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Hornbein
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the professors devised an algorithm to identify how review text on Yelp is associated with regulatory inspections. They found that food handling violations are predicted by words like “sick” and “nauseous,” while the presence of pests is predicted by words like “cockroaches” and “filthy.”
https://hbswk.hbs.edu/item/what-happens-when-restaurants-ignore-online-reviews
https://hbswk.hbs.edu/item/what-happens-when-restaurants-ignore-online-reviews