Tipping

In a blog post, CEO Tony Xu said that the company would no longer use the tip money to cover drivers' base pay.

The suspect made "bizarre statements about giving away his child on Facebook," an arrest affidavit said.

"The only thing we can do is adapt and mitigate further global warming—it's too late for there to be no effect," the study's author warned.

Service workers' mental health could be negatively impacted by "the customer is always right" mentality, researchers said.

Think more than 20 percent is too much? Try 800,000 percent on for size.

The Department of Labor has not been honest about the billions of dollars in workers' wages that could be lost due to a new rule change, critics say.

Wealth appears to be the biggest factor in determining how well a person tips.

Tipping encourages a willingness to please by waiters that would be out of place in a European restaurant.

The ride-sharing company argues that inherent racial biases in passengers will create inequalities among drivers if tipping is allowed.