Staff

The many faces of GESIS

Vita

2016, Dr. rer. soc., sociology, University Duisburg-Essen, advisor P. Stein;
2007, M.A., sociology, Columbia University, USA, advisor H. C. White;
2002, Dipl.-Ing. (FH), media technology, Mittweida University, advisor L. Hilmer.

Service

Open Methodology: Editing an "Introduction to Computational Social Science methods with Python" (self-explanatory teaching materials);
Capacity Building: Coordinating GESIS activities (page) and teaching Social Network Science (interview).

Research

Networks: Social formations are dualities of connectivity and culture (presentation);
Complexity: Social formations adapt to uncertainty at the edge of chaos;
Computation: Social formations leave traces as digital behavioral data.

Publications

Journal article

Volle, Jonas, Andreas Schmitz, Haiko Lietz, and Richard Münch. 2024. "Group formation in science between homogenization and differentiation: Modeling the development of U.S. and German sociology." International Journal of Sociology 54 (4): 221-241. doi: https://doi.org/10.1080/00207659.2024.2357908.

Lietz, Haiko, Mohsen Jadidi, Daniel Kostic, Milena Tsvetkova, and Claudia Wagner. 2024. "Individual and gender inequality in computer science: A career study of cohorts from 1970 to 2000." Quantitative Science Studies 5 (1): 128–152. doi: https://doi.org/10.1162/qss_a_00283.

Lietz, Haiko, Andreas Schmitz, and Johann Schaible. 2021. "Analyse sozialer Netzwerke mit digitalen Verhaltensdaten." easy_social_sciences 66 90-98. doi: https://doi.org/10.15464/easy.2021.010.

Lietz, Haiko, Andreas Schmitz, and Johann Schaible. 2021. "Social network analysis with digital behavioral data." easy_social_sciences 66 41-48. doi: https://doi.org/10.15464/easy.2021.005.

Lietz, Haiko. 2020. "Drawing impossible boundaries: Field delineation of Social Network Science." Scientometrics 125 2841–2876. doi: https://doi.org/10.1007/s11192-020-03527-0.

Stier, Sebastian, Arnim Bleier, Haiko Lietz, and Markus Strohmaier. 2018. "Election Campaigning on Social Media: Politicians, Audiences and the Mediation of Political Communication on Facebook and Twitter." Political Communication 35 (1): 50-74. doi: https://doi.org/10.1080/10584609.2017.1334728.

Jadidi, Mohsen, Fariba Karimi, Haiko Lietz, and Claudia Wagner. 2018. "Gender disparities in science? Dropout, productivity, collaborations and success of male and female computer scientists." Advances in Complex Systems 21 (3-4): 1750011. doi: https://doi.org/10.1142/S0219525917500114.

Lietz, Haiko, and Ronald Rousseau. 2013. "A mathematical relationship between growth and scaling in an exponentially growing bibliographic system." ISSI Newsletter 9 (4): 74-76. http://www.haikolietz.de/docs/mathematicalrelationship.pdf.

Lietz, Haiko. 2008. "Comment on Harrison C. White’s/2." Sociologica (2). doi: https://doi.org/10.2383/27727.

Chapter in an edited book

Jadidi, Mohsen, Haiko Lietz, Mattia Samory, and Claudia Wagner. 2022. "The Hipster Paradox in Electronic Dance Music: How musicians trade mainstream success off against alternative status." In Proceedings of the Sixteenth International AAAI Conference on Web and Social Media, edited by Ceren Budak, Meeyoung Cha, and Daniele Quercia, 16, 370-380. Association for the Advancement of Artificial Intelligence. doi: https://doi.org/10.1609/icwsm.v16i1.19299.

Lietz, Haiko. 2019. "Rezension von Padgett, John F./Powell, Walter W. (2012): The Emergence of Organizations and Markets. Princeton, NJ: Princeton University Press." In Schlüsselwerke der Netzwerkforschung, edited by Boris Holzer, and Christian Stegbauer, 449-452. Wiesbaden: Springer VS. doi: https://doi.org/10.1007/978-3-658-21742-6_105.

