. Author manuscript; available in PMC: 2012 Oct 26.

Published in final edited form as: Int J Environ Waste Manag. 2009 Jun 28;4(1-2):85–111. doi: 10.1504/IJEWM.2009.026886

Table 9.

Ambient particles and sources of air pollution – OLS and Spatial Autoregressive Models

	Log(PM_2.5)		Log(PM₁₀)
	OLS	SAM	OLS	SAM
(Trucks/minute)^0.5	0.258 (3.66)^**	0.261 (3.71)^**	0.477 (3.82)^**	0.46 (3.76)^**
SQRT(Distance to Industrial Cluster (m))	–0.002 (1.53)	–0.002 (1.62)	–0.003 (1.46)	–0.004 (1.77)
SQRT(Distance to the major road)	0.002 (1.52)	0.002 (1.46)	0.003 (1.51)	0.003 (1.37)
SQRT(Buses/minute)	–0.067 (1.46)	–0.068 (1.48	–0.215 (2.63)^**	–0.203 (2.55)^*
Outside Delhi Border = 1	0.079 (1.14)	0.086 (1.25)	0.09 (0.73)	0.102 (0.85)
Spatial autocorrelation		0.24 (1.31)		0.385 (2.46)^*
Constant	3.52 (40.25)^**	3.523 (40.41)^**	5.14 (33.13)^**	5.172 (34.01)^**
Observations	111	111	111	111
R-squared	0.3	0.31	0.28	0.32

Absolute value of t statistics in parentheses.

Significant at 5%.

^**

Significant at 1%.