An exploration of distance-based models of language relationships with a special focus on Indo-European (Kozintsev 2018)

The latest edition of the Journal of Indo-European Studies includes an interesting methodological paper by Alexander Kozintsev, in which the author tests the relationship between Indo-European and other language families using lexicostatistical data and a wide range of distance-based models (see here). My impression, after reading the paper a couple of times, is that we probably have a long way