Per Ahlgren

Publication Activity (10 Years)

Years Active: 1999-2024
Publications (10 Years): 24

Top Topics

Negatively Affect

Top Venues

J. Informetrics

Publications

Peter Sjögårde, Per Ahlgren
Normalization of direct citations for clustering in publication-level networks: evaluation of six approaches. Scientometrics 129 (3) (2024)
Peter Sjögårde, Per Ahlgren
Seed-based information retrieval in networks of research publications: Evaluation of direct citations, bibliographic coupling, co-citations and PubMed related article score. CoRR (2024)
Peter Sjögårde, Per Ahlgren
Normalization of direct citations in publication-level networks: Evaluation of six approaches. CoRR (2023)
Peter Sjögårde, Per Ahlgren, Ludo Waltman
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches. J. Assoc. Inf. Sci. Technol. 72 (7) (2021)
Jie-lan Ding, Zhesi Shen, Per Ahlgren, Tobias Jeppsson, David Minguillo, Johan Lyhagen
The link between ethnic diversity and scientific impact: the mediating effect of novelty and audience diversity. Scientometrics 126 (9) (2021)
Peter Sjögårde, Per Ahlgren
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of specialties. Quant. Sci. Stud. 1 (1) (2020)
Peter Sjögårde, Per Ahlgren, Ludo Waltman
Algorithmic labeling in hierarchical classifications of publications: Evaluation of bibliographic fields and term weighting approaches. CoRR (2020)
Johan Lyhagen, Per Ahlgren
Uncertainty and the ranking of economics journals. Scientometrics 125 (3) (2020)
Per Ahlgren, Yunwei Chen, Cristian Colliander, Nees Jan van Eck
Enhancing direct citations: A comparison of relatedness measures for community detection in a large set of PubMed publications. Quant. Sci. Stud. 1 (2) (2020)
Peter Sjögårde, Per Ahlgren
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of specialties. CoRR (2019)
Cristian Colliander, Per Ahlgren
Comparison of publication-level approaches to ex-post citation normalization. Scientometrics 120 (1) (2019)
Jie-lan Ding, Zhesi Shen, Per Ahlgren, Tobias Jeppsson, David Minguillo
How does author ethnic diversity affect scientific impact? A study of nanoscience and nanotechnology. ISSI (2019)
Per Ahlgren, Yunwei Chen, Cristian Colliander, Nees Jan van Eck
Community Detection Using Citation Relations and Textual Similarities in a Large Set of PubMed Publications. ISSI (2019)
Peter Sjögårde, Per Ahlgren
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics. CoRR (2018)
Per Ahlgren, Cristian Colliander, Peter Sjögårde
Exploring the relation between referencing practices and citation impact: A large-scale study based on Web of Science data. J. Assoc. Inf. Sci. Technol. 69 (5) (2018)
Ting Yue, Liying Yang, Per Ahlgren, Jie-lan Ding, Shuangqing Shi, Rainer Frietsch
A comparison of citation disciplinary structure in science between the G7 countries and the BRICS countries. J. Data Inf. Sci. 3 (3) (2018)
Peter Sjögårde, Per Ahlgren
Granularity of algorithmically constructed publication-level classifications of research publications: Identification of topics. J. Informetrics 12 (1) (2018)
Jie-lan Ding, Per Ahlgren, Liying Yang, Ting Yue
Disciplinary structures in Nature, Science and PNAS: journal and country levels. Scientometrics 116 (3) (2018)
Jie-lan Ding, Per Ahlgren, Liying Yang, Ting Yue
Document Type Profiles in Nature, Science, and PNAS: Journal and Country Level. J. Data Inf. Sci. 1 (3) (2017)
Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding
Reply to 'Comment on "Using multi-level frontiers in DEA models to grade countries/territories" by G.-l. Yang et al. [Journal of Informetrics 10(1) (2016), 238-253]'. J. Informetrics 11 (3) (2017)
Sichao Tong, Per Ahlgren
Evolution of three Nobel Prize themes and a Nobel snub theme in chemistry: a bibliometric study with focus on international collaboration. Scientometrics 112 (1) (2017)
Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding
Using multi-level frontiers in DEA models to grade countries/territories. J. Informetrics 10 (1) (2016)
Per Ahlgren, Peter Pagin, Olle Persson, Maria Svedberg
Bibliometric analysis of two subdomains in philosophy: free will and sorites. Scientometrics 103 (1) (2015)
Guoliang Yang, Per Ahlgren, Liying Yang, Ronald Rousseau, Jie-lan Ding
Grading Countries/Territories Using DEA Frontiers. ISSI (2015)
Per Ahlgren, Ludo Waltman
The correlation between citation-based and expert-based assessments of publication channels: SNIP and SJR vs. Norwegian quality assessments. J. Informetrics 8 (4) (2014)
Per Ahlgren, Olle Persson, Robert J. W. Tijssen
Geographical distance in bibliometric relations within epistemic communities. Scientometrics 95 (2) (2013)
Cristian Colliander, Per Ahlgren
Experimental comparison of first and second-order similarities in a scientometric context. Scientometrics 90 (2) (2012)
Per Ahlgren, Cristian Colliander, Olle Persson
Field normalized citation rates, field normalized journal impact and Norwegian weights for allocation of university research funds. Scientometrics 92 (3) (2012)
Cristian Colliander, Per Ahlgren
The effects and their stability of field normalization baseline on relative performance with respect to citation impact: A case study of 20 natural science departments. J. Informetrics 5 (1) (2011)
Per Ahlgren, Kalervo Järvelin
Measuring impact of twelve information scientists using the DCI index. J. Assoc. Inf. Sci. Technol. 61 (7) (2010)
Per Ahlgren, Cristian Colliander
Document-document similarity approaches and science mapping: Experimental comparison of five approaches. J. Informetrics 3 (1) (2009)
Per Ahlgren, Leif Grönqvist
Evaluation of retrieval effectiveness with incomplete relevance data: Theoretical and experimental comparison of three measures. Inf. Process. Manag. 44 (1) (2008)
Per Ahlgren, Bo Jarneving
Bibliographic coupling, common abstract stems and clustering: A comparison of two document-document similarity approaches in the context of science mapping. Scientometrics 76 (2) (2008)
Per Ahlgren, Jaana Kekäläinen
Indexing strategies for Swedish full text retrieval under different user scenarios. Inf. Process. Manag. 43 (1) (2007)
Per Ahlgren, Jaana Kekäläinen
Swedish full text retrieval: Effectiveness of different combinations of indexing strategies with query terms. Inf. Retr. 9 (6) (2006)
Per Ahlgren, Leif Grönqvist
Retrieval evaluation with incomplete relevance data: a comparative study of three measures. CIKM (2006)
Per Ahlgren, Bo Jarneving, Ronald Rousseau
Author cocitation analysis and Pearson's r. J. Assoc. Inf. Sci. Technol. 55 (9) (2004)
Per Ahlgren, Bo Jarneving, Ronald Rousseau
Rejoinder: In defense of formal methods. J. Assoc. Inf. Sci. Technol. 55 (10) (2004)
Per Ahlgren, Bo Jarneving, Ronald Rousseau
Requirements for a cocitation similarity measure, with special reference to Pearson's correlation coefficient. J. Assoc. Inf. Sci. Technol. 54 (6) (2003)
Per Ahlgren
On a Cognitive Search Strategy. CoLIS (1999)