An associate professor at the Harvard Business School ordered food at a local Chinese restaurant and was baffled when every item on the bill was a dollar more expensive than the listing price shown at the online menu . The average person would've dropped it and moved on suspecting that the online menu was outdated, but not Ben, he specializes in "preventing and detecting online fraud" and was not going to let this mom-and-pop owned restaurant off the hook so easily.

Below is an email thread between Professor Ben Edelman and the chain's manager Ran Duan, who has worked with his family at the store since it opened.

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