Linear regression on the per cent of crime guns (July 1996 to April 1997) banned by 1988 Maryland law
| Explanatory variable | Coefficient | Standard error | p Value |
|---|---|---|---|
| R2 = 0.61. | |||
| % Of adults below poverty line | 0.58 | 0.54 | 0.31 |
| % Of city population that are black males age 15–24 years | 0.41 | 1.01 | 0.70 |
| Regional dummy variable (north, south = 1) | 4.71 | 2.32 | 0.07 |
| Baltimore dummy variable (Baltimore = 1) | −12.66 | 4.20 | 0.01 |
| Constant | 7.09 | 5.50 | 0.22 |