Total 2,403,032 scientists, country 221, and institutions 24,466 are evaluated in the Productivity Rankings, an exclusive service provided by AD Scientific Index. This ranking measures and highlights the scientific productivity of researchers based on the i10 index (number of publications with at least 10 citations). This system identifies highly productive scientists across disciplines, institutions, and regions, contributing to the development of evidence-based academic policies and effective incentive mechanisms. The rankings include global, regional, and institutional analyses, along with specialized rankings such as Scientists' Last 6 Years' i10 Index and Universities' i10 Index Rankings 2025. With Premium Membership, you can:
- Gain full access to detailed comparisons and advanced analytics,
- Objectively evaluate your academic productivity,
- Make strategic, data-driven decisions to enhance performance.
* Total i10 IndexRankings
Ranking Based On Selection: 1
![Richard Mbithi Mulwa](https://cdn.adscientificindex.com/pictures/6e/89449.jpg)
Environmental Economics
Environmental Valuation
Efficiency and Productivity Analysis
Economic
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
26
0.765
* Total i10 IndexRankings
Ranking Based On Selection: 2
![Wilfred Nyangena](/user/assets/images/profile/no-profile-photo.png)
Resource and Environmental Economics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
11
0.550
* Total i10 IndexRankings
Ranking Based On Selection: 3
![Joshua Cheboiwo](/user/assets/images/profile/no-profile-photo.png)
forestry
environmental economics
tree products trade
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
12
9
0.750
* Total i10 IndexRankings
Ranking Based On Selection: 4
![Stephen Wambua](/user/assets/images/profile/no-profile-photo.png)
Development economics
Natural resource and Environmental economics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
9
4
0.444
* Total i10 IndexRankings
Ranking Based On Selection: 5
![Ezekiel Ndunda](https://cdn.adscientificindex.com/pictures/ff/5830409.jpg)
Environmental and Natural Resource Economics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
7
5
0.714
* Total i10 IndexRankings
Ranking Based On Selection: 6
![Javier G. Montoya-Zumaeta](https://cdn.adscientificindex.com/pictures/8e/4724608.jpg)
Environmental economics
Ecological economics
Development economics
Environmental Policy
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 7
![Isaac Keror](https://cdn.adscientificindex.com/pictures/1c/4752591.jpg)
Environmental Economics. Contingent Valuation Model
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
* Total i10 IndexRankings
Ranking Based On Selection: 8
![Felista W. Muriu](/user/assets/images/profile/no-profile-photo.png)
Environmental Impact Assessment
Gender issues in resources management
Environmental Economics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
* Total i10 IndexRankings
Ranking Based On Selection: 9
![Edward L Kateiya](/user/assets/images/profile/no-profile-photo.png)
Land Resource Management
Agricultural Economics
Environmental Economics
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Richard Mbithi Mulwa
University of Nairobi
Nairobi, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
34
26
0.765
Environmental Economics
Environmental Valuation
Efficiency and Productivity Analysis
Economic
Wilfred Nyangena
University of Nairobi
Nairobi, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
20
11
0.550
Resource and Environmental Economics
Joshua Cheboiwo
Kenya Forestry Research Institute
Nairobi, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
12
9
0.750
forestry
environmental economics
tree products trade
Stephen Wambua
South Eastern Kenya University
Kitui County, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
9
4
0.444
Development economics
Natural resource and Environmental economics
Ezekiel Ndunda
Kenyatta University
Nairobi, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
7
5
0.714
Environmental and Natural Resource Economics
Javier G. Montoya-Zumaeta
World Agroforestry (ICRAF)
Nairobi, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
6
6
1.000
Environmental economics
Ecological economics
Development economics
Environmental Policy
Isaac Keror
University of Eldoret
Eldoret, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
2
1
0.500
Environmental Economics. Contingent Valuation Model
Felista W. Muriu
South Eastern Kenya University
Kitui County, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
1
1
1.000
Environmental Impact Assessment
Gender issues in resources management
Environmental Economics
Edward L Kateiya
Masai Mara University
Narok, Kenya
i-10 Metrics
Total
Last 6 Years
Last 6 Years / Total
0
0
0
Land Resource Management
Agricultural Economics
Environmental Economics