This map shows the geographic impact of Kai Purnhagen'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 Kai Purnhagen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kai Purnhagen more than expected).
This network shows the impact of papers produced by Kai Purnhagen. 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 Kai Purnhagen. The network helps show where Kai Purnhagen may publish in the future.
Co-authorship network of co-authors of Kai Purnhagen
This figure shows the co-authorship network connecting the top 25 collaborators of Kai Purnhagen.
A scholar is included among the top collaborators of Kai Purnhagen 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 Kai Purnhagen. Kai Purnhagen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Purnhagen, Kai, et al.. (2019). Governing Nature Conservation in Political "Hotbeds" : A Contractual Approach. Socio-Environmental Systems Modeling. 25(1). 143–160.1 indexed citations
12.
Purnhagen, Kai & Hanna Schebesta. (2017). A Case Moving at the Frontiers of Market Access, Freedom of Goods, the Common Agricultural Policy and Science in Court - Reflections on Scotch Whisky Association. European Law Review. 42(3). 420–433.3 indexed citations
13.
Schebesta, Hanna & Kai Purnhagen. (2016). The Behaviour of the Average Consumer: A Little Less Normativity and a Little More Reality In CJEU's Case Law? Reflections on Teekanne. ERef Bayreuth (University of Bayreuth).5 indexed citations
14.
Schebesta, Hanna & Kai Purnhagen. (2016). The Behaviour of the Average Consumer: A Little Less Normativity and a Little More Reality in the Court's Case Law? Reflections on Teekanne. European Law Review. 41(4). 590–598.1 indexed citations
15.
Purnhagen, Kai, et al.. (2016). Reversed Harmonization or Horizontalization of EU Standards? : Does WTO Law Facilitate or Constrain the Brussels Effect?. ERef Bayreuth (University of Bayreuth).2 indexed citations
16.
Purnhagen, Kai, et al.. (2016). Reversed Harmonization or Horizontalization of EU Standards?: Does WTO Law Facilitate of Constrain the Brussels Effect?. Socio-Environmental Systems Modeling. 34(1). 92–119.3 indexed citations
17.
Purnhagen, Kai, et al.. (2016). When Life Gives You Lemons: The ‘Battle of Science’ on the Correct Interpretation of Data on Citrus Black Spot Disease between the European Union and South Africa According to the SPS Agreement. Data Archiving and Networked Services (DANS). 8(1). 29–62.1 indexed citations
18.
Purnhagen, Kai & Lucia A. Reisch. (2015). 'Nudging Germany'? Herausforderungen Für Eine Verhaltensbasierte Regulierung in Deutschland. ERef Bayreuth (University of Bayreuth). 630–654.3 indexed citations
Purnhagen, Kai, et al.. (2011). Regulations on E-Commerce Consumer Protection Rules in China and Europe Compared – Same Same but Different?. 2(3). 186–194.1 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.