It seems obvious right? The higher the concentration of guns in a given population, the higher will be the rates of suicide using a gun, murders by gun and accidental gun deaths. The largest study of gun violence ever has found the obvious.
“…for each 1 percentage point increase in proportion of household gun ownership,” Siegel et al. found, “firearm homicide rate increased by 0.9″ percent. A one standard deviation change in firearm ownership shifted gun murders by a staggering 12.9 percent.” -Zach Beauchamp, Nation of Change