John C Hagan

163 total papers · 6.7k total citations
48 papers, 3.5k citations indexed

About

John C Hagan is a scholar working on Ophthalmology, Sociology and Political Science and Radiology, Nuclear Medicine and Imaging. According to data from OpenAlex, John C Hagan has authored 48 papers receiving a total of 3.5k indexed citations (citations by other indexed papers that have themselves been cited), including 12 papers in Ophthalmology, 10 papers in Sociology and Political Science and 8 papers in Radiology, Nuclear Medicine and Imaging. Recurrent topics in John C Hagan’s work include Intraocular Surgery and Lenses (8 papers), Crime Patterns and Interventions (6 papers) and Ophthalmology and Visual Impairment Studies (4 papers). John C Hagan is often cited by papers focused on Intraocular Surgery and Lenses (8 papers), Crime Patterns and Interventions (6 papers) and Ophthalmology and Visual Impairment Studies (4 papers). John C Hagan collaborates with scholars based in United States, Canada and Austria. John C Hagan's co-authors include Paul Willis, Bill McCarthy, Holly Foster, Thomas G. Blomberg, Lisa E. Cohen, Brenda Blackwell, Bruce J. Arneklev, Harold G. Grasmick, Faisal Jehan and Manju L. Subramanian and has published in prestigious journals such as Science, JAMA and Journal of Clinical Oncology.

Co-authorship network of co-authors of John C Hagan

This figure shows the co-authorship network connecting the top 25 collaborators of John C Hagan. A scholar is included among the top collaborators of John C Hagan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with John C Hagan. John C Hagan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

John C Hagan

40 papers receiving 2.8k citations

Fields of papers citing papers by John C Hagan

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John C Hagan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by John C Hagan. The network helps show where John C Hagan may publish in the future.

Countries citing papers authored by John C Hagan

Since Specialization
Citations

This map shows the geographic impact of John C Hagan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by John C Hagan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John C Hagan more than expected).

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar’s output or impact.

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2026