But the question may not be as ridiculous as it sounds. In 2007, a study at California State University in Northridge showed that professors who provide chocolate to students filling out course evaluations can expect higher ratings than those who don’t. This makes sense: If graduate school taught me anything (and sometimes it’s questionable whether graduate school taught me anything), it’s that one should never underestimate the power of free food.
https://www.sciencemag.org/careers/2019/10/grad-students-thesis-committees-no-more-hors-doeuvres
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