"Gratitude motivates positive reciprocal behavior," says Randy Raggio, a marketing professor at the University of Richmond.
“感激可以激发起积极的互惠行为，”里士满大学(University of Richmond)营销学教授兰迪·拉希奥说。
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Customer appreciation, Raggio says, usually comes in the form referring a friend, writing a positive review online, or perhaps a willingness to pay more later on.