Treasury Guidance, 'Appraisal and Evaluation in Central Government' otherwise known as the 'Green Book' (second edition, published August 1997) recommends that the use of national loans fund (NLF) plus 2% as the figure for the nominal equivalent of the standard public sector discount rate of 6% should be discontinued. From now on a discount rate of 6% should be used as the standard discount rate for all investment appraisal decisions measuring the value of projected future costs or benefits.
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