Pith Number

pith:YJKKFHF7

pith:2013:YJKKFHF7TRNV7E6PWUVKG4WXSW

not attested not anchored not stored refs pending

Stronger instruments via integer programming in an observational study of late preterm birth outcomes

Dylan S. Small, Jos\'e R. Zubizarreta, Neera K. Goyal, Paul R. Rosenbaum, Scott Lorch

arxiv:1304.4066 v1 · 2013-04-15 · 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{YJKKFHF7TRNV7E6PWUVKG4WXSW}

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	2026-05-18T03:27:55.523181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c254a29cbf9c5b5f93cfb52aa372d7959f82468d1ccd8535a698be66b21df4c3

Aliases

arxiv: 1304.4066 · arxiv_version: 1304.4066v1 · doi: 10.48550/arxiv.1304.4066 · pith_short_12: YJKKFHF7TRNV · pith_short_16: YJKKFHF7TRNV7E6P · pith_short_8: YJKKFHF7

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/YJKKFHF7TRNV7E6PWUVKG4WXSW \
  | 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: c254a29cbf9c5b5f93cfb52aa372d7959f82468d1ccd8535a698be66b21df4c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "faa4c0cbdf0241d0a6098dc1a1f17ba934261fff31b9298d9cd9498ba86502fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2013-04-15T12:14:04Z",
    "title_canon_sha256": "77c1c9c960a353697971bdfba789beacae9ef0f176b6729e6ff0f08f3b0347f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.4066",
    "kind": "arxiv",
    "version": 1
  }
}