Pith Number

pith:A2QSUACZ

pith:2026:A2QSUACZ3HKK7PZXDNVJ4XFQMT

not attested not anchored not stored refs pending

Built-in Selection Bias in Proportional Hazards Models with Omitted Covariates: Simulation Evidence and Alternative Approaches

Ayoub Bifenzi, Helene Jacqmin-Gadda

arxiv:2606.19982 v1 · 2026-06-18 · stat.ME

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A2QSUACZ3HKK7PZXDNVJ4XFQMT}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-06-19T16:12:59.780099Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

06a12a0059d9d4afbf371b6a9e5cb064f6011dea125c6f595ddae00358983e1c

Aliases

arxiv: 2606.19982 · arxiv_version: 2606.19982v1 · doi: 10.48550/arxiv.2606.19982 · pith_short_12: A2QSUACZ3HKK · pith_short_16: A2QSUACZ3HKK7PZX · pith_short_8: A2QSUACZ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/A2QSUACZ3HKK7PZXDNVJ4XFQMT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 06a12a0059d9d4afbf371b6a9e5cb064f6011dea125c6f595ddae00358983e1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2b266f5b721c58afa98654fd48bafb987d351b6e7728cd2fc07639e83fed4183",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2026-06-18T09:23:32Z",
    "title_canon_sha256": "10f86595dbae6fdd71175fd0662c26dbe5c21ce340a8f337b1c6acf0abebf9dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.19982",
    "kind": "arxiv",
    "version": 1
  }
}