Duration of the time to reconviction: Evidence from UK prisoner discharge data

Duration models were used to investigate reconviction risks for a sample of 34,126 offenders released from prison in England and Wales during 1998. Different versions of the Cox proportional hazards model were applied to a comprehensive data set covering several offense types. Factors such as age (modelled using bands rather than a linear or quadratic format), gender, convictions-history, and offense type were found to be strongly associated with the risk of reconviction. Interactions between factors were also included and it was shown that the discrepancy between the risk of reconviction for males and females became weaker as the number of previous convictions increased. The study helped identify the subgroups of offenders for whom reconviction risks are greatest and the times when they seem to be most vulnerable to reconviction. Implications are explored for the design of prisoner resettlement programs and the prioritization of offenders for more intensive forms of intervention.     

Human Rights and Modern Liberalism: a Critique

The idea of human rights has become one of the central moral notions of both the theory and practice of international politics. While its foundation and future in the practice of politics looks bright, it is an idea that still causes great trouble at the theoretical level. What are human rights? Why do we have them? To what should we attribute the authority of their moral claims? The theorist Michael Freeman has suggested one theory that by addressing such questions may serve as a foundation for human rights. His theory, however, ends by begging the questions it set out to answer.     

Spatial variation of refractive index in a pane of float glass.

In the statistical interpretation of forensic glass evidence it is standard practice to make the assumption of homogeneity of the refractive index (RI) of the source glass, or of localized homogeneity. However, the work of Locke and Hayes showed that, for toughened windscreen glass, this assumption might not be true. This work is well cited, but there appears to have been little follow-on published research. Furthermore, the toughening process is something known to affect the refractive index, and is a process that float glass does not undergo. Float glass is a major component of casework in New Zealand and for that reason it would be interesting to know whether the findings of Locke and Hayes apply when dealing with float glass. In this paper we describe an experiment similar to that of Locke and Hayes, systematically examining the variation of RI in a pane of float window glass. It was found that, although there were no systematic differences in refractive index, there were observable differences across the pane.