The dataset is for the publication:
Chen X, Jia P (2019). A comparative analysis of accessibility measures by the two-step floating catchment area (2SFCA) method. International Journal of Geographical Information Science, 33(9), 1739-1758.
These data were derived from the following resources available in the public domain: SNAP retailers database https://www.cbpp.org/snap-retailers-database and TIGER/Line with selected demographic and economic data https://www.census.gov/geo/maps-data/data/tiger-data.html