Citation Rankings (Highly Cited Researchers) 2024 and list of influential and most cited researchers in Agriculture and Forestry, Art, Design and Architecture, Business and Management, Economics and Econometrics, Education, Engineering and Technology, History, Philosophy, Theology, Law, Medicine and Health Sciences, Natural Sciences and Social Sciences and their 256 sub-branches is a unique service offered only by “AD Scientific Index”. You can see the most cited and influential researchers in the country and region. See also for more specific citation analyses: "last 6 years citation index" Universities Rankings 2024 (Sort by: Total Citations) and Universities Rankings 2024 (Sort by : Last 6 Years Citations)
* Total Citation Counts Rankings
World Rank
7,312
Country Rank
3,481
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/2834.png)
![United States](/flags/us.png)
![Colin A Chapman](https://cdn.adscientificindex.com/pictures/be/1358892.jpg)
Primatology
Conservation Biology
Behavioural Ecology
Restoration
Seed Dispersal
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,537
26,218
0.440
* Total Citation Counts Rankings
World Rank
7,743
Country Rank
3,704
Institution Rank : 1
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Vernon L Smith](/user/assets/images/profile/no-profile-photo.png)
Experimental Econiomics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,378
10,824
0.189
* Total Citation Counts Rankings
World Rank
8,244
Country Rank
312
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/1840.jpg)
![Canada](/flags/ca.png)
![Scott Chapman](https://cdn.adscientificindex.com/pictures/7a/641147.jpg)
Galaxy Evolution
Cosmology
Instrumentation in Astronomy
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
55,223
20,487
0.371
* Total Citation Counts Rankings
World Rank
14,222
Country Rank
6,773
Institution Rank : 2
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Yakir Aharonov](/user/assets/images/profile/no-profile-photo.png)
Quantum Physics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,314
10,357
0.263
* Total Citation Counts Rankings
World Rank
21,146
Country Rank
9,833
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Hillard Kaplan](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,509
11,777
0.386
* Total Citation Counts Rankings
World Rank
24,107
Country Rank
999
Institution Rank : 149
![](https://cdn.adscientificindex.com/logos/11508.jpg)
![Canada](/flags/ca.png)
![Chapman Kr](https://cdn.adscientificindex.com/pictures/cd/641204.jpg)
Respiratory Medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,083
9,432
0.336
* Total Citation Counts Rankings
World Rank
26,702
Country Rank
2,324
Institution Rank : 25
![](https://cdn.adscientificindex.com/logos/10967.png)
![United Kingdom](/flags/gb.png)
![Tracey Chapman](/user/assets/images/profile/no-profile-photo.png)
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,217
11,235
0.429
* Total Citation Counts Rankings
World Rank
28,461
Country Rank
1,259
Institution Rank : 107
![](https://cdn.adscientificindex.com/logos/11312.png)
![Australia](/flags/au.png)
![Scott Chapman](/user/assets/images/profile/no-profile-photo.png)
crop physiology
crop modelling
quantitative genetics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,118
12,015
0.478
* Total Citation Counts Rankings
World Rank
29,419
Country Rank
13,455
Institution Rank : 156
![](https://cdn.adscientificindex.com/logos/11571.jpg)
![United States](/flags/us.png)
![Edwin Chapman](https://cdn.adscientificindex.com/pictures/03/1878549.jpg)
membrane fusion
synaptic transmission
neuronal cell biology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,580
6,395
0.260
* Total Citation Counts Rankings
World Rank
30,997
Country Rank
14,137
Institution Rank : 54
![](https://cdn.adscientificindex.com/logos/8551.png)
![United States](/flags/us.png)
![Karena W Chapman](https://cdn.adscientificindex.com/pictures/1e/1671993.jpg)
Pair Distribution Function (PDF) analysis
in-situ synchrotron methods
high pressure
batteries
catalysis
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,718
14,452
0.609
* Total Citation Counts Rankings
World Rank
33,267
Country Rank
15,045
Institution Rank : 148
![](https://cdn.adscientificindex.com/logos/11862.jpg)
![United States](/flags/us.png)
