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Large infrastructure projects are, as several international studies show (e.g. Wachs 1990, Flyvbjerg et al. 2005), often miscalculated. The same has been shown in a country like Norway (e.g. Odeck 2004, Strand 2004, Osland et al 2007), which has a long tradition for transport planning as well as key role of macro-economics in the planning system. The wrong estimates often imply underestimations of...
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