Table 3 Descriptive Statistics: Explanatory Variables

Table 3
Descriptive Statistics: Explanatory Variables

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    Mean Standard deviation
 Economic variables      
Rpcinc overall 13736.4 3444.1
Rpcinc across-counties   3327.3
Rpcinc across-years   985.5
Cpigas overall 98.93 9.89
Cpigas across-counties   1.01
Cpigas across-years   9.84
Cpialc overall 128.73 24.30
Cpialc across-counties   3.42
Cpialc across-years   24.07
Uerate overall 0.101 0.047
Uerate across-counties   0.041
Uerate across-years   0.023
Exposure variables      
Vmtge60 overall 5.01E+08 1.01E+09
Vmtge60 across-counties   1.00E+09
Vmtge60 across-years   1.53E+08
Vmtlt60 overall 3.80E+09 8.45E+09
Vmtlt60 across-counties   8.42E+09
Vmtlt60 across-years   1.27E+09
Pctge60 overall 0.168 0.042
Pctge60 across-counties   0.041
Pctge60 across-years   0.009
Popden overall 560.27 2088.10
Popden across-counties   2103.30
Popden across-years   90.93
Alcohol variables      
Alclic overall 14272.9 29331.9
Alclic across-counties   29496.8
Alclic across-years   2116.3
Pc_dui overall 0.013 0.007
Pc_dui across-counties   0.005
Pc_dui across-years   0.005
Regulatory variables      
AB541 overall 0.944 0.229
AB541 across-years   0.229
APS overall 0.500 0.500
APS across-years   0.500
Slmt_65 overall 0.667 0.472
Slmt_65 across-years   0.472
Slmt_70 overall 0.167 0.373
Slmt_70 across-years   0.373

Key:
Overall standard deviation:
calculated across all groups and time periods.
Across-counties standard deviation: obtained by first calculating the 18-year average for each county and then calculating the standard deviation across counties.
Across-years standard deviation: obtained by first calculating, for each year, the average over all counties and then calculating the standard deviation for the 18-year period.