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. 2009 May 29;86(4):525–537. doi: 10.1007/s11524-009-9351-x

Table 3.

Model statistics for linear regressions on intrastate gun trafficking with and without controlling for local gun ownership levels

Model covariates Model 1 R2 = 0.520 Model 2 R2 = 0.565
Β (SE) Signif. Β (SE) Signif.
Constant 4.86 (0.47) <0.001 1.57 (1.59) 0.329
Strong gun dealer regulation and oversight −1.92 (0.91) 0.042 −1.76 (0.89) 0.053
Law enforcement ever does undercover stings of retail gun dealers 0.88 (0.78) 0.266 0.94 (0.75) 0.220
Private handgun sales regulated −1.60 (0.56) 0.006 −1.27 (0.58) 0.027
Discretionary purchase permit licensing −1.50 (0.71) 0.040 −0.23 (0.90) 0.803
% population in 50-mile radius of city in other states lacking comprehensive gun sales regulations −0.07 (0.04) 0.079 −0.05 (0.04) 0.186
Distance (miles) to border of nearest state lacking strong gun dealer regulation −0.005 (0.003) 0.158 0.004 (0.003) 0.235
Local gun ownership proxy 0.06 (0.03) 0.036

Excludes data for Gary, IN due to influential outlier