I predict less riots?

LSE academics have published a paper which purports to show that riot-type crime fell, er, after the riots ended. This is presented as being attributable to the deterrent effect of the very harsh sentencing approach adopted by judges at the time - and it is also interesting to note that the authors found a concomitant increase in other types of crime.So, is this deterrence in action or did people just get fed up with rioting? Were the likely perpetrators imprisoned anyway? Good debate material for deterrence and the aims of sentencing generally.