Table 2.

Single Hazardous Waste Model Performance Using Matched Houses

				Estimated WTP
Model	Sample	Specification	Instruments^{^a}	Mean	Median	5%	95%	% Errora^{^b}
True WTP	Full			1.9	0.0	-7.9	15.6	—
Difference	Full	Linear		1.7	0.0	0.0	12.6	-9.3
IV-Difference	Full	Linear	Mot	1.6	0.0	0.0	12.1	-12.9
Difference	Full	Semilog		1.7	0.0	0.0	12.7	-8.7
IV-Difference	Full	Semilog	Mot	1.7	0.0	0.0	12.3	-11.5
True WTP	Motorola			7.7	5.8	0.0	22.2	0.0
Difference	Motorola	Linear		6.8	4.4	0.5	20.4	-11.1
IV-Difference	Wet only	Linear	Mot	6.6	4.2	0.5	19.5	-14.6
Difference	Motorola	Semilog		6.9	4.4	0.5	21.6	-10.5
IV-Difference	Motorola	Semilog	Mot	6.7	4.3	0.5	20.9 -	-

Note: WTP, willingness to pay.
↵a "Mot" indicates identification of original houses located near Motorola waste site.
↵b Error computed based on mean WTP.