Pith Number

pith:NSRAXHGT

pith:2014:NSRAXHGTKKBNY43SL26LYUROS2

not attested not anchored not stored refs pending

Exploiting TIMSS and PIRLS combined data: multivariate multilevel modelling of student achievement

Carla Rampichini, Fulvia Pennoni, Isabella Romeo, Leonardo Grilli

arxiv:1409.2642 v2 · 2014-09-09 · 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{NSRAXHGTKKBNY43SL26LYUROS2}

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	2026-05-18T01:35:16.484000Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ca20b9cd35282dc73725ebcbc522e96b5cfda0816069e83c14c41744a521f5e

Aliases

arxiv: 1409.2642 · arxiv_version: 1409.2642v2 · doi: 10.48550/arxiv.1409.2642 · pith_short_12: NSRAXHGTKKBN · pith_short_16: NSRAXHGTKKBNY43S · pith_short_8: NSRAXHGT

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/NSRAXHGTKKBNY43SL26LYUROS2 \
  | 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: 6ca20b9cd35282dc73725ebcbc522e96b5cfda0816069e83c14c41744a521f5e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2bb3acf3f6c131201f9c1a0d2c30efbaedbd04fb33b5f88399b64ed12e3471e0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2014-09-09T08:53:14Z",
    "title_canon_sha256": "7a88db57ee25fc72c095704499f951682ce004ac05bf359c36db664499d656e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.2642",
    "kind": "arxiv",
    "version": 2
  }
}