US federal prison populationUS candle market retail sales
As the federal prison population has declined, candle sales have grown, a negative correlation of -0.977 that connects criminal justice reform to scented wax with the aromatic confidence of a chart that treats decarceration and yankee candle as inverse measures of the same cultural shift. The cells empty, the candles light, and both trends measure a nation that is simultaneously releasing its prisoners and perfuming its living rooms.
Candle sales surged in the cozy-lockdown year of 2020 while the federal prison population fell sharply, thanks to early releases aimed at thinning out crowded facilities before outbreaks spread. The correlation captures the two ends of the same pandemic — one crowd going home to light scented candles, another being sent home from a cell block.
Eight years of fewer prisoners and more candles is a correlation between two forms of social change: one structural (criminal justice reform) and one commercial (wellness consumerism), both moving in opposite directions during the same decade. The cell door opens, the match is struck, and the chart records both with the scented precision of a coefficient that does not distinguish between freedom and fragrance.
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Want to learn more about why correlations like “US federal prison population” vs “US candle market retail sales” don't prove causation? Read our guide to statistical thinking.