The relative efficiency of Iranian’s rural traffic police: a three-stage DEA model

BMC Public Health

Table 4 Correlation matrix of input and output variables

Input variables	Crash	Injury	Death
Patrol team	0.27^***	0.34^***	0.35^***
Manpower	0.24^***	0.11	0.44^***
Patrol car	0.42^***	0.33^***	0.25^***
Motorcycle	0.06	0.17^*	0.23^**
Penalties and punishments	0.23^***	0.22^**	0.40^**
Cultural and educational score	0.05	0.01	−0.00
Speed camera	0.23^**	−0.02	0.05

ISSN: 1471-2458