Bump version to 2.8.2

igerber · claude · igerber · commit a2193cd82e9e · 2026-04-02T08:20:10.000-04:00
Adds CHANGELOG entry covering EPV diagnostics for propensity score logit,
safer fallback defaults, and survey-weighted propensity fixes.

Co-Authored-By: Claude Opus 4.6 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -7,6 +7,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [2.8.2] - 2026-04-02
+
+### Added
+- **EPV diagnostics for propensity score logit** — events-per-variable (EPV) checks with Peduzzi convention (predictors excluding intercept) for CallawaySantAnna IPW/DR, TripleDifference IPW/DR, and StaggeredTripleDifference
+- `diagnose_propensity()` method on CS/TripleDiff/StaggeredDDD results for post-fit propensity score assessment
+- EPV summary block in TripleDifference `summary()` output
+- `logit_strict` parameter for propensity score estimation — warns on low EPV (default) or raises error (`strict=True`)
+
+### Changed
+- Default propensity score fallback behavior: safer defaults with method-specific warning messages
+- EPV denominator uses predictor count excluding intercept (Peduzzi et al. 1996 convention)
+
+### Fixed
+- Fix TripleDifference survey-weighted fallback propensity score
+- Fix NaN cache poisoning in propensity score estimation
+- Fix `epv_summary` column schema on empty results
+- Fix SDDD EPV: use min-EPV across comparison cohorts with cache diagnostic propagation
+- Fix `diagnose_propensity` `np.inf` handling
+
 ## [2.8.1] - 2026-04-01
 
 ### Added
@@ -1065,6 +1084,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - `to_dict()` and `to_dataframe()` export methods
   - `is_significant` and `significance_stars` properties
 
+[2.8.2]: https://github.com/igerber/diff-diff/compare/v2.8.1...v2.8.2
 [2.8.1]: https://github.com/igerber/diff-diff/compare/v2.8.0...v2.8.1
 [2.8.0]: https://github.com/igerber/diff-diff/compare/v2.7.6...v2.8.0
 [2.7.6]: https://github.com/igerber/diff-diff/compare/v2.7.5...v2.7.6
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
@@ -210,7 +210,7 @@
 Bacon = BaconDecomposition
 EDiD = EfficientDiD
 
-__version__ = "2.8.1"
+__version__ = "2.8.2"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/docs/llms-full.txt b/docs/llms-full.txt
@@ -2,7 +2,7 @@
 
 > A Python library for Difference-in-Differences causal inference analysis. Provides sklearn-like estimators with statsmodels-style output for econometric analysis.
 
-- Version: 2.8.1
+- Version: 2.8.2
 - Repository: https://github.com/igerber/diff-diff
 - License: MIT
 - Dependencies: numpy, pandas, scipy (no statsmodels dependency)
diff --git a/pyproject.toml b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "2.8.1"
+version = "2.8.2"
 description = "Difference-in-Differences causal inference with sklearn-like API. Callaway-Sant'Anna, Synthetic DiD, Honest DiD, event studies, parallel trends."
 readme = "README.md"
 license = "MIT"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "2.8.1"
+version = "2.8.2"
 edition = "2021"
 description = "Rust backend for diff-diff DiD library"
 license = "MIT"
