Empirical Finance Lab: Audit-First Tools for Credible Empirical Finance Research
Year: 2026
Type: software
Abstract: Empirical Finance Lab v0.1.1 This governed patch release improves researcher-facing interoperability, provenance, citation, and discoverability while preserving the accepted scientific core. Highlights Deterministic support for YYYY-MM-DD, YYYY/MM/DD, and YYYYMMDD. Explicit researcher-controlled interpretation of ambiguous MM/DD/YYYY versus DD/MM/YYYY dates; EFL never guesses. Date canonicalization occurs before duplicate, ordering, and effective-trading-date checks. Original-file SHA-256, normalized engine-input SHA-256, source-row provenance, and date-parser provenance remain auditable. CRSP-shaped headers DlyCalDt, DlyRet, and vwretd receive mapping suggestions. Reproducibility-bundle release citation is derived from the authoritative software version. Added visible author/citation information, canonical/search metadata, Search Console verification metadata, and sitemap support. Added governed Stage X v0.1.1 patch-release validation. Scientific boundary This release does not change the accepted Stage IV econometric implementation. The Stage III validation corpus, Stage IV numerical core, and Stage VIII real-data validation evidence remain the scientific authority. The only modified file inside src/empirical_finance_lab/** relative to v0.1.0 is __init__.py, solely for governed software-version metadata. The general researcher-editable browser estimation-window default remains [-250,-30]. The Stage VIII real-CRSP validation design [-256,-46] remains evidence-specific and is not imposed as a universal default. Real-data validation EFL has been validated on five real CRSP event-study cases. Independent recomputation outside the EFL production core matched EFL within machine precision, with identical permutation extreme counts across all five tested cases. This is a tested-case numerical-parity result. It is not CRSP, WRDS, or vendor certification; it is not a universal validation claim; and it is not causal certification. Licensed CRSP observations are not distributed with this repository or release. Governed release identity Tag: v0.1.1 Exact release commit: 55bc447141dde59853e670687bf46e383679eb78 Historical v0.1.0 release remains immutable at: faf3dc6c5702dad3f5abd1dd15f7697fab5a5831 Archival DOI A version-specific DOI will be cited only after an archival DOI is actually minted and verified. No DOI is claimed in this release text before that occurs.
Author: Hasan, Muhammad Kamrul
Language: English
Subfield: Finance
Domain: Social Sciences
Open Access status: green
OpenAlex ID: W7203786236