Jack is passionate about using evidence to improve policymaking and to improve public services, and is interested in how best to overcome the challenges of evaluating interventions and policies, and to promote the use of evidence in policymaking.

Jack works primarily on reviews of evidence, and has been heavily involved in launching and maintaining the EIF Guidebook since its inception in 2014, leading on recent work to expand the number of programmes that EIF has described and rated according to the strength of their evidence.