Contract killings generally make up a small percentage of murders. For example, they accounted for about 6% of all murders in
Scotland from 1993 to 2002. A study by the
Australian Institute of Criminology of 162 contract murders and attempted contract murders in Australia between 1989 and 2002 indicated that the most common reason for murder-for-hire was
insurance policy payouts. The study also found that payments varied from $5,000 to $30,000 per killing, with an average of $15,000, and that the most commonly used weapons were
firearms. Contract killings accounted for 2% of murders in Australia during that period. Contract killers may share similarities with
serial killers, such as detached financial and emotional incentives, but are not classified as such due to the differing objectives of their crimes. Nevertheless, there are occasionally individuals that are labelled as both contract killers and serial killers. == See also ==