Pith Number

pith:X2NFDD3M

pith:2025:X2NFDD3MOOZV2GTWXJBWBBB3TP

not attested not anchored not stored refs pending

Augmenting the availability of historical GDP per capita estimates through machine learning

C\'esar A. Hidalgo, Philipp Koch, Viktor Stojkoski

arxiv:2505.09399 v1 · 2025-05-14 · 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{X2NFDD3MOOZV2GTWXJBWBBB3TP}

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	2026-07-05T11:03:08.016196Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

be9a518f6c73b35d1a76ba4360843b9beeb78d9650bb359c0f802edf2166aabf

Aliases

arxiv: 2505.09399 · arxiv_version: 2505.09399v1 · doi: 10.48550/arxiv.2505.09399 · pith_short_12: X2NFDD3MOOZV · pith_short_16: X2NFDD3MOOZV2GTW · pith_short_8: X2NFDD3M

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/X2NFDD3MOOZV2GTWXJBWBBB3TP \
  | 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: be9a518f6c73b35d1a76ba4360843b9beeb78d9650bb359c0f802edf2166aabf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ca39a74779eb8f298275ff2bd80034ec68034338ddc802c31a540080ffa21c4",
    "cross_cats_sorted": [
      "q-fin.EC"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "econ.GN",
    "submitted_at": "2025-05-14T13:56:45Z",
    "title_canon_sha256": "99b599a450cd6d2b7f87a364678fe661aabbbb041e0d9d6ce6d383258535761a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.09399",
    "kind": "arxiv",
    "version": 1
  }
}