Holiday giving season complicated by shifting norms on gratuities, psychologist suggests

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A tip for food servers: Encourage separate checks at large tables to get a bigger tip. Photo by Mary Butkus WUSTL Photo
A 'tip' for food servers: Encourage separate checks at large tables to get a bigger tip. Photo by Mary Butkus / WUSTL Photo

With the holiday season upon us, Americans are grappling more than ever with what's appropriate when it comes to rewarding service providers with tips, gifts and other token gratuities, suggests Leonard Green, a psychology professor in Arts & Sciences who studies tipping behavior at Washington University in St. Louis.


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