SJ Smith, A. & Ojeda Cabral, M. (2022). Is higher quality always costly? Marginal costs of quality: Theory and application to railway punctuality. https://doi.org/10.1016/j.tra.2022.01.007
SJ Smith, A. & Ojeda Cabral, M. (2022). Is higher quality always costly? Marginal costs of quality: Theory and application to railway punctuality. https://doi.org/10.1016/j.tra.2022.01.007