Owning An iPhone Is Best Indicator If Someone Is Rich

FiveThirtyEight.com is reporting about a new study from the University of Chicago.
How can you tell if someone is rich?
The University determined owning an iPhone is the most reliable indicator of whether someone is rich.
---Across all years in our data, no individual brand is as predictive of being high-income as owning an Apple iPhone in 2016.---
Previous brands that occupied this dubious role were Land O’ Lakes butter in 2004.
Also Grey Poupon Dijon in 1992.