  We introduce relational hyperevent models (RHEM) as a generalization of
relational event models to events occurring on hyperedges involving any number
of actors. RHEM can specify time-varying event rates for the full space of
directed or undirected hyperedges and can be applied to model, among others,
meetings, team assembly, team performance, or multi-actor communication. We
illustrate the newly proposed model on two empirical hyperevent networks about
meetings of government ministers and co-authoring of scientific papers.
