School shootings are sadly commonplace in the US, but little scientific research has been devoted to studying their precise causes. To fill the gap and help direct public policy, Boston University researchers and others studied school shootings from 2013 through 2015.
The BMJ study documented 154 shootings using legal database LexisNexis and newspaper and broadcast media databases. The results indicated that states with background check laws, robust mental health and K-12 education spending, and higher urban populations had lower school-shooting incidence rates.
The authors say a national system to track mass shootings should be a priority.
Source: Injury Prevention