Pith Number

pith:JQNV7QSP

pith:2015:JQNV7QSPLZ3VTMLSIRI5K3EULI

not attested not anchored not stored refs pending

Evaluating the Causal Effect of University Grants on Student Dropout: Evidence from a Regression Discontinuity Design Using Principal Stratification

Alessandra Mattei, Fabrizia Mealli, Fan Li

arxiv:1507.04199 v1 · 2015-07-15 · 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{JQNV7QSPLZ3VTMLSIRI5K3EULI}

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	2026-05-18T01:36:48.890852Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c1b5fc24f5e7759b1724451d56c945a3bf34d2e84389394971b2f2b63ad186f

Aliases

arxiv: 1507.04199 · arxiv_version: 1507.04199v1 · doi: 10.48550/arxiv.1507.04199 · pith_short_12: JQNV7QSPLZ3V · pith_short_16: JQNV7QSPLZ3VTMLS · pith_short_8: JQNV7QSP

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/JQNV7QSPLZ3VTMLSIRI5K3EULI \
  | 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: 4c1b5fc24f5e7759b1724451d56c945a3bf34d2e84389394971b2f2b63ad186f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "19b2a370f44648eb527901180862a320e9b66bb223395d364c0c795513c18004",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2015-07-15T13:06:49Z",
    "title_canon_sha256": "2f1e2fabe1f029cfc83de0e2570ed4f7b530e5f03dc099a0f2caa210772d5299"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.04199",
    "kind": "arxiv",
    "version": 1
  }
}