From social network analysis point of view, you may be able to study central authors in a network (e.g. using degree and betweennes centrality), understand clusters, and study strength network ties among authors (e.g. who publish with whom). You may also study institutional, country, and regional leval collaboration patterns, and much more..it is basic kind of analysis and may provide some clues.
You can easily do it using UCINet, Pajek, or NodeXL, etc.