Dark Hellion wrote:That was the point I was trying to make. Since crime is not a simple behavior, we cannot just look at regions with different punishment schemes and try to draw conclusion from them, as the causation of the crime may be different across different regions. So the only way to test for deterrent effect would either be to find two groups of incredibly similar peoples with different punishment schemes (highly unlikely) or figure out a way to empirically test the psychological effect of deterrence on the motivations to commit crime (again unlikely).
Bullshit. We can do before/after studies, for example, since laws are not fixed across jurisdictions and time. If, hypothetically, a state changed a law and saw crime skyrocket or plummet, and then other states passed similar laws with the same effect, that would be very strong evidence that the law was influencing crime rates in some way.
This is why it is very hard to test empirically whether or not punishment deters crime. We cannot establish a control nor can we find a testable mechanism from which to infer results.
Just because causation can be difficult to measure does not mean that we should jump to critiquing the theoretical underpinnings of its proponents or detractors and form a conclusion based on that. Moreover, if you can identify other factors that affect the crime rate, it's very easy to correct for those in underlying data. It might be hard to identify
all factors that affect crime besides punishment, but that doesn't mean you can't get some of the big ones and then evaluate how much of the remaining variance in crime rate is explained by differences in punishment, or likelihood to be caught, as captured in your model.
So we really cannot say that it is a right-wing claim that is testable, it seems to be a matter of principal.
It's not. There have been lots and lots of studies on the correlation between punishment and crime. The elasticity of crime with respect to punishment is something on the order of -.10, for both felonies and misdemeanors, according to the body of literature that I've read about the subject.
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