Productive efficiency analysis with unobserved inputs: An application to endogenous automation in railway traffic management. - Laurens Cherchye; Bram De Rock; Dieter Saelens; Marijn Verschelde; Bart Roets (Eur. J. Oper. Res., 2024)

Nonparametric efficiency analysis with unobserved inputs in multi-output settings. - Dieter Saelens (J. Oper. Res. Soc., 2024)