After Uber disputed a Massachusetts Institute of Technology study that concluded ride-hailing drivers earn a median of $3.37 an hour, the study’s lead researcher has recalculated the figure, but he has also urged Uber to be more transparent.

Stephen Zoepf, executive director of the Center for Automotive Research at Stanford University, posted on Twitter Monday a statement in which he admitted that Uber’s criticism of the research draft — in the form of a tweet by CEO Dara Khosrowshahi plus a detailed post by the San Francisco company’s chief economist, Jonathan Hall, over the weekend — was valid. So Zoepf ran the numbers again, and came up with a different figure for what Uber and Lyft drivers earn after taking into account the costs of owning and operating their vehicles: a median of $8.55 an hour.

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“Whatever the accuracy of these respective claims, this is a movement that’s going in the right direction,” said William Gould IV, Charles A. Beardsley Professor of Law, Emeritus at Stanford Law School, in an interview Tuesday. “Transparency is going to be the general trend.”