finance scientists ranked by Research.com in 2026. The highlighted bar marks where Ojonugwa Usman sits on this spectrum.

No. of scientists
50 100 150
Bar chart with 72 bars. Horizontal axis: D-Index, 30 to 101+. Vertical axis: number of scientists, 0 to 178. Most scientists, 178, have 33 D-Index. The last bar groups every scientist with 101 D-Index or more. The highlighted bar, 40 D-Index, is where this scientist sits. 30 D-Index: 126 scientists 31 D-Index: 147 scientists 32 D-Index: 157 scientists 33 D-Index: 178 scientists 34 D-Index: 171 scientists 35 D-Index: 141 scientists 36 D-Index: 132 scientists 37 D-Index: 129 scientists 38 D-Index: 130 scientists 39 D-Index: 120 scientists 40 D-Index: 117 scientists 41 D-Index: 113 scientists 42 D-Index: 114 scientists 43 D-Index: 97 scientists 44 D-Index: 115 scientists 45 D-Index: 86 scientists 46 D-Index: 78 scientists 47 D-Index: 83 scientists 48 D-Index: 62 scientists 49 D-Index: 74 scientists 50 D-Index: 50 scientists 51 D-Index: 66 scientists 52 D-Index: 69 scientists 53 D-Index: 55 scientists 54 D-Index: 67 scientists 55 D-Index: 61 scientists 56 D-Index: 62 scientists 57 D-Index: 45 scientists 58 D-Index: 34 scientists 59 D-Index: 47 scientists 60 D-Index: 46 scientists 61 D-Index: 36 scientists 62 D-Index: 37 scientists 63 D-Index: 56 scientists 64 D-Index: 50 scientists 65 D-Index: 32 scientists 66 D-Index: 28 scientists 67 D-Index: 30 scientists 68 D-Index: 24 scientists 69 D-Index: 25 scientists 70 D-Index: 22 scientists 71 D-Index: 21 scientists 72 D-Index: 26 scientists 73 D-Index: 24 scientists 74 D-Index: 23 scientists 75 D-Index: 12 scientists 76 D-Index: 14 scientists 77 D-Index: 15 scientists 78 D-Index: 15 scientists 79 D-Index: 17 scientists 80 D-Index: 17 scientists 81 D-Index: 11 scientists 82 D-Index: 10 scientists 83 D-Index: 16 scientists 84 D-Index: 11 scientists 85 D-Index: 5 scientists 86 D-Index: 9 scientists 87 D-Index: 13 scientists 88 D-Index: 9 scientists 89 D-Index: 7 scientists 90 D-Index: 6 scientists 91 D-Index: 4 scientists 92 D-Index: 8 scientists 93 D-Index: 10 scientists 94 D-Index: 11 scientists 95 D-Index: 6 scientists 96 D-Index: 4 scientists 97 D-Index: 4 scientists 98 D-Index: 6 scientists 99 D-Index: 6 scientists 100 D-Index: 8 scientists 101+ D-Index: 100 scientists
30 D-Index 101+

This scientist: 40 D-Index — 41st percentile

41% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 101 D-Index or more.

View D-Index distribution as a table
Number of Economics and Finance scientists by D-index, Research.com 2026 ranking edition. Based on 3,760 ranked scientists.
D-Index Scientists This scientist
30 126
31 147
32 157
33 178
34 171
35 141
36 132
37 129
38 130
39 120
40 117 40
41 113
42 114
43 97
44 115
45 86
46 78
47 83
48 62
49 74
50 50
51 66
52 69
53 55
54 67
55 61
56 62
57 45
58 34
59 47
60 46
61 36
62 37
63 56
64 50
65 32
66 28
67 30
68 24
69 25
70 22
71 21
72 26
73 24
74 23
75 12
76 14
77 15
78 15
79 17
80 17
81 11
82 10
83 16
84 11
85 5
86 9
87 13
88 9
89 7
90 6
91 4
92 8
93 10
94 11
95 6
96 4
97 4
98 6
99 6
100 8
101+ 100
Download as CSV

Best Publications

  • Testing the role of oil production in the environmental Kuznets curve of oil producing countries: New insights from Method of Moments Quantile Regression

    George N. Ike;Ojonugwa Usman;Samuel Asumadu Sarkodie

  • Revisiting the environmental Kuznets curve (EKC) hypothesis in India: the effects of energy consumption and democracy.

    Ojonugwa Usman;Paul Terhemba Iorember;Ifedolapo O Olanipekun

  • Assessment of the role of renewable energy consumption and trade policy on environmental degradation using innovation accounting: Evidence from the US

    Ojonugwa Usman;Andrew Adewale Alola;Samuel Asumadu Sarkodie

  • Globalization, energy use, and environmental degradation in South Africa: Startling empirical evidence from the Maki-cointegration test.

