I've been running a statistical study on this for a while, some preliminary results:
30% of gun violence can be explained by the number of individuals that cannot read at a 6th grade level (alternatively, spending per student has no statisical relationship with outcomes).
The % of households with guns does not affect gun violence rates.
The % on welfare does not affect gun violence rates.
Poverty rate does not affect gun violence rates.
Gun bans increase gun violence before settling to historic norms, likely due to the influx of supply away from legitimate markets.
Surprisingly, voting Democrat shows an increase in gun violence rates for a county, but this is likely due to a third factor that affects both.