Merge remote-tracking branch 'upstream/main' into s-cate

Author: SvenKlaassen

README.md

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+## Acknowledgements
+
+Funding by the Deutsche Forschungsgemeinschaft (DFG, German Research
+Foundation) is acknowledged – Project Number 431701914.
 
 ## References
 
+Bach, P., Chernozhukov, V., Kurz, M. S., and Spindler, M. (2022), DoubleML - An
+Object-Oriented Implementation of Double Machine Learning in Python,
+Journal of Machine Learning Research, 23(53): 1-6,
+[https://www.jmlr.org/papers/v23/21-0862.html](https://www.jmlr.org/papers/v23/21-0862.html).
+
 Chernozhukov, V., Chetverikov, D., Demirer, M., Duflo, E., Hansen, C., Newey, W. and Robins, J. (2018),
 Double/debiased machine learning for treatment and structural parameters. The Econometrics Journal, 21: C1-C68. doi:[10.1111/ectj.12097](https://doi.org/10.1111/ectj.12097).