![William C Chapman](/user/assets/images/profile/no-profile-photo.png)
general surgery
transplant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,562
9,072
0.402
* Total Citation Counts Rankings
World Rank
40,143
Country Rank
17,871
Institution Rank : 4
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Andrew Lyon](https://cdn.adscientificindex.com/pictures/d1/880670.jpg)
hydrogels
microgels
regenerative medicine
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,750
5,019
0.254
* Total Citation Counts Rankings
World Rank
41,101
Country Rank
1,836
Institution Rank : 156
![](https://cdn.adscientificindex.com/logos/11421.jpg)
![Australia](/flags/au.png)
![Simon Chapman](https://cdn.adscientificindex.com/pictures/76/1318.jpg)
tobacco control
news media
public health
advocacy
modern health panics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,423
4,574
0.235
* Total Citation Counts Rankings
World Rank
41,191
Country Rank
18,281
Institution Rank : 5
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Tara Gruenewald](https://cdn.adscientificindex.com/pictures/98/880671.jpg)
Health psychology
social psychology
gerontology
public health
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,396
7,446
0.384
* Total Citation Counts Rankings
World Rank
43,398
Country Rank
19,148
Institution Rank : 169
![](https://cdn.adscientificindex.com/logos/1228.jpg)
![United States](/flags/us.png)
![Gretchen Chapman](https://cdn.adscientificindex.com/pictures/a0/894859.jpg)
decision making
health behavior
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,634
8,413
0.451
* Total Citation Counts Rankings
World Rank
47,588
Country Rank
2,071
Institution Rank : 188
![](https://cdn.adscientificindex.com/logos/5598.png)
![Canada](/flags/ca.png)
![Lauren Chapman](/user/assets/images/profile/no-profile-photo.png)
ecophysiology
evolutionary ecology
aquatic ecology
environmental stressors
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,427
4,781
0.274
* Total Citation Counts Rankings
World Rank
47,955
Country Rank
20,919
Institution Rank : 81
![](https://cdn.adscientificindex.com/logos/7295.jpg)
![United States](/flags/us.png)
![Walter G Chapman](https://cdn.adscientificindex.com/pictures/82/1482152.jpg)
associating fluids
polymers
phase behavior
interfacial phenomena
confined systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,329
6,067
0.350
* Total Citation Counts Rankings
World Rank
52,009
Country Rank
22,511
Institution Rank : 6
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Laura M Glynn](https://cdn.adscientificindex.com/pictures/8b/880672.jpg)
Maternal-Child Health
Pregnancy
Maternal Brain
Stress and Birth Outcomes
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,317
7,489
0.459
* Total Citation Counts Rankings
World Rank
55,610
Country Rank
23,901
Institution Rank : 224
![](https://cdn.adscientificindex.com/logos/11078.jpg)
![United States](/flags/us.png)
![Patrick L Chapman](https://cdn.adscientificindex.com/pictures/95/1615707.jpg)
power electronics
solar power
electric drives
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,524
4,581
0.295
* Total Citation Counts Rankings
World Rank
57,260
Country Rank
233
Institution Rank : 47
![](https://cdn.adscientificindex.com/logos/11270.jpg)
![New Zealand](/flags/nz.png)
![Philippa Howden Chapman](https://cdn.adscientificindex.com/pictures/fd/1683.jpg)
Public health
housing
climate change
energy
inequalities
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,179
7,119
0.469
* Total Citation Counts Rankings
World Rank
57,307
Country Rank
24,557
Institution Rank : 3
![](https://cdn.adscientificindex.com/logos/7577.png)
![United States](/flags/us.png)
![Robert Chapman Wood](https://cdn.adscientificindex.com/pictures/37/1647079.jpg)
Neuroscience of motivation in large groups (like organizations)
Management of large
innovative complex product systems
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,169
4,109
0.271
* Total Citation Counts Rankings
World Rank
58,655
Country Rank
25,061
Institution Rank : 7
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Michael Ibba](https://cdn.adscientificindex.com/pictures/db/881995.jpg)
Microbiology
Biochemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,909
4,463
0.299
* Total Citation Counts Rankings
