Ralf D. Sommerfeld

2.0k total citations · 1 hit paper
11 papers, 1.4k citations indexed

About

Ralf D. Sommerfeld is a scholar working on Sociology and Political Science, Safety Research and Experimental and Cognitive Psychology. According to data from OpenAlex, Ralf D. Sommerfeld has authored 11 papers receiving a total of 1.4k indexed citations (citations by other indexed papers that have themselves been cited), including 6 papers in Sociology and Political Science, 6 papers in Safety Research and 4 papers in Experimental and Cognitive Psychology. Recurrent topics in Ralf D. Sommerfeld's work include Experimental Behavioral Economics Studies (6 papers), Evolutionary Game Theory and Cooperation (6 papers) and Evolutionary Psychology and Human Behavior (4 papers). Ralf D. Sommerfeld is often cited by papers focused on Experimental Behavioral Economics Studies (6 papers), Evolutionary Game Theory and Cooperation (6 papers) and Evolutionary Psychology and Human Behavior (4 papers). Ralf D. Sommerfeld collaborates with scholars based in Germany, United States and Austria. Ralf D. Sommerfeld's co-authors include Manfred Milinski, Hans-Jürgen Krambeck, Dirk Semmann, Jochem Marotzke, Floyd A. Reed, Arne Traulsen, Martin Kalbe, Christophe Eizaguirre, Tobias L. Lenz and Thorsten B. H. Reusch and has published in prestigious journals such as Proceedings of the National Academy of Sciences, Nature Communications and PLoS ONE.

In The Last Decade

Ralf D. Sommerfeld

11 papers receiving 1.4k citations

Hit Papers

The collective-risk socia... 2008 2026 2014 2020 2008 100 200 300 400
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. The collective-risk social dilemma and the prevention of simulated dangerous climate change
    2008 432 citations Manfred Milinski, Ralf D. Sommerfeld et al. Proceedings of the National Academy of Sciences profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ralf D. Sommerfeld Germany 10 955 557 374 298 167 11 1.4k
Mayuko Nakamaru Japan 18 970 1.0× 391 0.7× 549 1.5× 239 0.8× 137 0.8× 37 1.2k
Matthijs van Veelen Netherlands 19 807 0.8× 410 0.7× 393 1.1× 186 0.6× 107 0.6× 41 979
Maxwell N. Burton-Chellew United Kingdom 20 706 0.7× 480 0.9× 253 0.7× 244 0.8× 239 1.4× 33 1.3k
Hans-Jürgen Krambeck Germany 14 2.4k 2.5× 1.5k 2.6× 612 1.6× 751 2.5× 131 0.8× 25 3.2k
Erol Akçay United States 24 852 0.9× 219 0.4× 655 1.8× 227 0.8× 879 5.3× 64 2.1k
Jung-Kyoo Choi South Korea 8 873 0.9× 446 0.8× 100 0.3× 248 0.8× 62 0.4× 13 1.2k
Moshe Hoffman United States 14 744 0.8× 573 1.0× 114 0.3× 282 0.9× 86 0.5× 22 1.3k
Jeffrey Fletcher United States 14 599 0.6× 168 0.3× 390 1.0× 118 0.4× 180 1.1× 36 915
Gregory B. Pollock United States 14 663 0.7× 229 0.4× 741 2.0× 185 0.6× 638 3.8× 26 1.2k
Laurel Fogarty United States 16 925 1.0× 113 0.2× 261 0.7× 168 0.6× 293 1.8× 28 1.6k

Countries citing papers authored by Ralf D. Sommerfeld

Since Specialization
Citations

This map shows the geographic impact of Ralf D. Sommerfeld'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 Ralf D. Sommerfeld with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ralf D. Sommerfeld more than expected).

Fields of papers citing papers by Ralf D. Sommerfeld

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ralf D. Sommerfeld. 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 Ralf D. Sommerfeld. The network helps show where Ralf D. Sommerfeld may publish in the future.

Co-authorship network of co-authors of Ralf D. Sommerfeld

This figure shows the co-authorship network connecting the top 25 collaborators of Ralf D. Sommerfeld. A scholar is included among the top collaborators of Ralf D. Sommerfeld 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 Ralf D. Sommerfeld. Ralf D. Sommerfeld is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

11 of 11 papers shown
1.
Milinski, Manfred, Christian Hilbe, Dirk Semmann, Ralf D. Sommerfeld, & Jochem Marotzke. (2016). Humans choose representatives who enforce cooperation in social dilemmas through extortion. Nature Communications. 7(1). 10915–10915. 47 indexed citations
2.
Fehl, Katrin, Ralf D. Sommerfeld, Dirk Semmann, Hans-Jürgen Krambeck, & Manfred Milinski. (2012). I Dare You to Punish Me—Vendettas in Games of Cooperation. PLoS ONE. 7(9). e45093–e45093. 22 indexed citations
3.
Traulsen, Arne, Dirk Semmann, Ralf D. Sommerfeld, Hans-Jürgen Krambeck, & Manfred Milinski. (2010). Human strategy updating in evolutionary games. Proceedings of the National Academy of Sciences. 107(7). 2962–2966. 313 indexed citations
4.
Eizaguirre, Christophe, Tobias L. Lenz, Ralf D. Sommerfeld, et al.. (2010). Parasite diversity, patterns of MHC II variation and olfactory based mate choice in diverging three-spined stickleback ecotypes. Evolutionary Ecology. 25(3). 605–622. 108 indexed citations
5.
Kalbe, Martin, et al.. (2009). Lifetime reproductive success is maximized with optimal MHC diversity. Helmholtz-Zentrum für Polar-und Meeresforschung (Alfred-Wegener-Institut). 7 indexed citations
6.
Kalbe, Martin, Christophe Eizaguirre, Thorsten B. H. Reusch, et al.. (2008). Lifetime reproductive success is maximized with optimal major histocompatibility complex diversity. Proceedings of the Royal Society B Biological Sciences. 276(1658). 925–934. 121 indexed citations
7.
Sommerfeld, Ralf D., Thomas Boehm, & Manfred Milinski. (2008). Desynchronising male and female reproductive seasonality: dynamics of male MHC-independent olfactory attractiveness in sticklebacks. Ethology Ecology & Evolution. 20(4). 325–336. 10 indexed citations
8.
Milinski, Manfred, Ralf D. Sommerfeld, Hans-Jürgen Krambeck, Floyd A. Reed, & Jochem Marotzke. (2008). The collective-risk social dilemma and the prevention of simulated dangerous climate change. Proceedings of the National Academy of Sciences. 105(7). 2291–2294. 432 indexed citations breakdown →
9.
Sommerfeld, Ralf D., Hans-Jürgen Krambeck, & Manfred Milinski. (2008). Multiple gossip statements and their effect on reputation and trustworthiness. Proceedings of the Royal Society B Biological Sciences. 275(1650). 2529–2536. 107 indexed citations
10.
Sommerfeld, Ralf D., Hans-Jürgen Krambeck, Dirk Semmann, & Manfred Milinski. (2007). Gossip as an alternative for direct observation in games of indirect reciprocity. Proceedings of the National Academy of Sciences. 104(44). 17435–17440. 268 indexed citations
11.
Sommerfeld, Ralf D., Martin R. Bauert, Edna Hillmann, & Markus Stauffacher. (2005). Feeding enrichment by self‐operated food boxes for white‐fronted lemurs (Eulemur fulvus albifrons) in the Masoala exhibit of the Zurich Zoo. Zoo Biology. 25(2). 145–154. 11 indexed citations

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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