Tattoo parlors and farmers markets, though they cater to broadly overlapping demographics, are not obviously linked. And yet, here they are. One sells ink and the other sells arugula, and apparently the universe treats them as the same hobby.
Both series moved sharply in 2020 for pandemic reasons. Farmers markets boomed as an outdoor, supply-chain-proof grocery option during lockdowns, while tattoo parlors were ordered closed for months and reopened to enormous backlogs as customers returned with lockdown savings and new tattoo ideas. One serves outdoor produce; the other serves pent-up demand for fresh skin.
So the correlation is two very different cash-and-skin trades, both tracking the same lockdown-and-release cycle. One was always outdoors; the other finally got to reopen. Both drew crowds.
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Want to learn more about why correlations like “Tattoo parlors in the US” vs “Farmers markets in the US” don't prove causation? Read our guide to statistical thinking.