Changelog
=========

v0.1.0 (development)
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- Initial implementation of the HDDID estimator
- Support for polynomial, trigonometric, and B-spline basis functions
- Parametric and nonparametric inference (Eq. 4.1-4.3)
- Cross-fitting with optional parallelization (n_jobs)
- sklearn LASSO backend option
- Auto penalty selection (penalty_lambda="auto")
- DataFrame integration (HDDIDFit.from_dataframe)