Graph, Completely at home by income (IMAGE) University of California - Davis Caption A graph from the study depicts the percentage of people staying completely at home on weekdays, by income quintile. The highest income levels are represented in yellow, and the lowest are in purple. This was measured with census-tract level income using SafeGraph mobile phone data. Credit J.Weill et. al. Usage Restrictions Provide credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.