This map shows the geographic impact of Jan Nießen'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 Jan Nießen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Jan Nießen more than expected).
This network shows the impact of papers produced by Jan Nießen. 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 Jan Nießen. The network helps show where Jan Nießen may publish in the future.
Co-authorship network of co-authors of Jan Nießen
This figure shows the co-authorship network connecting the top 25 collaborators of Jan Nießen.
A scholar is included among the top collaborators of Jan Nießen 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 Jan Nießen. Jan Nießen is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Rückert‐John, Jana, et al.. (2010). Verstetigung des Angebots von Öko-Lebensmitteln in der Außer-Haus-Verpflegung: Analyse von Gründen für den Ausstieg und Ableitung präventiver Maßnahmen. Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture).1 indexed citations
3.
Nießen, Jan & Ulrich Hamm. (2008). Identifying the gap between stated and actual buying behaviour on organic products based on consumer panel data. Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture). 346–349.16 indexed citations
4.
Huddleston, Thomas, Jan Nießen, Dirk Jacobs, Andrew Geddes, & L. Citron. (2007). Index des Politiques d'Intégration des Migrants. Social Science Open Access Repository (GESIS – Leibniz Institute for the Social Sciences). 25.3 indexed citations
5.
Nießen, Jan & Ulrich Hamm. (2007). Diskrepanz zwischen Verbraucheraussagen und tatsächlichem Kaufverhalten bei Öko-Produkten in der Direktvermarktung. Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture).1 indexed citations
6.
Nießen, Jan, et al.. (2006). Civic citizenship and immigrant inclusion. A guide for the implementation of civic citizenship policies.. SHILAP Revista de lepidopterología.
7.
Carrera, Sergio, et al.. (2006). The Nexus between Immigration, Integration and Citizenship in the EU. Radboud Repository (Radboud University).9 indexed citations
8.
Nießen, Jan, et al.. (2002). Immigrant and Minority Businesses: Making the Policy Case. SSRN Electronic Journal.1 indexed citations
9.
Nießen, Jan, et al.. (2002). Combating racial and ethnic discrimination : taking the European legislative agenda further.4 indexed citations
10.
Nießen, Jan, et al.. (2002). . European Journal of Migration and Law. 4(3). 329–337.1 indexed citations
11.
Nießen, Jan. (2001). . European Journal of Migration and Law. 3(1). 73–89.1 indexed citations
12.
Nießen, Jan. (2001). . European Journal of Migration and Law. 3(3/4). 419–434.1 indexed citations
13.
Guild, Elspeth & Jan Nießen. (1996). The Developing Immigration and Asylum Policies of the European Union:Adopted Conventions, Resolutions, Recommendations, Decisions and Conclusions.10 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.