this post was submitted on 25 Dec 2023
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You'd be surprised at how many of those things you think are random would actually emerge as a pattern in long enough purchase history data.
For example, it might be that there's a seasonality to your being in the mood. Or other things you'd have brought a week before, etc.
Over a decade ago a model looking only at purchase history for Target was able to tell a teenage girl was pregnant before her family knew just by things like switching from scented candles to unscented.
There's more modeled in that data than simply what's on the receipt.