From 90d8428eeafbcc3cecabe7f5a7311bd8d2e9434a Mon Sep 17 00:00:00 2001
From: igerber <isaac.gerber@gmail.com>
Date: Sun, 25 Jan 2026 06:51:32 -0500
Subject: [PATCH] Bump version to 2.1.7

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 CHANGELOG.md          | 13 +++++++++++++
 diff_diff/__init__.py |  2 +-
 pyproject.toml        |  2 +-
 rust/Cargo.toml       |  2 +-
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 87e1b29..c4411fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,18 @@ 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).
 
+## [2.1.7] - 2026-01-25
+
+### Fixed
+- **`plot_event_study` reference period normalization behavior**
+  - Effects are now only normalized when `reference_period` is explicitly provided
+  - Auto-inferred reference periods only apply hollow marker styling (no normalization)
+  - Reference period SE is set to NaN during normalization (constraint, not estimate)
+  - Updated docstring to clarify explicit vs auto-inferred behavior
+
+### Changed
+- Refactored visualization tests to reuse `cs_results` fixture for better performance
+
 ## [2.1.6] - 2026-01-24
 
 ### Added
@@ -530,6 +542,7 @@ 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
 
+[2.1.7]: https://github.com/igerber/diff-diff/compare/v2.1.6...v2.1.7
 [2.1.6]: https://github.com/igerber/diff-diff/compare/v2.1.5...v2.1.6
 [2.1.5]: https://github.com/igerber/diff-diff/compare/v2.1.4...v2.1.5
 [2.1.4]: https://github.com/igerber/diff-diff/compare/v2.1.3...v2.1.4
diff --git a/diff_diff/__init__.py b/diff_diff/__init__.py
index e32c1d7..c0d728c 100644
--- a/diff_diff/__init__.py
+++ b/diff_diff/__init__.py
@@ -136,7 +136,7 @@
     load_mpdta,
 )
 
-__version__ = "2.1.6"
+__version__ = "2.1.7"
 __all__ = [
     # Estimators
     "DifferenceInDifferences",
diff --git a/pyproject.toml b/pyproject.toml
index d76002c..4f0b938 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "maturin"
 
 [project]
 name = "diff-diff"
-version = "2.1.6"
+version = "2.1.7"
 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 eed07f0..d34b02e 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "diff_diff_rust"
-version = "2.1.6"
+version = "2.1.7"
 edition = "2021"
 description = "Rust backend for diff-diff DiD library"
 license = "MIT"