Exclude the proxy and validate subgroup performance: Which approach meets the condition?
Exclude the location proxy and validate subgroup performance using non-location alternatives.
The question
An energy-maintenance model uses service location, which closely tracks neighborhood income. The approval condition requires avoiding reliance on that proxy where equivalent non-location information is available, while still checking performance across affected areas. Which approach meets the condition?
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- Aggregate location into larger regions and retain it after checking residual correlations.Aggregation may weaken the proxy but does not establish that reliance on location is avoided when equivalent non-location information exists.
- Encrypt location before training.Encryption protects access but does not remove the location signal if the model can use the decrypted feature.
- Retain location when overall accuracy improves materially, then monitor area-level results.Accuracy improvement does not override the explicit requirement to avoid the proxy where equivalent alternatives are available.
- Exclude the proxy and validate subgroup performance with alternatives. ✓Excluding location follows the stated condition, while subgroup validation checks performance across affected areas using non-location information.
The trap
When an identified proxy has equivalent alternatives, evaluate the alternative model rather than merely masking or coarsening the proxy. How to remember it
Exclude the location proxy and validate subgroup performance using non-location alternatives.
How many of these would you get right?
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