People do look at these sorts of numbers all the time, and most of the evidence points to lower overall suicide rates in places that have stricter gun control. Of course, it is hard to fully control for all the correlations, but the available evidence does point towards fewer guns == fewer suicides.

The general explanation is that many suicides are somewhat spur of the moment, and access to an easy way to kill yourself when you have those moments of weakness increases the chance that a person will follow through. People have this sense that suicides are well thought out decisions that people make when they conclude that their life isn't worth living anymore, but that isn't the case most of the time.

https://www.rand.org/research/gun-policy/analysis/supplement...

https://www.reuters.com/article/us-health-firearms-suicides/...

Thanks for the links. The RAND paper is really good; the Reuters article less so. While your summary seems true, I think a better summary might be "despite many studies, none have found evidence for a full substitution effect". That is, in studies that show a drop in firearm suicides, there is almost always a drop in overall suicide rates as well. The degree to which changing from an existing lax gun control regime to a stricter one results in a lower firearm suicide rate is harder to establish, but in at least some cases for some populations it's probably a positive effect.

My understanding is that it's generally accepted among people researching these things that means restriction (like gun control) does reduce overall suicide rates, it doesn't just make people pick a different method of suicide.

From a quick google search https://www.ncbi.nlm.nih.gov/pubmed/22726520

> Although some individuals might seek other methods, many do not; when they do, the means chosen are less lethal and are associated with fewer deaths than when more dangerous ones are available.

There is a relationship between gun control and suicides: http://brady-score.github.io/

Doesn't mean it's causal, maybe there are confounding factors, but the relationship itself does exists.

With that said, if people are committing suicides I think it's better to look at why they are committing suicides, and then fix that.