It’s enough to drive you crazy.

A new study shows that drivers for ride-hailing companies Uber and Lyft show preferential treatment to white men over women and African American passengers. My colleague, senior editor Kristen Bellstrom, is on the story:

The study, which was conducted in Boston and Seattle by researchers from the Massachusetts Institute of Technology, Stanford University, and the University of Washington, found three notable trends: In Seattle, black people waited longer for Uber and Lyft drivers to accept their ride requests, and black riders waited up to 35% longer to be picked up by their UberX drivers. In Boston, Uber drivers cancelled on men with “African American sounding” names more than twice as often as on other men. Meanwhile, both ride-hailing companies took women in Boston for longer and more expensive rides than men.”

Click through to read her entire analysis.

The questions raised by studies like this, including the now famous one on the bias on the Airbnb platform, are being answered in similar ways – anti-discrimination pledges, platform design tweaks, empathy training. But at the core is an existential problem. Can technology begin to curb the human biases that society has been struggling with for generations? We’ll be putting that question to a diverse array of experts in the coming weeks.

Programming note: Fortune has launched Brainstorm Health, a must-read daily newsletter focusing on human health, big data, innovation and smart business. This afternoon, the inaugural Brainstorm Health Conference begins in San Diego and will be taking the conversation live. Follow the stream here.