Pith Number

pith:TVKFARNA

pith:2026:TVKFARNAELSFUCMEAP3C2PWIOL

not attested not anchored not stored refs pending

Semiparametric Difference-in-Differences Estimation With Missing Not at Random Data: A Shadow Variable Approach

Dongyuan Mu, Junjie Li

arxiv:2606.08474 v1 · 2026-06-07 · 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{TVKFARNAELSFUCMEAP3C2PWIOL}

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	2026-06-09T01:05:37.652269Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d545045a022e45a098403f62d3ec872d290a7e0587b8a8703e699b280960775

Aliases

arxiv: 2606.08474 · arxiv_version: 2606.08474v1 · doi: 10.48550/arxiv.2606.08474 · pith_short_12: TVKFARNAELSF · pith_short_16: TVKFARNAELSFUCME · pith_short_8: TVKFARNA

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/TVKFARNAELSFUCMEAP3C2PWIOL \
  | 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: 9d545045a022e45a098403f62d3ec872d290a7e0587b8a8703e699b280960775

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1c1948ce07427497d7287d0562b967a7d6e59a926c95420c8f9be7078e9d0e30",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "econ.EM",
    "submitted_at": "2026-06-07T06:42:34Z",
    "title_canon_sha256": "36e980573c09c32ce400e773e991d25040f9a305ab37d0cf138a90a33e3288e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.08474",
    "kind": "arxiv",
    "version": 1
  }
}