Pith Number

pith:POOWWGYB

pith:2014:POOWWGYBPVAJJGTERGTW7G7SJN

not attested not anchored not stored refs pending

Estimation of causal effects using instrumental variables with nonignorable missing covariates: Application to effect of type of delivery NICU on premature infants

Dylan S. Small, Fan Yang, Scott A. Lorch

arxiv:1404.2477 v1 · 2014-04-09 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{POOWWGYBPVAJJGTERGTW7G7SJN}

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	2026-05-18T02:54:31.412359Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b9d6b1b017d40949a6489a76f9bf24b625a4e99160145d839349a2fe5fe7932

Aliases

arxiv: 1404.2477 · arxiv_version: 1404.2477v1 · doi: 10.48550/arxiv.1404.2477 · pith_short_12: POOWWGYBPVAJ · pith_short_16: POOWWGYBPVAJJGTE · pith_short_8: POOWWGYB

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/POOWWGYBPVAJJGTERGTW7G7SJN \
  | 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: 7b9d6b1b017d40949a6489a76f9bf24b625a4e99160145d839349a2fe5fe7932

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7eea7bf25e3260b2a8803de8a3a3ee6d8f79639908bd2642a0674a18a1fdf911",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2014-04-09T13:21:47Z",
    "title_canon_sha256": "7781ea61ffaa2ff8a1c98c836169fa8d86598db23119dae4bff393ff1b6a7694"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.2477",
    "kind": "arxiv",
    "version": 1
  }
}