Lietz, Haiko. 2019. "Rezension von Watts, Duncan J./Strogatz, Steven H. (1998). Collective Dynamics of 'Small-World' Networks. Nature 393, S. 440-442." In Schlüsselwerke der Netzwerkforschung, edited by Boris Holzer, and Christian Stegbauer, 551-553. Wiesbaden: Springer VS. doi: https://doi.org/10.1007/978-3-658-21742-6_130.

Lietz, Haiko, Claudia Wagner, Arnim Bleier, and Markus Strohmaier. 2014. "When politicians talk: Assessing online conversational practices of political parties on Twitter." In Proceedings of the International AAAI Conference on Web and Social Media, 8, 285-294. https://ojs.aaai.org/index.php/ICWSM/article/view/14521.

Riechert, Mathias, Daniel Sirtes, and Haiko Lietz. 2013. "Collaboration benefits and international visibility of two-country-collaborations." In Translational Twists and Turns: Science As A Socio-Economic Endeavor - Proceedings of the 18th International Conference on Science and Technology Indicators (STI 2013), edited by Sybille Hinze, and André Lottmann, 302-312. Berlin: iFQ. http://www.haikolietz.de/docs/collaborationbenefits.pdf.

Lietz, Haiko. 2013. "Diagnose von Emerging Science: Die Fälle "New Science of Networks" und Szientometrie." In Wissen - Wissenschaft - Organisation, edited by Heinz-Peter Ohly, Fortschritte der Wissensorganisation 12, 357-371. Würzburg: Ergon. http://www.haikolietz.de/docs/emergingscience.pdf.

Lietz, Haiko, and Mathias Riechert. 2013. "Science Dynamics: Normalized Growth Curves, Sharpe Ratios, and Scaling Exponents." In Proceedings of the 14th International Society of Scientometrics and Informetrics Conference (ISSI 2013), Vol. II, edited by Juan Gorraiz, Edgar Schiebel, Christian Gumpenberger, Marianne Hörlesberger, and Henk Moed, 1566-1577. Wien: Facultas. http://www.haikolietz.de/docs/sciencedynamics.pdf.

Monograph

Lietz, Haiko. 2016. Scale-Free Identity: The Emergence of Social Network Science. Dissertation, University of Duisburg Essen, Faculty of Social Sciences. doi: https://doi.org/10.17185/duepublico/81733.

Lietz, Haiko. 2008. White, Harrison C. 2008. Identity and Control: How Social Formations Emerge. 2. Contributions to chapters 2 and 7. Princeton, NJ: Princeton University Press. http://press.princeton.edu/titles/8672.html.

Working and discussion paper

Lietz, Haiko. 2007. Mit neuen Methoden zu neuen Aussagen: Semantische Netzwerkanalyse am Beispiel der Europäischen Verfassung. http://www.haikolietz.de/docs/verfassung.pdf.

Data/Software

Lietz, Haiko. 2023. Computer Science (1970-2014). doi: https://doi.org/10.7802/2642.

Lietz, Haiko, and N. Gizem Bacaksizlar Turbic. 2023. Introduction to Computational Social Science methods with Python. https://github.com/gesiscss/css_methods_python.

Lietz, Haiko. 2020. compsoc – Notebooks for Computational Sociology. https://github.com/gesiscss/compsoc.

Jadidi, Mohsen, Fariba Karimi, Claudia Wagner, and Haiko Lietz. 2017. Collaborations of computer scientists between 1970 and 2016. doi: https://doi.org/10.7802/1520.

Lietz, Haiko. 2017. Social Network Science (1916-2012). doi: https://doi.org/10.7802/1437.

Presentation at a conference

Lietz, Haiko. 2024. "Kritikalität und Selbstähnlichkeit in der relationalen Soziologie Whites." 9. Kongress der Deutschen Gesellschaft für Netzwerkforschung, Schader Stiftung, Darmstadt, 2024-10-29.

