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Waltman, Ludo

Waltman, Ludo

Universiteit Leiden, Netherlands

2025 Rank: 11,244

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Social Sciences

SubField 1:

Information & Library Sciences

SubField 2:

Artificial Intelligence & Image Processing

Rank in SubField 1: 7 out of 15,287 Researchers

Data For The Year: 2025
Metrics Self-Citations Excluded All
Rank Based on Composite Score11,24413,009
Total Cites29,02829,642
H-index4849
Hm-index2324
Number of Single Authored Papers88
Total Cites to Single Authored Papers986998
Number of Single+First Authored Papers5656
Total Cites to Single+First Authored Papers6,0186,307
Number of Single+First+Last Authored Papers106106
Total Cites to Single+First+Last Authored Papers22,41922,869
Composite Score44
Number of Distinct Citing Papers22,37422,605
Ratio of Total Citations to Distinct Citing Papers 1.30 1.31
Self-Citation Percentage
2.07%
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Waltman, Ludo

Waltman, Ludo

Universiteit Leiden, Netherlands

2024 Rank: 14,433

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Social Sciences

SubField 1:

Information & Library Sciences

SubField 2:

Artificial Intelligence & Image Processing

Rank in SubField 1: 10 out of 14,509 Researchers

Data For The Year: 2024
Metrics Self-Citations Excluded All
Rank Based on Composite Score14,43316,356
Total Cites21,96622,561
H-index4547
Hm-index2122
Number of Single Authored Papers88
Total Cites to Single Authored Papers844856
Number of Single+First Authored Papers5656
Total Cites to Single+First Authored Papers5,1025,387
Number of Single+First+Last Authored Papers105105
Total Cites to Single+First+Last Authored Papers16,94417,389
Composite Score44
Number of Distinct Citing Papers16,53216,752
Ratio of Total Citations to Distinct Citing Papers 1.33 1.35
Self-Citation Percentage
2.64%
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Waltman, Ludo

Waltman, Ludo

Universiteit Leiden, Netherlands

2023 Rank: 17,675

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Social Sciences

SubField 1:

Information & Library Sciences

SubField 2:

Artificial Intelligence & Image Processing

Rank in SubField 1: 10 out of 13,675 Researchers

Data For The Year: 2023
Metrics Self-Citations Excluded All
Rank Based on Composite Score17,67520,169
Total Cites16,17416,746
H-index4345
Hm-index2121
Number of Single Authored Papers88
Total Cites to Single Authored Papers709721
Number of Single+First Authored Papers5555
Total Cites to Single+First Authored Papers4,3414,622
Number of Single+First+Last Authored Papers100100
Total Cites to Single+First+Last Authored Papers12,53112,964
Composite Score44
Number of Distinct Citing Papers11,83112,040
Ratio of Total Citations to Distinct Citing Papers 1.37 1.39
Self-Citation Percentage
3.42%
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Waltman, Ludo

Waltman, Ludo

Leiden University, Netherlands

2021 Rank: 24,783

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Social Sciences

SubField 1:

Information & Library Sciences

SubField 2:

Artificial Intelligence & Image Processing

Rank in SubField 1: 11 out of 12,251 Researchers

Data For The Year: 2021
Metrics Self-Citations Excluded All
Rank Based on Composite Score24,78328,450
Total Cites9,70610,189
H-index4041
Hm-index1920
Number of Single Authored Papers77
Total Cites to Single Authored Papers504513
Number of Single+First Authored Papers4848
Total Cites to Single+First Authored Papers3,2343,481
Number of Single+First+Last Authored Papers8383
Total Cites to Single+First+Last Authored Papers7,6558,025
Composite Score33
Number of Distinct Citing Papers6,8116,986
Ratio of Total Citations to Distinct Citing Papers 1.43 1.46
Self-Citation Percentage
4.74%
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Waltman, Ludo

Waltman, Ludo

Leiden University, Netherlands

2020 Rank: 36,496

Overall Rank
Rank in SubField 1
Publications
Citations
Main Field:

Social Sciences

SubField 1:

Information & Library Sciences

SubField 2:

Artificial Intelligence & Image Processing

Rank in SubField 1: 26 out of 10,391 Researchers

Data For The Year: 2020
Metrics Self-Citations Excluded All
Rank Based on Composite Score36,49641,186
Total Cites6,0816,520
H-index3637
Hm-index1818
Number of Single Authored Papers77
Total Cites to Single Authored Papers352360
Number of Single+First Authored Papers4747
Total Cites to Single+First Authored Papers2,4202,652
Number of Single+First+Last Authored Papers8181
Total Cites to Single+First+Last Authored Papers4,9005,246
Composite Score33
Number of Distinct Citing Papers4,1534,307
Ratio of Total Citations to Distinct Citing Papers 1.46 1.51
Self-Citation Percentage
6.73%
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