Netflix is betting on the co-CEO model. Here's why it's worked for some companies like Warby Parker, but not for others like Deutsche Bank.

· Netflix recently named its content chief, Ted Sarandos, co-CEO along with Reed Hastings.
· The co-CEO system is nothing new — Chipotle, Whole Foods, Deutsche Bank, and Samsung have had more than one CEO at the same time. 
· Having more than one chief executive can help a company accomplish more, but the system is...