The Treasury Test Discount Rate (TDR) is a rate suggested by H.M. Treasury, and employed in cost-benefit analysis. It is an attempt to value the time preference of society. In 2003 the rate was revalued from 6% to 3.5%.
Further reading John Porter; Ron Bridle; Motorway Archive Trust (2002). The Motorway Achievement. Thomas Telford. pp. 17–18. ISBN 0-7277-3197-1.
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