Pith Number

pith:ACOOWYKO

pith:2026:ACOOWYKOJX63NKKTKOS4MFX64M

not attested not anchored not stored refs pending

An economic geography dataset of U.S. skill specialization, relatedness, and complexity

Anthony Howell, Evan Johnson, Lauren Lanahan, Maryann Feldman, Nikhil Kalathil

arxiv:2606.09918 v1 · 2026-06-06 · econ.GN · q-fin.EC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ACOOWYKOJX63NKKTKOS4MFX64M}

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	2026-06-10T00:08:32.963563Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

009ceb614e4dfdb6a95353a5c616fee30d8751798d1c99d7207fe100c02cb808

Aliases

arxiv: 2606.09918 · arxiv_version: 2606.09918v1 · doi: 10.48550/arxiv.2606.09918 · pith_short_12: ACOOWYKOJX63 · pith_short_16: ACOOWYKOJX63NKKT · pith_short_8: ACOOWYKO

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/ACOOWYKOJX63NKKTKOS4MFX64M \
  | 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: 009ceb614e4dfdb6a95353a5c616fee30d8751798d1c99d7207fe100c02cb808

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f74418ce1f860e76e1c91e768fd95035fba9a067e88a6de780696bbf24bfb995",
    "cross_cats_sorted": [
      "q-fin.EC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "econ.GN",
    "submitted_at": "2026-06-06T17:06:42Z",
    "title_canon_sha256": "f7a0337015bef360d407d39656edc07ae662c80b403314f566f6b3be68cf8aad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.09918",
    "kind": "arxiv",
    "version": 1
  }
}