After noticing that there are no cross-cultural phylogenetic studies of grandparent terminologies, the authors use the record from 134 Pama-Nyungan languages to explore the evolution of this kinship category and to evaluate the effects of social structures in this evolution. The authors suggest that there used to be four different terms for grandparents in the proto-Pama-Nyungan language family, which was supported by the data. The results show no evidence of co-evolution between these grandparent systems with neither community marriage organization nor post-marital residence. There is not a significant correlation between grandparent and cross-cousin terms; however, there is some evidence that grand-child terms are correlated to grandparent systems.

After noticing that there are no cross-cultural phylogenetic studies of grandparent terminologies, the authors use the record from 134 Pama-Nyungan languages to explore the evolution of this kinship category and to evaluate the effects of social structures in this evolution. The authors suggest that there used to be four different terms for grandparents in the proto-Pama-Nyungan language family, which was supported by the data. The results show no evidence of co-evolution between these grandparent systems with neither community marriage organization nor post-marital residence. There is not a significant correlation between grandparent and cross-cousin terms; however, there is some evidence that grand-child terms are correlated to grandparent systems.

Aiming to better understand human demographic and dispersal history, the study uses Bayesian phylogenetic comparative methods to trace post-marital residence and cultural changes among 27 Indo-European and 135 Austronesian languages. They suggest that changes from uxorilocality to other types of residences (neolocality and virolocality) are more common than the inverse transitions. The results are generally supported with one exception: Austronesian societies have a higher rate of transition from neolocality to uxorilocality (1.5) than the other way around (0.9). Other relevant findings are that proto-Indo-European societies tend to follow virilocality, while proto-Malayo-Polynesian uxorilocality. There is a commonality for both language families to present instability of uxorilocality and unusual loss of uxorilocality.

Aiming to better understand human demographic and dispersal history, the study uses Bayesian phylogenetic comparative methods to trace post-marital residence and cultural changes among 27 Indo-European and 135 Austronesian languages. They suggest that changes from uxorilocality to other types of residences (neolocality and virolocality) are more common than the inverse transitions. The results are generally supported with one exception: Austronesian societies have a higher rate of transition from neolocality to uxorilocality (1.5) than the other way around (0.9). Other relevant findings are that proto-Indo-European societies tend to follow virilocality, while proto-Malayo-Polynesian uxorilocality. There is a commonality for both language families to present instability of uxorilocality and unusual loss of uxorilocality.

After noticing that there are no cross-cultural phylogenetic studies of grandparent terminologies, the authors use the record from 134 Pama-Nyungan languages to explore the evolution of this kinship category and to evaluate the effects of social structures in this evolution. The authors suggest that there used to be four different terms for grandparents in the proto-Pama-Nyungan language family, which was supported by the data. The results show no evidence of co-evolution between these grandparent systems with neither community marriage organization nor post-marital residence. There is not a significant correlation between grandparent and cross-cousin terms; however, there is some evidence that grand-child terms are correlated to grandparent systems.

Using phylogenetic comparative methods, the study explores the evolution of kinship terminologies within 176 societies in Austronesian, Bantu, and Uto-Aztecan language families. The authors consider 18 theories in the anthropological record that suggests that change in kinship terminologies is predicted by some social structures: marriage, residence, and descent. Only 19 of the 29 statistical hypotheses are supported, while none of the theories are supported in all three language families. This statistical irregularity means that the results are lineage-specific, instead of showing a universal driver of change in kinship terminology types.

After noticing that there are no cross-cultural phylogenetic studies of grandparent terminologies, the authors use the record from 134 Pama-Nyungan languages to explore the evolution of this kinship category and to evaluate the effects of social structures in this evolution. The authors suggest that there used to be four different terms for grandparents in the proto-Pama-Nyungan language family, which was supported by the data. The results show no evidence of co-evolution between these grandparent systems with neither community marriage organization nor post-marital residence. There is not a significant correlation between grandparent and cross-cousin terms; however, there is some evidence that grand-child terms are correlated to grandparent systems.

After noticing that there are no cross-cultural phylogenetic studies of grandparent terminologies, the authors use the record from 134 Pama-Nyungan languages to explore the evolution of this kinship category and to evaluate the effects of social structures in this evolution. The authors suggest that there used to be four different terms for grandparents in the proto-Pama-Nyungan language family, which was supported by the data. The results show no evidence of co-evolution between these grandparent systems with neither community marriage organization nor post-marital residence. There is not a significant correlation between grandparent and cross-cousin terms; however, there is some evidence that grand-child terms are correlated to grandparent systems.

How is the evolution of language shaped by speaker population size? Through comparative data analyses of 153 language pairs from the Austronesian, Indo-European, and Niger-Congo language families, the authors find that the influence of population size on language evolution is not the same in the three language families. Only in Indo-European languages did a smaller population size of language-speakers significantly predict more word loss.

The "equi-complexity hypothesis" suggests that there is an equal complexity across languages, meaning that there are constant trade-offs between different domains. Using phylogenetic modelling in a sample of 244 languages, this study follows a diachronic perspective to explore if there is an inversed coevolution within the grammatical coding of nominal and verbal domains. The results show that while there appears to be a coevolutionary relationship between some features of these two domains, there is no evidence to support the idea that all languages maintain an overall equilibrium of grammatical complexity. Rather, the correlation nominal and verbal domains vary between lineages. Austronesian languages do not show a coevolution between the domains. Sino-Tibetan languages seem to have a positive correlation while Indo-European languages appear to have a negative correlation, meaning that this inverse coevolution can be lineage specific.