Better evidence for a better world

Campbell evidence and gap maps

Coming soon – Campbell EGMs are a new evidence synthesis product. Plain language summaries of our EGMs will be published on this website. The interactive EGMs and full EGM reports will be available in our journal on the Wiley Online Library platform: click here.

Learn more about Campbell EGMs

Other EGMs

Campbell has produced maps on other topics, sometimes in partnership with other organisations.

See our other EGMs
Search Result: 5 Records found


Policy brief 5: Effectiveness of focused policing strategies
  • Authors Ruth Pitt
  • Published date 2018-08-22
  • Coordinating group(s) Crime and Justice
  • Type of document Policy brief
  • English

    This Campbell policy brief summarises findings from systematic reviews on focused policing strategies, the consequences of geographically-focused policing for neighbouring areas, and community perceptions of police legitimacy.

Policy brief 4: The effects of sentencing policy on re-offending
Policy brief 1: Effects of parenting programmes
  • Authors Jane Barlow
  • Published date 2016-06-20
  • Type of document Policy brief
  • English

    Parenting programmes are provided to parents to enhance their knowledge, skills and understanding, and so improve both child and parent behavioural and psychological outcomes.

    These programmes are typically offered over eight to 12 weeks, for about one to two hours each week, although the range varies from as few as two sessions to as many as 20.

    Professor Barlow summarises evidence from six Campbell systematic reviews.

  • Spanish

    Efectos de programas de capacitación para padres: Una revisión de seis revisiones sistemáticas Campbell

Policy brief 2: Effects of school-based interventions to improve student behavior
  • Authors Gary Ritter
  • Published date 2016-06-20
  • Type of document Policy brief
Policy brief 3: Programs promoting sustainable agriculture for smallholders
  • Authors Hugh Waddington
  • Published date 2016-06-08
  • Type of document Policy brief
  • English

    This Campbell policy brief summarizes evidence from five systematic reviews in the Campbell Library which examine agricultural interventions including technology, skills and the regulatory environment. The impact of the following interventions is presented: land titling, training and technology, farmer field schools, payment for environmental services and decentralized forest management.

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