Pith Number

pith:D6BJ4QDH

pith:2020:D6BJ4QDHWFKR3IPA5CA4M2FZTE

not attested not anchored not stored refs pending

Constructing a More Closely Matched Control Group in a Difference-in-Differences Analysis: Its Effect on History Interacting with Group Bias

Dylan S. Small, Pallavi Basu

arxiv:2009.06935 v1 · 2020-09-15 · stat.ME · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{D6BJ4QDHWFKR3IPA5CA4M2FZTE}

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	2026-07-05T01:35:39.375853Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f829e4067b1551da1e0e881c668b99910a72cf3fe744d611964755495d7e2ef

Aliases

arxiv: 2009.06935 · arxiv_version: 2009.06935v1 · doi: 10.48550/arxiv.2009.06935 · pith_short_12: D6BJ4QDHWFKR · pith_short_16: D6BJ4QDHWFKR3IPA · pith_short_8: D6BJ4QDH

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/D6BJ4QDHWFKR3IPA5CA4M2FZTE \
  | 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: 1f829e4067b1551da1e0e881c668b99910a72cf3fe744d611964755495d7e2ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "373d42454c1a68f2f4d6204a14c8dc5b4a30a56f132d062dd7cf81a7375fafee",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2020-09-15T09:08:31Z",
    "title_canon_sha256": "5a2ac37362130c73d5c01612b8c976b207dc194ef29e196074a96c6217c934dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2009.06935",
    "kind": "arxiv",
    "version": 1
  }
}