"Crime clearly can and does fund drug use, but understanding the relationship between problematic drug use and acquisitive crime using an economically focused cause-and-effect model does not account for the complexities of the relationship (yet alone any broader category of drug-related crime).
Our data, taken as a whole, support a common aetiology approach to understanding the relationship rather than any simpler uni- or bidirectional causation. The data show examples of crime and drug use being related to peer-group influences, to economic pressures, or to a wider deviant lifestyle...
The idea that psychological needs or personality traits may underscore both deviant behaviours further demonstrates the strength of common aetiology approaches to the drug-crime-link over simpler cause- and effect models ..."