World Rank
59,050
Country Rank
25,227
Institution Rank : 8
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![Ramesh P Singh](https://cdn.adscientificindex.com/pictures/4a/880673.jpg)
Aerosol
remote sensing
geoscience
geotomography
oil slicks
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,835
7,635
0.515
* Total Citation Counts Rankings
World Rank
65,177
Country Rank
27,518
Institution Rank : 9
![](https://cdn.adscientificindex.com/logos/1457.jpg)
![United States](/flags/us.png)
![John R Horner](https://cdn.adscientificindex.com/pictures/2c/893213.jpg)
Paleontology
Developmental Biology
Histology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,753
4,367
0.318
* Total Citation Counts Rankings
World Rank
66,882
Country Rank
5,706
Institution Rank : 185
![](https://cdn.adscientificindex.com/logos/10980.png)
![United Kingdom](/flags/gb.png)
![Karen Chapman](https://cdn.adscientificindex.com/pictures/07/1334951.jpg)
Glucocorticoids
steroid metabolism
glucocorticoid receptor
inflammation
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,486
4,129
0.306
Colin A Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
59,537
26,218
0.440
Primatology
Conservation Biology
Behavioural Ecology
Restoration
Seed Dispersal
Vernon L Smith
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
57,378
10,824
0.189
Scott Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
55,223
20,487
0.371
Galaxy Evolution
Cosmology
Instrumentation in Astronomy
Yakir Aharonov
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
39,314
10,357
0.263
Hillard Kaplan
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
30,509
11,777
0.386
Chapman Kr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
28,083
9,432
0.336
Tracey Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
26,217
11,235
0.429
Scott Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
25,118
12,015
0.478
crop physiology
crop modelling
quantitative genetics
Edwin Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
24,580
6,395
0.260
membrane fusion
synaptic transmission
neuronal cell biology
Karena W Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,718
14,452
0.609
Pair Distribution Function (PDF) analysis
in-situ synchrotron methods
high pressure
batteries
catalysis
William C Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,562
9,072
0.402
general surgery
transplant
Andrew Lyon
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,750
5,019
0.254
Simon Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,423
4,574
0.235
tobacco control
news media
public health
advocacy
modern health panics
Tara Gruenewald
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
19,396
7,446
0.384
Health psychology
social psychology
gerontology
public health
Gretchen Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,634
8,413
0.451
Lauren Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,427
4,781
0.274
ecophysiology
evolutionary ecology
aquatic ecology
environmental stressors
Walter G Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
17,329
6,067
0.350
associating fluids
polymers
phase behavior
interfacial phenomena
confined systems
Laura M Glynn
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
16,317
7,489
0.459
Maternal-Child Health
Pregnancy
Maternal Brain
Stress and Birth Outcomes
Patrick L Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,524
4,581
0.295
power electronics
solar power
electric drives
Philippa Howden Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,179
7,119
0.469
Public health
housing
climate change
energy
inequalities
Robert Chapman Wood
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
15,169
4,109
0.271
Neuroscience of motivation in large groups (like organizations)
Management of large
innovative complex product systems
Michael Ibba
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,909
4,463
0.299
Ramesh P Singh
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,835
7,635
0.515
Aerosol
remote sensing
geoscience
geotomography
oil slicks
John R Horner
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,753
4,367
0.318
Paleontology
Developmental Biology
Histology
Karen Chapman
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
13,486
4,129
0.306
Glucocorticoids
steroid metabolism
glucocorticoid receptor
inflammation