Pith Number

pith:P7CNQ7TW

pith:2026:P7CNQ7TWYBX5VXN3LJNUMBAH3U

not attested not anchored not stored refs pending

A Causal Framework for Estimating Heterogeneous Effects of On-Demand Tutoring

Bibi Groot, Danielle R Thomas, Digory Smith, Justin Reich, Kirk Vanacore, Rene Kizilcec

arxiv:2602.19296 v2 · 2026-02-22 · cs.HC · 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{P7CNQ7TWYBX5VXN3LJNUMBAH3U}

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	2026-06-01T01:02:35.285982Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fc4d87e76c06fdaddbb5a5b460407dd04408ccc139ee69537fda04f6f74d8db

Aliases

arxiv: 2602.19296 · arxiv_version: 2602.19296v2 · doi: 10.48550/arxiv.2602.19296 · pith_short_12: P7CNQ7TWYBX5 · pith_short_16: P7CNQ7TWYBX5VXN3 · pith_short_8: P7CNQ7TW

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/P7CNQ7TWYBX5VXN3LJNUMBAH3U \
  | 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: 7fc4d87e76c06fdaddbb5a5b460407dd04408ccc139ee69537fda04f6f74d8db

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "af4cd1c130a131f3ded703534ee4562d62bf027ab06d1fd97998c4cbbb33dbb0",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.HC",
    "submitted_at": "2026-02-22T18:10:36Z",
    "title_canon_sha256": "10fc636e540f27f308b46ad1879777aae890d4ac7ed4620dec63055acfe2d00f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2602.19296",
    "kind": "arxiv",
    "version": 2
  }
}