Pith Number

pith:E43OKITF

pith:2015:E43OKITF65YT52LYUIE5YHCQMJ

not attested not anchored not stored refs pending

Quantile regression for longitudinal data: unobserved heterogeneity and informative missingness

Marco Alfo', Maria Francesca Marino, Nikos Tzavidis

arxiv:1501.02157 v2 · 2015-01-09 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E43OKITF65YT52LYUIE5YHCQMJ}

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	2026-05-18T01:36:11.026797Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2736e52265f7713ee978a209dc1c50627358b17c6aa6f6de6343e649b4241867

Aliases

arxiv: 1501.02157 · arxiv_version: 1501.02157v2 · doi: 10.48550/arxiv.1501.02157 · pith_short_12: E43OKITF65YT · pith_short_16: E43OKITF65YT52LY · pith_short_8: E43OKITF

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/E43OKITF65YT52LYUIE5YHCQMJ \
  | 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: 2736e52265f7713ee978a209dc1c50627358b17c6aa6f6de6343e649b4241867

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "860f9d6dba76663b09316f83f14e326d805c7071ac73b56893a410bb32b81a7f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-01-09T14:38:31Z",
    "title_canon_sha256": "6eaf3e9061e653cb47337df958ddc6545ef24785ddf6b1ebd98a33f00af045f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.02157",
    "kind": "arxiv",
    "version": 2
  }
}