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...Ifo institute leibniz for economic research at the university of munich estimating economies scale and scope with flexible technology thomas p triebs david s saal pablo arocena subal c kumbhakar working paper no october an electronic version may be downloaded from website www cesifo group de abstract are typically modelled estimated using cost functions that common to all firms in industry irrespective whether they specialize a single output or produce multiple outputs we suggest alternative model does not make this assumption show how it can standard parametric including translog is special case our testable econometrically application publicly owned us electric utilities sample find evidence vertical but results do support integrated specialized particular empirical restricting might result biased estimates jel code d l keywords integration function aston triangle b et poschingerstr birminghamton uk germany phone ac public navarre state new york business administration department bin...