There's ok data. Take a look at this paper https://mason.gmu.edu/~atabarro/BriggsTabarrokFirearmsSuicide.pdf https://mason.gmu.edu/~atabarro/BriggsTabarrokFire

There's ok data. Take a look at this paper https://mason.gmu.edu/~atabarro/BriggsTabarrokFirearmsSuicide.pdf https://mason.gmu.edu/~atabarro/BriggsTabarrokFirearmsSuicid... and this page from our world in data https://ourworldindata.org/suicide#gun-prevalence https://ourworldindata.org/suicide#gun-prevalence Also of interest to me is how regulating alcohol and other drug use influences suicide. Because of the failures of the war on drugs and prohibition, this doesn't seem to be a very popular topic of study, but I reckon that making alcohol harder to get would decrease the number of suicides.