Mikko Laitinen is Professor of English at the University of Eastern Finland. He is an elected member of the Finnish Academy of Sciences and Letters and one of the leaders in the national research infrastructure for digital humanities, FIN-CLARIAH. His research focuses on language change in digital social networks, and he is the principal investigator of 'Weak-Tie Hypothesis in Complex Digital Networks' (COMET), a project funded by the Research Council of Finland. Paula Rautionaho is Senior Researcher at the School of Humanities, University of Eastern Finland. Her research focuses on grammatical alternations in World Englishes and recent British English. She has coedited two volumes in John Benjamin's Studies in Corpus Linguistics series and Routledge's Studies in Sociolinguistics series.