Only 1 of passengers always tip their Uber drivers, a new study of 40 million rides found UBER

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A new study of more than 40 million Uber rides revealed a trend that many drivers have known to be true for years.

Only about 16 of Uber rides receive tips, and only 1 of riders leave a tip for every single ride, the study found.

The researchers, who published their findings in conjunction with the National Bureau of Economic Research, also found that higher-rated drivers and riders receive more tips and tip more often.

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Only a tiny fraction of Uber riders are sure to always tip their driver, according to a new analysis of more than 40 million rides.

Gender, age, and the quality of a trip can also have a big impact on the size of that gratuity, researchers from Stanford, the University of California at San Diego, and the University of Chicago said in a paper published Monday by the National Bureau of Economic Research.See the rest of the story at Business InsiderNOW WATCH: 8 prostheses that are changing livesSee Also:Lyft has made airport pickups quicker and less confusing by taking a page from the taxi playbookElon Musk reportedly testified that he's low on cash and assets that could quickly be turned into cashNASA reportedly paid SpaceX 5 million to make sure its employees didn't use illegal drugs after Elon Musk smoked pot on cameraSEE ALSO: Lyft has made airport pickups quicker and less confusing by taking a page from the taxi playbook

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