Therefore, that the textbook WACC yields correct valuations for either a single-period project or a project with level perpetual cash flows is a consequence, not of project life per se, as has been argued in the literature, but rather of maintaining indirectly a constant leverage ratio. Furthermore, the failure of the literature generally to produce correct valuations for uneven finite cash flows with the textbook approach is likewise not a matter of project life, but instead the result of assuming a debt transaction schedule that allows the leverage ratio to vary.