Statistics New Zealand Working Paper No 10–01
Sonja Dekker and John Bryant
We document trends in age-sex-specific offence and apprehension rates for violent crime in New Zealand, and estimate the impact of population change on offence rates and justice sector expenditure for violent crime.
The main data source is New Zealand Police data on recorded offences and apprehensions for violent crime between 1994 and 2008. These data are combined with Statistics New Zealand population data, and published estimates of government expenditure per offence. The impact of population change is assessed using demographic decompositions. Complex visualisations of the data allow trends and impact to be examined.
The age-sex profile of violent offending in New Zealand has been changing, with the largest growth rates occurring at age 30 years and over, and among women. Changes in population age-sex structure have moderated increases in violent offence rates since 1994. Prospective changes in age-sex structure should moderate future growth in offence rates and justice sector expenditure.
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Dekker, S, & Bryant, J (2010). Ageing and violent crime in New Zealand (Statistics New Zealand Working Paper No 10–01). Available from www.stats.govt.nz.
ISBN 978-0-478-35311-2 (online)
ISSN 1179-934X (online)
Published 27 September 2010