Code and data for Pichkar et al. PNAS 2024, "Genetic and linguistic comparisons reveal complex sex-biased transmission of language features"

This repository includes code and data to repeat analyses in "Genetic and linguistic comparisons reveal complex sex-biased transmission of language features" by Pichkar, Surowiec, and Creanza, PNAS 2024

Required packagesThis code runs in R (written for 4.3.1) with several packages. The following can be installed with install.packages: maps, ggplot2, magrittr, dplyr. To generate the mtDNA distance matrix, you will also need to install the ape package.
Instructions for installing the rethinking package can be found here: https://github.com/rmcelreath/rethinking
Running the codeIn the code directory, either run all the code together with Rscript run_all_together.R or source each file separately in R or Rstudio:
"collect_data_for_analysis.R" : uses the files in the 'data' directory to generate objects that are used for analysis. Must be run before other scripts.
"worldwide_threshold_coef.R" : analysis of worlwide trends, and creation of line plots for nuclear and mtDNA analyses.
"per_pop_coef.R" : analysis of coefficient values per population and the creation of maps to plot those values.
"worldwide_endoexogamy_coef.R" : extended analysis that measures the effects of endogamy -- rather than those of postmarital residence and descent patterns, which are included in the previous two files.