Does Owning Apple Products Predict Your Wealth?

In the United States, if you have an Apple iPhone or iPad, it's a strong sign that you make a lot of money.
That's one of the takeaways from a new National Bureau of Economic Research working paper from University of Chicago economists Marianne Bertrand and Emir Kamenica.
"Across all years in our data, no individual brand is as predictive of being high-income as owning an Apple iPhone in 2016," the researchers wrote.