Mass shootings account for only 0.3% of all gun deaths in the US, but they evoke a significantly larger policy response than regular gun-related fatalities. A trio of researchers from the Harvard Business School found that the number of firearm bills introduced in a state jumps 15% in the year after a mass shooting, with the per-death impact of mass shootings on bills introduced about 66 times as large as the impact of individual gun murders. Whether those bills... (GunPolicy.org)