    Abdulkadir Abdulrashid Rafindadi;Ojonugwa Usman

  • Role of renewable energy and globalization on ecological footprint in the USA: implications for environmental sustainability

    Ojonugwa Usman;Seyi Saint Akadiri;Ibrahim Adeshola

  • Environmental quality effects of income, energy prices and trade: The role of renewable energy consumption in G-7 countries.

    George N. Ike;Ojonugwa Usman;Andrew Adewale Alola;Samuel Asumadu Sarkodie

  • Role of Non-Renewable Energy Efficiency and Renewable Energy in Driving Environmental Sustainability in India: Evidence from the Load Capacity Factor Hypothesis

    Unknown

  • Effects of tourism, financial development, and renewable energy on environmental performance in EU-28: does institutional quality matter?

    Muhammad Sani Musa;Gylych Jelilov;Paul Terhemba Iorember;Ojonugwa Usman

  • Effects of domestic material consumption, renewable energy, and greenhouse gas emissions on environmental sustainability in the EU-28: Evidence from GMM panel-VAR

    Ojonugwa Usman;Andrew Adewale Alola;Andrew Adewale Alola;Seyi Saint Akadiri

  • Modelling environmental degradation in South Africa: the effects of energy consumption, democracy, and globalization using innovation accounting tests.

    Ojonugwa Usman;Ifedolapo O. Olanipekun;Paul Terhemba Iorember;Maryam Abu-Goodman

  • Energy mix outlook and the EKC hypothesis in BRICS countries: a perspective of economic freedom vs. economic growth

    Seyi Saint Akadırı;Andrew Adewale Alola;Ojonugwa Usman

  • Fiscal policy and CO2 emissions from heterogeneous fuel sources in Thailand: Evidence from multiple structural breaks cointegration test.

    George N. Ike;Ojonugwa Usman;Samuel Asumadu Sarkodie

  • The influence of renewable energy use, human capital, and trade on environmental quality in South Africa: multiple structural breaks cointegration approach

    Paul Terhemba Iorember;Gylych Jelilov;Ojonugwa Usman;Abdurrahman Işık

  • Assessing the impact of resource efficiency, renewable energy R&D spending, and green technologies on environmental sustainability in Germany: Evidence from a Wavelet Quantile-on-Quantile Regression

    Unknown

  • Operational behaviours of multinational corporations, renewable energy transition, and environmental sustainability in Africa: Does the level of natural resource rents matter?

    Unknown

  • Towards mitigating ecological degradation in G-7 countries: accounting for economic effect dynamics, renewable energy consumption, and innovation

    Unknown

  • Domestic material consumption and greenhouse gas emissions in the EU‐28 countries: Implications for environmental sustainability targets

    Andrew Adewale Alola;Seyi Saint Akadiri;Ojonugwa Usman

  • Impact assessment of trade on environmental performance: accounting for the role of government integrity and economic development in 79 countries

    Abdulkareem Alhassan;Ojonugwa Usman;George N. Ike;Samuel Asumadu Sarkodie

  • Toward sustainable electricity consumption in Brazil: the role of economic growth, globalization and ecological footprint using a nonlinear ARDL approach

    Abdulkadir Abdulrashid Rafindadi;Ojonugwa Usman

  • Environmental performance and tourism development in EU-28 Countries: the role of institutional quality

    Ojonugwa Usman;Osama Elsalih;Osama Koshadh

Frequent Co-Authors

Andrew Adewale Alola
Andrew Adewale Alola Inland Norway University of Applied Sciences
Mehmet Balcilar
Mehmet Balcilar University of New Haven
Samuel Asumadu Sarkodie
Samuel Asumadu Sarkodie Nord University
Mark E. Wohar
Mark E. Wohar University of Nebraska at Omaha
Seyi Saint Akadiri
Seyi Saint Akadiri Central Bank of Nigeria
David Roubaud
David Roubaud Montpellier Business School
Festus Victor Bekun
Festus Victor Bekun Gelişim Üniversitesi

External Links

Personal website of Ojonugwa Usman Google Scholar page

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Best Scientists Citing Ojonugwa Usman

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Publications: 25

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Solomon Prince Nathaniel

Pan-Atlantic University

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Muntasir Murshed

Muntasir Murshed

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Muhammad Shahbaz

Muhammad Shahbaz

Beijing Institute of Technology

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Seyi Saint Akadiri

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Publications: 8

Dervis Kirikkaleli

Dervis Kirikkaleli

Lebanese American University

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Husam Rjoub

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Arshian Sharif

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Asif Razzaq

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Muhammad Khalid Anser

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