From aa0510c57058d84009f734eff7e6c8c682dae8e4 Mon Sep 17 00:00:00 2001
From: igerber <isaac.gerber@gmail.com>
Date: Thu, 19 Feb 2026 17:36:56 -0500
Subject: [PATCH] Bump version to 2.5.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 CHANGELOG.md          | 17 +++++++++++++++++
 diff_diff/__init__.py |  2 +-
 pyproject.toml        |  2 +-
 rust/Cargo.toml       |  2 +-
 4 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5aab1f..f38002f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.5.0] - 2026-02-19
+
+### Added
+- Stacked DiD estimator (`StackedDiD`) implementing Wing, Freedman & Hollingsworth (2024)
+  with corrective Q-weights for compositional balance across event times
+- Sub-experiment construction per adoption cohort with clean (never-yet-treated) controls
+- IC1/IC2 trimming for compositional balance across event times
+- Q-weights for aggregate, population, or sample share estimands (Table 1)
+- WLS event study regression via sqrt(w) transformation
+- `stacked_did()` convenience function
+- R benchmark scripts for Stacked DiD validation (`benchmarks/R/benchmark_stacked_did.R`)
+- Comprehensive test suite for Stacked DiD (`tests/test_stacked_did.py`)
+
+### Fixed
+- NaN inference handling in pure Python mode for edge cases
+
 ## [2.4.3] - 2026-02-19
 
 ### Changed
@@ -792,6 +808,7 @@ 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
 
+[2.5.0]: https://github.com/igerber/diff-diff/compare/v2.4.3...v2.5.0
 [2.4.3]: https://github.com/igerber/diff-diff/compare/v2.4.2...v2.4.3
 [2.4.2]: https://github.com/igerber/diff-diff/compare/v2.4.1...v2.4.2
 [2.4.1]: https://github.com/igerber/diff-diff/compare/v2.4.0...v2.4.1
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index 29fdd25..39545fd 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -153,7 +153,7 @@
     load_mpdta,
 )
 
-__version__ = "2.4.3"
+__version__ = "2.5.0"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/pyproject.toml b/pyproject.toml
index ec450cb..1a1ec6b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "2.4.3"
+version = "2.5.0"
 description = "A library for Difference-in-Differences causal inference analysis"
 readme = "README.md"
 license = "MIT"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 6ab6c0d..95a426d 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "2.4.3"
+version = "2.5.0"
 edition = "2021"
 description = "Rust backend for diff-diff DiD library"
 license = "MIT"