New figures from hospital A&E units appear to reflect a marked and continuing decline in violent crime. A study by academics at the University of Cardiff shows that within the space of a decade, injuries from serious assaults have halved. Attacks that left victims in hospital fell by 12 per cent in the past year alone. What is going on? After all, the received wisdom was that crime would go up during a recession. But this was always wrong. Most violent crime is committed by young men towards other young men, usually after having had too much to drink. So, if they do not go out as often as they did because they have less money, they will have fewer fights and the hospitals will be quieter.