Pith Number

pith:3JZYOVBO

pith:2015:3JZYOVBOAUMNVB3E3S6QGDHASY

not attested not anchored not stored refs pending

Isolation in the construction of natural experiments

Dylan S. Small, Jos\'e R. Zubizarreta, Paul R. Rosenbaum

arxiv:1501.04392 v1 · 2015-01-19 · 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{3JZYOVBOAUMNVB3E3S6QGDHASY}

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	2026-05-18T02:29:09.137578Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da7387542e0518da8764dcbd030ce0963580dcdb0559b2a146fd70852f295f73

Aliases

arxiv: 1501.04392 · arxiv_version: 1501.04392v1 · doi: 10.48550/arxiv.1501.04392 · pith_short_12: 3JZYOVBOAUMN · pith_short_16: 3JZYOVBOAUMNVB3E · pith_short_8: 3JZYOVBO

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/3JZYOVBOAUMNVB3E3S6QGDHASY \
  | 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: da7387542e0518da8764dcbd030ce0963580dcdb0559b2a146fd70852f295f73

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be08db38b85140d0bb8e2d649fe27cf72f855ca52680f2d4010dc060fe110380",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2015-01-19T05:52:50Z",
    "title_canon_sha256": "8d0f3554997e45402f1aff72c5aa293b1f172da601a36b024b59b5b4a619111a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.04392",
    "kind": "arxiv",
    "version": 1
  }
}