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Another look at the american electrical utility data
Ritter, Christian - 1994
Persistent link: https://www.econbiz.de/10000885638
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Profile methods
Ritter, Christian - 1993
Persistent link: https://www.econbiz.de/10000879380
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Pitfalls of normal-gamma stochastic frontier models
Ritter, Christian - In: Journal of productivity analysis 8 (1997) 2, pp. 167-182
Persistent link: https://www.econbiz.de/10001222790