Lietz, Haiko. 2024. "Practical computational analytical sociology." 16th Annual Conference of the International Network of Analytical Sociology, Leipzig University, Leipzig, 2024-05-30.

Lietz, Haiko, Mathieu Génois, Johann Schaible, Maria Zens, and Marcos Oliveira. 2023. "Community formation at IC2S2 2017." International Conference on Computational Social Science (IC²S² 2023), Copenhagen, 2023-07-18.

Lietz, Haiko. 2022. "Identifying endogenous time to slice longitudinal network data." XLII Sunbelt International Social Network Conference, Cairns, Australia, 2022-08-30.

Lietz, Haiko, and Marcos Oliveira. 2021. "Blockmodeling as an order-creating downward causation mechanism." Tagung der Sektion Soziologische Netzwerkforschung der Deutschen Gesellschaft für Soziologie, Bergische Universität Wuppertal, Wuppertal, 2021-03-18.

Lietz, Haiko, and Marcos Oliveira. 2021. "Blockmodeling as an order-creating downward causation mechanism." Networks 2021: A Joint Sunbelt and NetSci Conference, Online, 2021-07-07.

Jadidi, Mohsen, Haiko Lietz, and Claudia Wagner. 2021. "Erfolg im Feld der elektronischen Tanzmusik: Ein Netzwerkansatz." 6. Kongress der Deutschen Gesellschaft für Netzwerkforschung, Universität Bayreuth, Bayreuth, 2021-09-06.

Lietz, Haiko, Andreas Schmitz, and Johann Schaible. 2021. "Netzwerkforschung mit digitalen Verhaltensdaten." 6. Kongress der Deutschen Gesellschaft für Netzwerkforschung, Universität Bayreuth, Bayreuth, 2021-09-06.

Lietz, Haiko, and Johann Schaible. 2020. "Analyzing Structure and Content With Digital Behavioral Data: Introducing the compsoc Framework." Content Meets Structure: Integrating Different Perspectives on Social Networks, Heidelberger Akademie der Wissenschaften, Heidelberg, 2020-09-28.

Lietz, Haiko, Sebastian Leuoth, and Klaus Liepelt. 2020. "Von Regentropfen zur Wettervorhersage: Anwendungen einer Systemtheorie komplexer Netzwerke." Warum Netzwerkforschung? Tagung der Deutschen Gesellschaft für Netzwerkforschung, Schader Stiftung, Darmstadt, 2020-03-04.

Lietz, Haiko, Marcos Oliveira, and Florian Lemmerich. 2019. "Emergence of order at scientific conferences." 4th European Conference on Social Networks, Eidgenössische Technische Hochschule Zürich, Zürich, 2019-09-11.

Lietz, Haiko. 2019. "Field delineation of Social Network Science." Indo-German Workshop on Information Retrieval, Informetrics & Scientometrics, GESIS - Leibniz-Institut für Sozialwissenschaften, Köln, 2019-06-12.

Lietz, Haiko. 2019. "Modeling culture as a complex adaptive network." Dynamics of Interdependent Decisions, Hanse-Wissenschaftskolleg - Institute for Advanced Study, Delmenhorst, 2019-06-25.

Lietz, Haiko. 2019. "Scale-free networks are important." 12th Annual INAS Conference, Higher School of Economics, St. Petersburg, 2019-06-02.

Wagner, Claudia, Daniel Kostic, Haiko Lietz, and Mohsen Jadidi. 2019. "The predictability of success and dropouts in computer science." NetSci 2019, University of Vermont, Burlington, VT, 2019-05-29.

Lietz, Haiko. 2018. "Kulturelle Bedeutungsstrukturen in Netzwerken." Kultur, Stadt und Netzwerke, Tagung der Deutschen Gesellschaft für Netzwerkforschung, Schader Stiftung, Darmstadt, 2018-01-18.

