A recent report from researchers at the University of California-Berkeley Labor Center estimated a driver working 15 hours per week could see an hourly wage floor of just $4.82 when accounting for time between rides, additional benefit costs and mileage that goes unreimbursed.

Alleging “loopholes” in a proposed ballot question, researchers at the University of California-Berkeley estimated Wednesday that drivers for Uber and Lyft would be guaranteed less than 40% of the Massachusetts minimum wage if the proposal becomes law.