Figure 3
A toy example of expressing a hypothesis through a transition probability matrix. The matrices are symmetrical. The diagonal is empty since the data do not allow self-loops. According to each hypothesis, the cells with more likely transitions are coloured in darker shades of blue. (a) Uniform hypothesis - all transitions are equally possible, i.e. the editions are covering random topics. (b) Shared religion hypothesis - the dyads Russian-Ukrainian and Polish-Estonian are given more belief on the basis of shared religion. (c) Geographical proximity hypothesis - the shorter the distance between languages, the stronger belief in the transition.