Liepelt, Klaus, Sebastian Leuoth, and Haiko Lietz. 2018. "White applied: Relationale Unterwegsforschung mit sehr kleinen Informationsbausteinen." Das Paradigma der Relationalität, Tagung der Deutschen Gesellschaft für Netzwerkforschung, Schader Stiftung, Darmstadt, 2018-12-03.

Lietz, Haiko, Julian Kohne, and Claudia Wagner. 2018. "Zur Rolle der Netzwerkforschung in der Computational Social Science." Tagung der Sektion Soziologische Netzwerkforschung der Deutschen Gesellschaft für Soziologie, Oldenburg, 2018-03-01.

Jadidi, Mohsen, Fariba Karimi, Haiko Lietz, and Claudia Wagner. 2017. "Gender disparities in science? Dropout, productivity, collaborations and success of male and female computer scientists." 1st European Symposium on Societal Challenges in Computational Social Science, London, 2017-11-17.

Stier, Sebastian, Arnim Bleier, Haiko Lietz, and Markus Strohmaier. 2017. "Platform effects on social media: Topic salience in a representative survey, Facebook and Twitter during an election campaign." International Conference on Computational Social Science (IC²S² 2017), Cologne, 2017-07-13.

Kaczmirek, Lars, Philipp Mayr, Ravi Vatrapu, Arnim Bleier, Manuela S. Blumenberg, Tobias Gummer, Kjeld Hansen, Abid Hussein, Zeshan Ali Jaffari, Katharina E. Kinder-Kurlanda, Haiko Lietz, Markus Strohmaier, Claudia Wagner, Katrin Weller, Christof Wolf, and Chris James Zimmerman. 2014. "PEP-TF: Social media monitoring of the campaigns for the 2013 German Bundestag elections on Facebook and Twitter." Social Media Communication Workshop, Mannheim, 2014-03-28.

Lietz, Haiko, and Andreas Strotmann. 2013. "A network based delineation of the social network research field." XXXIII Sunbelt International Social Network Conference, Hamburg.

Lietz, Haiko. 2013. "On relational sociology." International Conference on Network Science (NetSci 2013), Copenhagen.

Lietz, Haiko, and Mathias Riechert. 2013. "Science dynamics: Normalized growth curves, sharpe ratios, and scaling exponents." 14th International Society of Scientometrics and Informetrics Conference (ISSI 2013), Vienna.

Lietz, Haiko. 2012. "Science as a punctuated equilibrium." International Conference on Network Science (NetSci 2012), Northwestern University, Evanston, IL.

Lietz, Haiko, Mathias Riechert, and Daniel Sirtes. 2012. "Using scaling exponents for citation analysis." The 17th Nordic Workshop on Bibliometrics and Research Policy, University of Helsinki, 2012-10-12.

Lietz, Haiko. 2010. "Beitrag der Relationalen Soziologie zur Szientometrie: Ein Werkstattbericht." Netzwerke erfassen, analysieren und verstehen: Zur Integration von Daten, Methoden und Theorien, Tagung der Sektion Soziologische Netzwerkforschung der Deutschen Gesellschaft für Soziologie, Berlin.

Lietz, Haiko. 2010. "Diagnosing emerging science: The cases 'New Science of Networks' and scientometrics." 3rd ENID Conference on STI Indicators for Policy Making and Strategic Decision, Paris. http://www.haikolietz.de/docs/densification.pdf.

Lietz, Haiko. 2009. "Diagnose von Emerging Science: Die Fälle 'New Science of Networks' und Szientometrie." Wissen – Wissenschaft – Organisation, 12. Tagung der Deutschen ISKO, Bonn.

Lietz, Haiko. 2008. "Komplexe soziale Systeme, Emergenz und Selbstähnlichkeit: Zum neuen Paradigma der Komplexitätstheorie." Netzwerkanalyse und Netzwerktheorie: Ein neues Paradigma in den Sozialwissenschaften, Konferenz der Sektion Soziologische Netzwerkanalyse, Frankfurt. https://nbn-resolving.org/urn:nbn:de:0168-ssoar-62887-7.

