If I was to add one thing to the Narasimhan et al. 2018 preprint, it’d be a series of uncomplicated qpGraph trees that back up, very simply and directly, the main conclusions in the manuscript. Such as this:
If some of you think that it’s possible to show pretty much anything in these sorts of graphs, then you’re wrong. For instance, it’s not possible to swap West_Siberia_N for Sintashta, because the highest Z score usually blows out from almost nothing to well over five. And it’s not possible to push Sintashta-related ancestry into Dravidian-speakers from South India. But if you think it is, then, by all means, have a go. The graph file is here.