Cook County Treasurer Maria Pappas has released the findings of a landmark study that show that the practice of “redlining,” which was used to deny loans to minority homebuyers during and after the Great Depression, is still having negative consequences for numerous portions of the county.

Pappas took the step of commissioning a study to find out why the decades-old practice of “scavenger sales” weren’t helping to reverse urban decay, and weren’t helping to get properties back on the tax rolls.