Lietz, Haiko. 2008. "Self-similarity of complex social networks: A sociological perspective." 5th Conference on Applications of Social Network Analysis (ASNA 2008), Zürich.

Lietz, Haiko. 2008. "Zur Selbstähnlichkeit komplexer sozialer Netzwerke." 19. Internationale Wissenschaftliche Konferenz Mittweida (IWKM 2008), Mittweida.

Lietz, Haiko. 2007. "The fractal polity: Why Schröder failed at the second term." International Workshop and Conference on Network Science (NetSci 2007), Queens, NY.

Liepelt, Klaus, and Haiko Lietz. 2006. "Before and after the exchange of ruling elites: Informal political networks in Germany's parliament." XXVI Sunbelt International Social Network Conference, Vancouver, BC.

Liepelt, Klaus, and Haiko Lietz. 2006. "Informelle Netzwerke in deutschen Parlamenten und ihre Bedeutung." Tagung der Sektion Modellbildung und Simulation der Deutschen Gesellschaft für Soziologie, Köln.

Lietz, Haiko. 2006. "Social Network Analysis im journalistischen Einsatz." 1. Fachtagung Computer Assisted Reporting, Hamburg.

Presentation not at a conference

Lietz, Haiko, N. Gizem Bacaksizlar Turbic, Arnim Bleier, and Nicolò Gozzi. 2023. "Introduction to Computational Social Science methods with Python." Social ComQuant workshop series at Koç University, Istanbul, 2023-04-11 - 2023-04-12. https://socialcomquant.ku.edu.tr/intro-to-css-methods-with-python/.

Lietz, Haiko. 2021. "Social network analysis with digital behavioral data." Meet the Experts: GESIS online talks on Social Science Methods and Research Data, Online, 2021-11-25. https://youtu.be/FniNS0yZ24E.

Seminar

Assenmacher, Dennis, and Haiko Lietz. 2024. "Master Project in Computational Social Systems." RWTH Aachen University, Aachen. Sommersemester 2024: 2 SWS.

Tutorial

Lietz, Haiko, Lisette Espín Noboa, and Olga Zagovora. 2020. "Introduction to Social Network Science with Python." GESIS Methods Seminar, Köln.

Karimi, Fariba, Haiko Lietz, and Marcos Oliveira. 2019. "Big Data Module II: Introduction to Social Network Science with Python." GESIS Methods Seminar, Köln.

Lietz, Haiko, and Marcos Oliveira. 2019. "Introduction to Python’s graph-tool." Workshop at 4th European Conference on Social Networks, Eidgenössische Technische Hochschule Zürich, Zürich.

Bleier, Arnim, Fabian Flöck, Florian Lemmerich, and Haiko Lietz. 2018. "Big Data Module I: Introduction to Data Science with Python." GESIS Methods Seminar, Köln.

Flöck, Fabian, Christoph Kling, Florian Lemmerich, and Haiko Lietz. 2017. "Big Data Module I: Introduction to Data Science with Python." GESIS Methods Seminar, Köln.

Event

Ellwardt, Lea, Markus Gamper, and Haiko Lietz. 2019. "2. Kölner Netzwerktagung." Tagung der Sektion Soziologische Netzwerkforschung der Deutschen Gesellschaft für Soziologie, Köln, 2019-02-14 - 2019-02-15.

Karimi, Fariba, and Haiko Lietz. 2015. "Application of Network Theory in Computational Social Science." 2nd GESIS Computational Social Science Winter Symposium, 2015-12-01.

Ellwardt, Lea, Markus Gamper, Haiko Lietz, and Holger Spieckermann. 2015. "Kölner Netzwerktagung." Tagung der Sektion Soziologische Netzwerkforschung der Deutschen Gesellschaft für Soziologie, Köln, 2015-10-05 - 2015-10-06.