Readme file
SERIES C
 Applied Statistics
The effectiveness of risk scores: the logit rank plot, by J. Copas,
Journal of the Royal Statistical Society, Series C,
Applied Statistics, Volume 48 (1999)
Two files relating to this paper are
1. File "lrp.prg". This is a listing of three S-Plus functions used in the
numerical examples, exactly as given in APPENDIX A of the paper.
2. File "lrp.dat". This is a data file relating to the criminological study
used in Section 1 and Section 4.1 of the paper. This file consists of 1179 cases (rows)
and 6 variables (columns). These variables are
1) case identifier
2) the outcome indicator, 1 if the subject had a reconviction in two years and 0
otherwise
3) the ROR score
4) the point score
5) the logistic regression score
6) the offence score. The risk scores 3) to 6) are defined in Section 4.1 of the paper.
Full details of the data and context can be found in Home Office Research Study Number
150, listed in the references to the paper.
J. B. Copas
Department of Statistics
University of Warwick
Coventry, CV4 7AL
UK e-mail: jbc@stats.warwick.ac.uk
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