Journal of Language Evolution, 2020, 17–38 doi: 10.1093/jole/lzz009 Advance Access Publication Date: 28 December 2019 Research article Best practices in justifying calibrations for dating Downloaded from https://academic.oup.com/jole/article/5/1/17/5688948 by Uppsala Universitetsbibliotek user on 16 October 2020 language families L. Maurits *,†, M. de Heer‡, T. Honkola§, M. Dunn**, and O. Vesakoski§ †Department of Geography and Geology, University of Turku, Turku, Finland, ‡Department of Modern Languages, Finno-Ugric Languages, University of Uppsala, Uppsala, Sweden, §Department of Biology, University of Turku, Turku, Finland and **Department of Linguistics and Philology, University of Uppsala, Uppsala, Sweden *Corresponding author:
[email protected] Abstract The use of computational methods to assign absolute datings to language divergence is receiving renewed interest, as modern approaches based on Bayesian statistics offer alternatives to the discred- ited techniques of glottochronology. The datings provided by these new analyses depend crucially on the use of calibration, but the methodological issues surrounding calibration have received compara- tively little attention. Especially, underappreciated is the extent to which traditional historical linguistic scholarship can contribute to the calibration process via loanword analysis. Aiming at a wide audi- ence, we provide a detailed discussion of calibration theory and practice, evaluate previously used calibrations, recommend best practices for justifying calibrations, and provide