{
  "id": "ad-features-need-variation",
  "claim": "On 8,609 matched paid impressions from a single creative set, ad-creative embeddings added no reliable allocation signal in paired ablations vs indicator-only and random vectors.",
  "definition": "Structural zero-variance limit for ad features in page allocation models.",
  "numbers": [
    {
      "label": "matched_impressions",
      "value": 8609
    },
    {
      "label": "distinct_creative_sets",
      "value": 1
    },
    {
      "label": "real_embedding_paired_delta_pp",
      "value": 0.48
    },
    {
      "label": "real_embedding_p_le_0",
      "value": 0.31
    }
  ],
  "canonical_url": "https://lutiq.com/research/ad-features-need-variation/",
  "methods_url": "https://lutiq.com/research/ad-features-need-variation/",
  "open_data_url": "https://lutiq.com/data/research/ad-feature-degeneracy-2026-07.json",
  "sources": [
    "https://lutiq.com/research/ad-features-need-variation/"
  ],
  "last_verified": "2026-08-06",
  "caveats": [
    "One window where matched traffic lacked creative variation; does not prove ad content never helps."
  ],
  "_meta": {
    "schema": "https://lutiq.com/data/answer-packets/_schema.json",
    "publisher": "Lutiq"
  }
}