Pith Number

pith:II4H2NEQ

pith:2021:II4H2NEQFU5NBJTGBUDZWNGFYP

not attested not anchored not stored refs pending

Testing Biased Randomization Assumptions and Quantifying Imperfect Matching and Residual Confounding in Matched Observational Studies

Bo Zhang, Kan Chen, Qi Long, Siyu Heng

arxiv:2107.00815 v3 · 2021-07-02 · 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{II4H2NEQFU5NBJTGBUDZWNGFYP}

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	2026-07-05T04:32:50.343274Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

42387d34902d3ad0a6660d079b34c5c3c1dc819cbd00a959890b98e2d9c3f942

Aliases

arxiv: 2107.00815 · arxiv_version: 2107.00815v3 · doi: 10.48550/arxiv.2107.00815 · pith_short_12: II4H2NEQFU5N · pith_short_16: II4H2NEQFU5NBJTG · pith_short_8: II4H2NEQ

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/II4H2NEQFU5NBJTGBUDZWNGFYP \
  | 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: 42387d34902d3ad0a6660d079b34c5c3c1dc819cbd00a959890b98e2d9c3f942

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "146ca5fcb9c05101e12dd4bd6a11e94794a121c5876f1a985f86b27885e1f6d2",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2021-07-02T03:42:44Z",
    "title_canon_sha256": "41904a51325ef2ba82c40d566ce1cfcc28106388dd875806b1d5f42de732ed8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2107.00815",
    "kind": "arxiv",
    "version": 3
  }
}