Ghana’s Indigenous Intel Challenge [BEGINNERS ONLY]
Helping Ghana, Algeria
and 53 other countries
and 53 other countries
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$2 500 USD
Challenge completed ~2 months ago
Prediction
910 joined
565 active
Start
Aug 14, 25
Close
Oct 12, 25
Reveal
Oct 12, 25
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user_id
4 Sep 2025, 02:21 · 2
Can including user_id as a feature in my model cause data leakage?
I do not think so since there is a temporal shift between train and test, but it can be a good base for aggregation features. and since some users are only in the test set a proper cv startegy will be by holding some users to validate on so you get to mimic the train test split on predicting on unseen users.
Thanks Satti for this insightful idea.