Chipotle Takes a Page, and a C.E.O., From Taco Bell

Struggling after a string of food safety crises and a plunging stock price, Chipotle turned to Brian Niccol to replicate the success he had at Taco Bell.

In its prime, Chipotle Mexican Grill positioned itself as the paragon of cool casual dining, a darling of Wall Street, a restaurant industry innovator.Basically, nothing like Taco Bell.How the tables have turned. Chipotle has spent the past few years struggling to recover from a string of food safety crises, abandonment by its customers and a plunging stock price. For help, the chain is turning...