urpose: This paper reviews 41 English-language studies that tested the hypothesis that higher gun prevalence
levels cause higher crime rates, especially higher homicide rates.
Methods: Each study was assessed as to whether it solved or reduced each of three critical methodological
problems: (1) whether a validated measure of gun prevalence was used, (2) whether the authors controlled
for more than a handful of possible confounding variables, and (3) whether the researchers used suitable causal
order procedures to deal with the possibility of crime rates affecting gun rates, instead of the reverse.
Results: Itwas found that most studies did notsolve any of these problems, and that research that dida better job
of addressing these problems was less likely to support the more-guns-cause-more crime hypothesis. Indeed,
none of the studies that solved all three problems supported the hypothesis.
Conclusions: Technically weak research mostly supports the hypothesis, while strong research does not. It must
be tentatively concluded that higher gun ownership rates do not cause higher crime rates, including homicide
rate
The Impact of Gun Ownership Rates on Crime Rates: A Methodological Review of the Evidence (PDF Download Available). Available from:
https://www.researchgate.net/public...Rates_A_Methodological_Review_of_the_Evidence [accessed Oct 3, 2017].