Fewer guns, fewer suicides. "[W]e studied the relationship between guns and suicide in the U.S. from 2000 to 2009. Using five measures of gun ownership and controlling for other factors associated with suicide, such as mental illness, we consistently found that each 1 percentage-point increase in household gun ownership rates leads to between 0.5 and 0.9 percent more suicides...Are the people not killing themselves with guns simply committing suicide by other means? Some are--but not all. While reduced household gun ownership did lead to more suicides by other means, suicides went down overall. That's because contrary to the "folk wisdom" that people who want to commit suicide will always find a way to get the job done, suicides are not inevitable. Suicides are often impulsive decisions, and guns require less forethought than other means of suicide--and they're also deadlier." Justin Briggs and Alex Tabarrok in Slate