Quality Adjustment Statistics for Other Video Equipment : U.S. Bureau of Labor Statistics

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Bureau of Labor Statistics > Consumer Price Index > Methods > Quality Adjustment

Other Video Equipment
DVD Players (2005)
Variable Name		Parameter Estimate	Standard Error	T Statistic
	Intercept	4.15693	0.05422	76.66
Brands:
	Inferior Brand	-0.37637	0.08898	-4.23
	Superior Brand	0.21677	0.07539	2.88
Features:
	5 Disc Changer	0.26923	0.08472	3.18
	Recorder	0.99741	0.07945	12.55
	Upconversion	0.53642	0.10484	5.12
	Digital Optical Output	0.11136	0.05915	1.88
	WMA files	0.09924	0.05774	1.72
	High Def Audio	0.21975	0.08051	2.73
	Divx	0.17756	0.11582	1.53
	VCR Combo	0.54139	0.05618	9.64
	7" Screen	1.13395	0.12687	8.94
	9" Screen	1.6239	0.1688	9.62
Control Variables:
	Warehouse	-0.38509	0.07028	-5.48
	Full Service Dep't Store	-0.19067	0.07658	-2.49
	Discount Dep't Store	-0.24361	0.05652	-4.31
R2 = 0.7995; Adjusted R2 = 0.7800; F Statistic = 40.88; Number of Observations = 136
Camcorders (2010)
Variable		Coefficient	Chi2 Statistic
	Intercept	3.987026	N/A
Storage:
	Hard Disk	0.0820014	7.334**
	Internal Solid-State	-0.0779209	27.113**
	MiniDV	0.4129267	224.632**
	Other Tape	0.3030759	6.732**
	DVD	0.1609633	29.542**
Storage Size:
	Hard Disk (GB)	0.0012437	18.954**
	Solid-State (GB)	0.0131182	500.499**
Sensor:
	CCD	0.0999572	19.083**
	Three Sensor	0.6568976	494.722**
Zoom:
	Optical	0.0042259	44.076**
	Electronic	-8.46e-05	36.919**
Resolution:
	1080	0.3809395	301.039**
	720	0.1174442	47.626**
Stability:
	Optical	0.220705	90.775**
	Electronic	0.1703267	72.252**
Weight:
	Over 1 LB	0.2073224	96.862**
	Under 3 oz	-0.0968554	8.051**
Brand:
	Top	0.3302393	321.431**
	Low	-0.3033826	167.754**
Battery:
	Standard Size	-0.21699	86.310**
Box-Cox Parameters		Coef.	Std. Err.	z	P>\|z\|	[95% Conf. Interval]
Theta		-0.0687973	0.0131046	-5.25**	0	-0.0944819	-0.0431128
Pseudo-R2 = 0.74; Number of Observations = 2857; ** Sig at 1%

Last Modified Date: August 25, 2011