Pith Number

pith:JIF2L5QO

pith:2020:JIF2L5QOSVWH3W6GLJ647AH4FI

not attested not anchored not stored refs pending

Is being an only child harmful to psychological health?: Evidence from an instrumental variable analysis of China's One-Child Policy

Fan Li, Peng Ding, Shuxi Zeng

arxiv:2005.09130 v2 · 2020-05-18 · stat.AP · econ.EM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JIF2L5QOSVWH3W6GLJ647AH4FI}

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	2026-07-05T01:09:30.424807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a0ba5f60e956c7ddbc65a7dcf80fc2a32b150a8dbea431e14696a40c8d2347e

Aliases

arxiv: 2005.09130 · arxiv_version: 2005.09130v2 · doi: 10.48550/arxiv.2005.09130 · pith_short_12: JIF2L5QOSVWH · pith_short_16: JIF2L5QOSVWH3W6G · pith_short_8: JIF2L5QO

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/JIF2L5QOSVWH3W6GLJ647AH4FI \
  | 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: 4a0ba5f60e956c7ddbc65a7dcf80fc2a32b150a8dbea431e14696a40c8d2347e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7dba55ec43bf234dd6d344e27c3a540cce4787377c16f0acc128739f18034518",
    "cross_cats_sorted": [
      "econ.EM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2020-05-18T23:13:29Z",
    "title_canon_sha256": "caa9ca765508bb274c6ff3936c0da14c1eba21167b584c140adbe47cf5830321"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2005.09130",
    "kind": "arxiv",
    "version": 2
  }
}