Data, not arms, the key driver in emerging US-China cold war | Robert Reich

Cybersecurity comes down to which side has access to more information about the other and can utilize it best

This week, shares in China's giant ride-hailing app Didi crashed by more than 20%. A few days before, Didi had raised $4.4bn in a massive IPO in New York - the biggest initial public offering by a Chinese company since Alibaba's debut in 2014.

The proximate cause of Didi's crash was an announcement by China's Cyberspace Administration that it suspected Didi of illegally collecting and using personal information. Pending an investigation, it had ordered Didi to stop registering new users and removed Didi's app from China's app stores.

Related: Didi the latest casualty as China tackles tech's barbaric growth'

Robert Reich, a former US secretary of labor, is professor of public policy at the University of California at Berkeley and the author of Saving Capitalism: For the Many, Not the Few and The Common Good. His new book, The System: Who Rigged It, How We Fix It, is out now. He is a columnist for Guardian US.