“POVERTY”, wrote Aristotle, “is the parent of crime.” But was he right? Certainly, poverty and crime are associated. And the idea that a lack of income might drive someone to misdeeds sounds plausible. But research by Amir Sariaslan of the Karolinska Institute, in Stockholm, and his colleagues, just published in the British Journal of Psychiatry, casts doubt on the chain of causation—at least as far as violent crime and the misuse of drugs are concerned.
Using the rich troves of personal data which Scandinavian governments collect about their citizens, Mr Sariaslan and his team were able to study more than half a million children born in Sweden between 1989 and 1993. The records they consulted contained information about these people’s educational attainments, annual family incomes and criminal convictions. They also enabled the researchers to identify everybody’s siblings.
In Sweden the age of criminal responsibility is 15, so Mr Sariaslan tracked his subjects from the dates of their 15th birthdays onwards, for an average of three-and-a-half years. He found, to no one’s surprise, that teenagers who had grown up in families whose earnings were among the bottom fifth were seven times more likely to be convicted of violent crimes, and twice as likely to be convicted of drug offences, as those whose family incomes were in the top fifth.