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This article investigates the influence of electoral manifestos on the online communication of electoral candidates. Our study addresses electoral candidates' conflict between party discipline and individual issue prioritisation. Building on the salience framework, we examine the thematic congruence between manifestos and online communication. Moreover, we test which issues are emphasised during the 2017 German federal election campaign. To this end, we created an original topic dictionary based on party manifestos. Applying the dictionary, we classify 143,969 tweets by 797 candidates. Our analyses demonstrate that manifestos shape the online communication of electoral candidates substantially. The findings show that electoral candidates of left–wing parties focus on core issues over time. Our results not only highlight the authority of party leadership, but also suggest that politicians do not tap the whole potential of online communication.

Research on social processes in the production of scientific output suggests that the collective research agenda of a discipline is influenced by its structural features, such as "invisible colleges" or "groups of collaborators" as well as academic "stars" that are embedded in, or connect, these research groups. Based on an encompassing dataset that takes into account multiple publication types including journals and chapters in edited volumes, we analyze the complete co-authorship network of all 1,339 researchers in German political science. Through the use of consensus graph clustering techniques and descriptive centrality measures, we identify the ten largest research clusters, their research topics, and the most central researchers who act as bridges and connect these clusters. We also aggregate the findings at the level of research organizations and consider the inter-university co-authorship network. The findings indicate that German political science is structured by multiple overlapping research clusters with a dominance of the subfields of international relations, comparative politics and political sociology. A small set of well-connected universities takes leading roles in these informal research groups.