The new edition of the Cochrane Handbook for Systematic Reviews of Interventions (Version 6) has been launched and is freely available via the Cochrane website.
Chapter 20 of the new version of the Handbook contains guidance on incorporating economic evidence into Cochrane Reviews, including sections on the formulation of the review, as well as identification, appraisal and synthesis and interpretation of the evidence.
Chapter 20: Economic evidence is freely available on the Cochrane website.