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Big-box grocery stores are easy sources of data on human purchasing behavior. Any modern retail outlet monitors activity such as customer flow through the aisles, brand affinity, and, of course, the customer loyalty cards that do as good a job of profiling a person as anything. After all, you are what you eat.

Both are based in the Seattle area, and for much of their histories, the two companies haven’t butted heads. But their respective cloud pushes have helped give the region the reputation as the cloud capital.?And while they now compete fiercely, the two tech giants?are also learning from one another.

Boeing knew it had to act aggressively and quickly to preserve market share, so it abandoned plans for an entirely new plane because design, testing and certification by the Federal Aviation Administration, or FAA, and other national regulators could take as long as 10 years. To remain competitive, Boeing updated an existing plane, the NG.

Birkenstock, the German shoemaker famous for its sandals, has announced it will stop selling products?on Amazon and will prevent third parties from selling its products on the site, according to a letter by Birkenstock Americas CEO David Kahan?obtained by CNBC.?The ban will go into effect January 1, 2017.

Boeing's decision Monday to fire Chief Executive Officer Dennis Muilenburg is a needed first step in restoring the company's credibility and the market reacted favorably to the action, but it raises questions about top management's long-term strength in a competitive field, analysts said.