UNEMPLOYMENT

This variable is the unemployment rate by state.

Data source: The local area unemployment statistics can be obtained from the U.S. Bureau of Labor Statistics website at: https://www.bls.gov/lau/.

POPULATION

This variable is the natural logarithm of the population size by county.

Data source: The population and housing unit estimates can be obtained from the United States Census Bureau website at: https://www.census.gov/programs-surveys/popest/data/data-sets.html.