@article{JATRS-77F179283F5A9C63, title={{ANSPs in Turbulent Times - Uncovering the Impact of Demand Shocks on Efficiency Using the Malmquist Index}}, author={Thomas Standfuss and Frank Fichert and Georg Hirte and Hartmut Fricke}, journal={{Journal of the Air Transport Research Society}}, volume={1}, number={1}, pages={101-116}, pages={https://dx.doi.org/10.59521/77F179283F5A9C63}, year={2023}, publisher={ATRS} }