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HM Treasury

Economic data & tools

Green Book guidance

The Green Book sets out the core principles on which all public sector economic assessment is based. Supplementary guidance has been produced developing further how these principles should be applied in specific areas such as managing risks, optimism bias, competition, impact assessments and taxation in PFI and the public sector comparator. More detailed departmental guidance is also available, applying the Green Book to areas such as health, the environment, transport and the shadow price of carbon.

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Green Book