. 2016 Mar 24;11(3):e0152058. doi: 10.1371/journal.pone.0152058

Table 3. Regression results for non-spatial probit (NSP) and SLS spatial probit.

Variable	Coefficient(standard error)
	NSP1	NSP2	SLS1	SLS2	SLS3
Wdist		-0.0052^***			-0.0102^***
		(0.0002)			(0.0006)
NPA	-0.351^***	-0.363^***	-0.5335^***	-0.5355^***	-0.5562^***
	(0.019)	(0.0193)	(0.0542)	(0.0544)	(0.0236)
DEM	-0.0002^*	-0.0005^***	-0.0027^***	-0.0026^***	-0.0040^***
	(8.9e-05)	(0.0001)	(0.0001)	(0.0001)	(0.0001)
Slope	0.0067^**	0.0149^***	0.0502^***	0.0503^***	0.0795^***
	(0.0032)	(0.0031)	(0.0056)	(0.0056)	(0.0071)
Dpipes	0.0031^***	0.0036^***	0.0037^***	0.0037^***	0.0007^***
	(0.0002)	(0.0002)	(0.0003)	(0.0004)	(0.0001)
Dpipes²	-9.69e-06^***	-9.41e-06^***	-1.2e-05^***	-1.1e-05^***
	(7.38e-07)	7.30e-07	(1.0e-06)	(1.0e-06)
Dwells	-0.0020^***	-0.0001	-0.0016^***	-0.0016^***	0.0018^***
	(0.0002)	(0.0002)	(0.0004)	(0.0004)	(0.0002)
Dwells²	1.10e-5^***	6.19e-06^***	1.1e-05^***	1.1e-05^***
	(7.79e-07)	7.31e-07	(1.0e-06)	(1.0e-06)
Ddft	-0.1351^***	-0.159^***	-0.2495^***	-0.2495^***	-0.1334^***
	(0.0023)	(0.0024)	(0.0089)	(0.0087)	(0.0167)
Ddft²	0.0025^***	0.0030^***	0.0048^***	0.0048^***
	(4.38e-05)	(4.38e-05)	(0.0002)	(0.0002)
Droad	-0.0023^***		-0.0045^***	-0.0045^***
	(0.0002)		(0.0007)	(0.0007)
Droad²	6.99e-06^***		1.4e-05^***	1.4e-05^***
	(8.67e-07)		(2.0e-06)	(2.0e-06)
Driver	-0.0894^***		-0.2213^***	-0.2226^***
	(0.0028)		(0.0087)	(0.0086)
Driver²	0.0024^***		0.0060^***	0.0060^***
	(8.44e-05)		(0.0002)	(0.0002)
Dcity	-0.0038^***		-0.0057^***	-0.0057^***
	(0.0003)		(0.0005)	(0.0005)
Dcity²	5.47e-06^***		9.0e-05^***	9.0e-05^***
	9.31e-07		(1.0e-05)	(1.0e-05)
Precip	-0.330^***	-0.330^***	-0.4692^***	-0.4664^***	-0.5217^***
	(0.0180)	(0.015)	(0.0303)	(0.0304)	(0.0432)
Blkwt	-0.488^***	-0.516^***	-0.7648^***	-0.7643^***	-0.7960^***
	(0.0180)	(0.017)	(0.0259)	(0.0259)	(0.0392)
Whtwt	-0.140^***	-0.118^***	-0.3376^***	-0.3373^***	-0.1134^***
	(0.0195)	(0.019)	(0.0358)	(0.0358)	(0.0465)
Ralta	-0.135^***	-0.271^***	-0.1977^***	-0.1995^***	-0.3972^***
	(0.020)	(0.0184)	(0.0221)	(0.0221)	(0.0340)
Wet	-0.190^***	-0.196^***	-0.2048^***	-0.2033^***	-0.1931^***
	(0.0153)	(0.0153)	(0.0230)	(0.0231)	(0.0206)
Gley	0.722^***	0.407^***	-0.2555^***	-0.2492^***	-0.6985^***
	(0.085)	(0.0812)	(0.1075)	(0.1084)	(0.1168)
Camb	0.752^***	0.529^***	-0.0656	-0.0633	-0.3747^***
	(0.080)	(0.077)	(0.0932)	(0.0937)	(0.0976)
Alis	0.669^***	0.312^***	-0.3127^**	-0.3090^*	-0.5831^*
	(0.094)	(0.0912)	(0.2008)	(0.2023)	(0.1250)
Acri	0.661^***	0.419^***	-0.3417^***	-0.3359^***	-0.6428^***
	(0.0864)	(0.0825)	(0.1174)	(0.1187)	(0.1210)
constant	0.0075	-0.4605^***	2.135^***	2.1168^***	1.0653^***
	(0.100)	(0.0962)	(0.124)	(0.1254)	(0.1638)
ρ			0.0475^***	0.1036^***	0.1500^***
			(0.0190)	(0.0313)	(0.0223)

Note

*^, **^, *** significant at p< 0.1, p<0.05, p<0.01 respectively; n = 435,138.