Pith Number

pith:YK6U2MKF

pith:2019:YK6U2MKFLZNUDPEE7CS3TCGWVE

not attested not anchored not stored refs pending

Shrinkage for Categorical Regressors

Jana Mareckova, Phillip Heiler

arxiv:1901.01898 v1 · 2019-01-07 · 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{YK6U2MKFLZNUDPEE7CS3TCGWVE}

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	2026-05-17T23:56:49.402181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2bd4d31455e5b41bc84f8a5b988d6a93e084cf2aa57fd354e90e01260011eba

Aliases

arxiv: 1901.01898 · arxiv_version: 1901.01898v1 · doi: 10.48550/arxiv.1901.01898 · pith_short_12: YK6U2MKFLZNU · pith_short_16: YK6U2MKFLZNUDPEE · pith_short_8: YK6U2MKF

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/YK6U2MKFLZNUDPEE7CS3TCGWVE \
  | 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: c2bd4d31455e5b41bc84f8a5b988d6a93e084cf2aa57fd354e90e01260011eba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5f3c93527a4ac808b20e75a4e032ccafea418822319b3fe09f4c459bde4824cd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "econ.EM",
    "submitted_at": "2019-01-07T16:17:23Z",
    "title_canon_sha256": "90a7389932d009811c35e44456e47acb2ef7cdb20e08aff2725f3def2cc697b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.01898",
    "kind": "arxiv",
    "version": 1
  }
}