Business travelers are a busy bunch, no doubt. Apparently they're so busy, in fact, that they can't keep their favorite restaurants, airlines, car rental companies and hotels straight.
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Starbucks, Delta Air Lines, Avis, and Marriott had the largest percentage of receipts in their respective categories, according to new data from Certify, a travel and expense report management company. But Chick-fil-A, Southwest Airlines, Enterprise, and Residence Inn got the travelers' highest ratings.
Why the split?
Corporate policy, said Robert Neveu, president of Certify. Companies have preferred vendors, so employees often have to patronize businesses they don't love.
"It's bipolar if you will," he said. "Corporate policy says do one thing, but the users want to do something else."
(Read more: On jammed jets, travelers turn on one another)