{
  "paper": {
    "arxiv_id": "2507.15113",
    "title": "Click A, Buy B: Rethinking Conversion Attribution in E-Commerce Recommendations",
    "url": "https://arxiv.org/abs/2507.15113"
  },
  "dataset": {
    "name": "MovieLens-1M",
    "users": 420,
    "items": 640,
    "full_catalog_evaluation": true
  },
  "setup": {
    "seed": 42,
    "mechanism": "cross_item_attribution"
  },
  "baseline": {
    "name": "last-click single-item conversion attribution",
    "hit_at_10": 0.14047619047619048,
    "ndcg_at_10": 0.07513562832974019,
    "mrr_at_10": 0.05541099773242629,
    "head_share_at_10": 0.21761904761904763
  },
  "method": {
    "name": "CABA/CABB multi-task attribution + taxonomy collaboration",
    "hit_at_10": 0.15714285714285714,
    "ndcg_at_10": 0.10045409994697922,
    "mrr_at_10": 0.083234126984127,
    "head_share_at_10": 0.1411904761904762
  },
  "relative": {
    "hit_at_10_percent": 11.864406779661014,
    "ndcg_at_10_percent": 33.697025206372665,
    "mrr_at_10_percent": 50.21228707350765,
    "head_share_at_10_percent": -35.12035010940919
  },
  "diagnostics": {
    "cross_item_pairs": 33852,
    "validation_blend_weight": 0.75,
    "validation_ndcg_candidates": [
      0.066579,
      0.087861,
      0.09269,
      0.079929
    ]
  },
  "paper_results": {
    "primary_business_metric_percent": 0.25
  },
  "scope": "以连续交互模拟 Click-A/Buy-B，实际训练同物品与跨物品归因分支，并使用 genre taxonomy 协同权重；未复刻 Pinterest 转化窗口、广告曝光和真实购买标签。",
  "schema_version": 2,
  "manifest_ref": "reproduction:click-a-buy-b",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single/few-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2507.15113-click-a-buy-b/metrics/movielens-1m-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}