The academic study of crime is known as [[criminology]]. The preponderance of crime is measured as the [[crime rate]], and usually expressed as a ratio (13 homicides per 10000 people, for example). Different crimes can also be grouped into categories, such as violent crime. Informal categories include white-collar crime and victimless crime. | The academic study of crime is known as [[criminology]]. The preponderance of crime is measured as the [[crime rate]], and usually expressed as a ratio (13 homicides per 10000 people, for example). Different crimes can also be grouped into categories, such as violent crime. Informal categories include white-collar crime and victimless crime. |