Your example doesn't seem to support your hypothesis.
First, Chicago doesn't have the most stringent gun laws. It actually has ridiculously lenient penalties for illegal gun possession.
Second [[and much more important) it's surrounded by jurisdictions with extremely lenient gun laws. Indiana is an absolute joke.
Obviously highly localized gun laws have little effect, because you can just go to the neighboring jurisdiction. But there's a ton of research on the matter, and gun laws do affect gun scarcity, even for the "bad guys". "Good guys" and "bad guys" are both subject to basic economic principles.
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