Robin W. Spencer and Samuel M. Otterstrom
Massive Genealogies Distinguish Frontier from Steady-State Internal Migration in arXiv

Kaplanis et al, 2018, Quantitative analysis of population-scale family trees with millions of relatives. Science, 360(6385), pp.171-175. Science paper and data mirror site

2010 US census study of young adults: introduction, website, and data files

All code is original javascript without any frameworks or libraries, implemented for the browser. The original datafiles are large (16 Gb for Kaplanix and 45 Mb for US census), requiring serial asynchronous processing. For convenience, most analysis is carried synchronously on specific subsets (for example American colonial or Britain and Ireland) based on profile birth and death locations and dates, or the availability of parent-child relationships. These subsets are available from the author on request.