This study explored predictors of credit card debt and foreclosure rates in the states of the USA, based on the average personality scores of the residents of the states obtained from an Internet questionnaire completed by 619 397 residents (Rentfrow <italic>et al.,</italic> 2008). It was found that states whose...

Cloninger (1992) applied the portfolio approach to criminal behaviour and illustrated the deterrent effect of capital punishment by use of data from 1983-1988 across the states of America and the District of Columbia. This comment suggests two possible flaws in Cloninger's analyses, which, if...