Peterborough Social Impact Bond Reduces Reoffending By 8.4%

Urban Farm DB summary

Published 7 August 2014, reporting results for the first cohort of 1,000 prisoners in the Peterborough Social Impact Bond: an 8.4 per cent fall in reconviction relative to the comparable national baseline. The figure was produced for the Ministry of Justice by independent assessor Professor Darrick Jolliffe with Qinetiq and the University of Leicester using propensity score matching, finding 142 reconvictions per 100 prisoners at Peterborough against 155 per 100 in the control group. Payment required a reduction of more than 7.5 per cent, so the project did not qualify at this stage; outcome payments were due to be decided in 2016.

Only numbers and their conditions are stored, as structured data — never the source's own sentences. Metric and condition names stay in English, as coded.

• 8.4 %↓ Decrease

  reconviction reduction(peterborough sib cohort 1)

  Socialn = 1,000Control: comparable national baseline; payment required more than 7.5 per cent

  region

  United Kingdom

  year

  2014

  method

  propensity score matching by the independent assessor for the Ministry of Justice

• 142 reconvictions_per_100↓ Decrease

  reconvictions per 100 prisoners(peterborough sib cohort 1)

  Socialn = 1,000Control: 155 reconvictions per 100 prisoners in the control group

  region

  United Kingdom

  year

  2014

  method

  independent assessment for the Ministry of Justice

Direction of conclusions

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• Policy and governanceMixedWith caveats