What data on 40m rides tell us about how people tip Uber drivers

What data on 40m rides tell us about how people tip Uber drivers:

To tip, or not to tip — that is the question. In a new NBER working paper, researchers analyzed more than 40m Uber trips during a 4-week span in 2017 and looked at how much riders tipped, and how these tips varied based on a multitude of factors.
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