Education
the paper established a causal link between education and crime by looking at the crime rates of school-leavers that were forced to stay on an extra year in British schools because of a legal change to the school-leaving age. This group was less likely to engage in criminal behaviour than the previous year cohort. The paper estimates that the cost of a year's extra schooling is outweighed by the benefits in terms of less crime - writes John O'Sullivan.

you can acquire this image as a ›Counted Edition, in fact - every school should have one, with specific data embedded - don't you think ?