Corporate America can learn a lot from a chicken burrito. As many companies struggle to boost prices without alienating consumers, they may want to study Mexican-food chain Chipotle, which has managed to do both. Companies including Chipotle Mexican Grill Inc (CMG.N), Apple Inc (AAPL.O) and PepsiCo (PEP.N) have shown they're able to take advantage of quality, trendiness, and, in the case of Pepsi's snack foods, market dominance, to maintain high prices or even raise them faster than the inflation rate, now at about 2.1 percent in the U.S. Chipotle raised chicken-dish prices by 5 percent this year after leaving them...