Drivers earning the median amount of revenue are getting 59 cents per mile driven, researchers said, but expenses take out 30 cents, meaning drivers turn a profit of 29 cents per mile, NPR reported.
In a statement to The Guardian, an Uber spokesman called the methodology and results "deeply flawed."
“We've reached out to the paper's authors to share our concerns and suggest ways we might work together to refine their approach,” the spokesman wrote.
According to MIT researchers, 80 percent of drivers polled said they work less than 40 hours per week.
Uber and Lyft have "notoriously high" turnover rates among drivers, NPR reported, with only 4 percent of the drivers staying with Uber for at least a year.