Joint Review: D.L. MacKenzie What Works in Corrections: Reducing the Criminal Activities of Offenders and Delinquents Cambridge: Cambridge University Press, 2006,  45.00 hbk (ISBN: 9-780521-806459), xi+391 pp. S. Bushway, M.A. Stoll and D.F. Weiman (eds) Barriers to Re-entry? The Labour Market for Released Prisoners in Post-industrial America New York: Russell Sage Foundation, 2006,  37.50 hbk (ISBN: 978-0-87154-087-4), xii+336 pp