Explanatory factors	Model 1	Model 2	Model 3	Model 4	Model 5	Model 6
Density (person/ha)	0.01103*	0.03128*	0.01804*	0.01675*	0.01366*	0.02139*
Squared density (quadratic term)		-0.00017*	-0.00010*	-0.00010*	-0.00009*	-0.00012*
Distance to CBD (km)			-0.01540*	-0.02871*	-0.03556*	-0.01173*
Squared distance to CBD (quadratic term)				0.00025*	0.00032*
Interaction: Density X Distance					0.00014*	-0.00017*
Constant	1.49041*	1.08217*	1.70449*	1.87123*	1.97432*	1.63650*
R2	0.058	0.088	0.113	0.115	0.116	0.113
Log likelihood	-24561.63	-23770.67	-23135.78	-23067.70	-23061.87	-23118.78
LR Chi2	3025.93*	4607.86*	5877.62*	6013.78*	6025.44*	5911.63*
N	9,856	9,856	9,856	9,856	9,856	9,856