Add real-world data examples to documentation #68
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- Add diff_diff/datasets.py module with functions to load classic econometric datasets for DiD analysis: - load_card_krueger(): Card & Krueger (1994) minimum wage study - load_castle_doctrine(): Castle Doctrine / Stand Your Ground laws - load_divorce_laws(): Unilateral divorce laws (Stevenson-Wolfers) - load_mpdta(): Minimum wage panel data from R did package - list_datasets(): List available datasets with descriptions - load_dataset(): Load dataset by name - clear_cache(): Clear locally cached datasets - Add docs/tutorials/09_real_world_examples.ipynb with comprehensive examples demonstrating: - Classic 2x2 DiD with Card-Krueger data - Staggered adoption with Castle Doctrine data - Long panel staggered DiD with divorce laws data - TWFE bias and Bacon decomposition - Callaway-Sant'Anna and Sun-Abraham estimators - Event study visualizations - Add tests/test_datasets.py with 22 tests covering: - Dataset structure validation - Fallback data generation - Integration with DiD estimators - Update __init__.py to export dataset functions - Update CLAUDE.md and TODO.md documentation
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- Remove unused imports (hashlib, os, Optional) from datasets.py - Clear notebook outputs for cleaner version control - Improve seed comments for better clarity on reproducibility
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Add diff_diff/datasets.py module with functions to load classic econometric datasets for DiD analysis:
Add docs/tutorials/09_real_world_examples.ipynb with comprehensive examples demonstrating:
Add tests/test_datasets.py with 22 tests covering:
Update init.py to export dataset functions
Update CLAUDE.md and TODO.md documentation