Release v3.1.0

CHANGELOG.md

@@ -7,6 +7,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.1.0] - 2026-04-14
+
+### Added
+- **dCDH Phase 3: Complete feature set for `ChaisemartinDHaultfoeuille`** - three sub-releases completing the estimator:
+  - **Phase 3a** (PR #300): Placebo SE via multiplier bootstrap (resolves Phase 1 deferral), non-binary treatment support with crossing-cell detection and automatic cell dropping, R parity SE assertions tightened
+  - **Phase 3b** (PR #302): Covariate adjustment via `controls` parameter (OLS residualization, Design 2 per-period path for non-binary treatment), group-specific linear trends via `trends_linear=True` (absorbs group-specific slopes before DiD), R `DIDmultiplegtDYN` parity tests for covariates and trends
+  - **Phase 3c** (PR #303): HonestDiD sensitivity analysis integration - `honest_did()` method on results with automatic event-study-to-sensitivity bridge, support trimming for non-consecutive horizons, `l_vec` target specification, Delta-RM and Delta-SD smoothness bounds
+
+### Changed
+- ROADMAP.md updated: dCDH Phase 3 items marked shipped
+
 ## [3.0.2] - 2026-04-12
 
 ### Added
@@ -1278,6 +1289,7 @@ for the full feature history leading to this release.
 [2.1.2]: https://github.com/igerber/diff-diff/compare/v2.1.1...v2.1.2
 [2.1.1]: https://github.com/igerber/diff-diff/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/igerber/diff-diff/compare/v2.0.3...v2.1.0
+[3.1.0]: https://github.com/igerber/diff-diff/compare/v3.0.2...v3.1.0
 [3.0.2]: https://github.com/igerber/diff-diff/compare/v3.0.1...v3.0.2
 [2.0.3]: https://github.com/igerber/diff-diff/compare/v2.0.2...v2.0.3
 [2.0.2]: https://github.com/igerber/diff-diff/compare/v2.0.1...v2.0.2

CITATION.cff

@@ -7,8 +7,8 @@ authors:
     family-names: Gerber
     orcid: "https://orcid.org/0009-0009-3275-5591"
 license: MIT
-version: "3.0.2"
-date-released: "2026-04-12"
+version: "3.1.0"
+date-released: "2026-04-14"
 url: "https://github.com/igerber/diff-diff"
 repository-code: "https://github.com/igerber/diff-diff"
 keywords:

diff_diff/__init__.py

@@ -228,7 +228,7 @@
 ETWFE = WooldridgeDiD
 DCDH = ChaisemartinDHaultfoeuille
 
-__version__ = "3.0.2"
+__version__ = "3.1.0"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",

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: 3.0.2
+- Version: 3.1.0
 - Repository: https://github.com/igerber/diff-diff
 - License: MIT
 - Dependencies: numpy, pandas, scipy (no statsmodels dependency)

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "3.0.2"
+version = "3.1.0"
 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"

rust/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "3.0.2"
+version = "3.1.0"
 edition = "2021"
 rust-version = "1.84"
 description = "Rust backend for diff-diff DiD library"