Do Birds of a Feather Flock Together?

Do Birds of a Feather Flock Together?
Do Birds of a Feather Flock Together? An Empirical Study of Czech Journalists on Twitter Josef Šlerka, Petr Koubský
Case studies How do Czech journalists follow each other? What is more important: being same (homophily) or being close (propinquity)? Who is recognized as an Twitter influencer by Czech journalists?   Are there common opinion leaders?  If yes, who are they?
Datasets The list of 446 journalists created by crowdsourcing (partially prepared by Lenka Krsova) Data downloaded by R Retweet tool Downloaded in April 2018
Basic summary
Top by followers Jaromír Bosák MartinVeselovský Robert Záruba Jindrich Sidlo Miloš Čermák Erik Tabery Václav Moravec Alexandr Mitrofanov Filip Horký Erik Best 0 75000 150000 225000 300000
Top publishers Český rozhlas Economia Česká televize Mafra ex-Mafra Seznam Zprávy 0 27,5 55 82,5 110 316 accounts of total 446 belong to one of publishers listed above
How do they follow each other
Methods For clustering, we used Vincent D. Blondel algorithm Vincent D Blondel, Jean-Loup Guillaume, Renaud Lambiotte, Etienne Lefebvre, Fast unfolding of communities in large networks, in Journal of Statistical Mechanics: Theory and Experiment 2008 We used ForceAtlas for visualization. ForceAtlas: A Continuous Graph Layout Algorithm for Handy Network Visualization https://medialab.sciencespo.fr/publications/ Jacomy_Heymann_Venturini-Force_Atlas2.pdf
Top accounts of journalists The percentage of other journalists watching them MartinVeselovský Jindřich Šídlo Erik Tabery Filip Horký Alexandr Mitrofanov Robert Casensky Filip Rožánek Michal Kubal Miloš Čermák František Lutonský 0 20 40 60 80
Czech public broadcasting 83% of listed here are Czech Radio employees and co-workers. There are also people who worked for/in the Czech public broadcasting for a long time in the past
Sports journalists and others 68% of listed are sports journalist and editors There are also people who have worked as sports journalists in the past
Czech TV & others 75% are Czech TV employees There are also freelancers who worked for Czech TV
Economia & others 57% are journalists and editors of Economia publishing house High share of former Economia workers and editors of economic titles
MAFRA, ex-MAFRA & others About 40% are the current and former editors of MAFRA publishing house.
Conclusion For journalists, the professional role of the propinquity played a major role in their network. Interest (homophily) in specific topics has led to a stronger link among sports journalists.
Who are influencers for Czech journalists
Methods We have prepared a list of users followed by 30 and more percent of journalists: 137 users
Segmentation 9 % 6 % 18 % 23 % 44 % Czech journalists, editors etc. Czech and foreign media Czech and foreign politicians state institutions and civil servants others
1. Martin Veselovský (80%) 2. Jindřich Šídlo (80%) 3. Erik Tabery (68%) 4. Andrej Babiš (65%) 5. Filip Horký (64%) 6. Alexandr Mitrofanov (62%) 7. Robert Čásenský (62%) 8. Filip Rožánek (60%) 9. ČT24 (59%) 10. Médiář (58%) 11. Bohuslav Sobotka (58%) 12. Michal Kubal (58%) 13. Miloš Čermák (58%) 14. DVTV (58%) 15. František Lutonský (57%) 16. Jiří Hošek (56%) 17. Týdeník Respekt (56%) 18. Petr Honzejk (55%) 19. Miroslav Kalousek (54%) 20. Josef Šlerka (54%)
Foreign media BBC Breaking News CNN Breaking News Reuters Top News The Economist The New York Times
Conclusion Strong similarity in followed accounts. Strong orientation rather inside the group than outside. Few external actors. There is practically no voice of other political orientation than the center-right and liberal.
Limitations Biased dataset Unknown role of the Twitter recommendation algorithm
Thnx @josefslerka, @petrkou josef.slerka@ff.cuni.cz, petr.koubsky@ff.cuni.cz

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