Tract values were derived from the American Community Survey datasets. To arrive at our map display values, we calculated the percentage change between the 2016 and 2010 data to measure differences over time. CTA and new buildings data were downloaded from the city of Chicago's data portal.
To calculate our Gentrification Index we averaged the percentile ranks (0-1; 0 being the least or negative growth; 1 being the most growth) of the percentage change of the following fields for each tract in Cook County. Inverse fields (1-x) are distiguished because those of a higher percentile are assumed to not indicate areas of higher gentrification. Thus, taking the inverse of this entire index may result in a Displacement Index.
Overall population growth
Per Capita Income
Some college or higher population
Rental:Owner housing unit ratio
Only high school or less population (inverse)
Homeless population (inverse)
Unenployment rate (inverse)
Poverty rate (inverse)