Furniture and TV tip-over ER injuriesJapanese vending machines
The suggestion that American furniture safety and Japanese vending machines are statistically coupled is the sort of thing one files under "coincidences too large for a single brain." Somewhere, a dresser falls in Ohio, and a vending machine in Osaka stops selling. The universe keeps curious books.
Japanese vending machine counts have been in gentle long decline as convenience stores eat the business and urban rents rise, while US furniture tip-over ER injuries rose sharply in 2020 as locked-down families spent unprecedented hours at home with new WFH furniture and restless children. Two entirely unrelated trends that happened to bend in the same year for entirely separate reasons.
So the correlation is accidental geometry. A long quiet decline in one country and a sharp pandemic spike in another. The calendar, as ever, did the matchmaking.
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Want to learn more about why correlations like “Furniture and TV tip-over ER injuries” vs “Japanese vending machines” don't prove causation? Read our guide to statistical thinking.