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Measuring input-specific technical inefficiency in European railways : a panel data approach
Christopulos, Dēmētrēs K.; Loizides, Ioannis; … - In: International journal of transport economics : IJTE 27 (2000) 2, pp. 147-171
Persistent link: https://www.econbiz.de/10001497901
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Efficiency in European railways : not as inefficient as one might think
Christopulos, Dēmētrēs K.; Loizides, Ioannis; … - In: Journal of applied economics 4 (2001) 1, pp. 63-88
Persistent link: https://www.econbiz.de/10001596984