[Mark] Hoekstra [an economist with Texas A&M University] recently decided to analyze national crime statistics to see what happens in states that pass stand your ground laws. He found the laws are having a measurable effect on the homicide rate.
“Our study finds that, that homicides go up by 7 to 9 percent in states that pass the laws, relative to states that didn’t pass the laws over the same time period,” he says.
As to whether the laws reduce crime — by creating a deterrence for criminals — he says, “we find no evidence of any deterrence effect over that same time period.”
Hoekstra obtained this result by comparing the homicide rate in states before and after they passed the laws. He also compared states with the laws to states without the laws.