Quality Adjustment Statistics for Girls Apparel : U.S. Bureau of Labor Statistics

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

GirlsDresses (AD012-01A) -- 2008
Variable Category	Variable Name	Parameter Estimate	Standard Error	T Statistic	Tolerance Statistic
	Intercept	3.24635	0.04928	65.88	.
Fiber:	Nylon	0.00353	0.002	1.77	0.89535
	Polyester	0.00292	0.00042	6.96	0.6089
	Rayon/Cotton	base
	Spandex	-0.00315	0.00661	-0.48	0.6806
Pieces:	Dress & Top	0.14912	0.04636	3.22	0.90665
	Skirt & Top	0.09599	0.08727	1.1	0.68289
	One piece	base
Brand category:	National	0.14432	0.04058	3.56	0.52188
	Private/Miscellaneous	base
Size range:	Girls	base
	Preschool	-0.08403	0.03441	-2.44	0.88619
Lining:	Full lining	0.19041	0.03984	4.78	0.67158
	Skirt lining	0.12734	0.05505	2.31	0.78164
	Bodice lining/No lining	base
Sleeve length:	Long sleeve	0.14255	0.04504	3.16	0.77842
	Short sleeve/Sleeveless	base
Fabric design:	Solid Color	0.11467	0.03305	3.47	0.83495
	Multicolor/Printed/Jacquard	base
Closure:	Zipper	0.10727	0.04079	2.63	0.77896
	Other closure/No closure	base
Details/Features:	Applique	0.22644	0.08366	2.71	0.885
	Side or back ties	0.11502	0.0353	3.26	0.77228
	No details/features	base
	Ruffles	-0.0883	0.03518	-2.51	0.89119
Type of business:	Full price children's store	0.16795	0.06201	2.71	0.68188
	Full price department	base
	Discount specialty	-0.58545	0.07036	-8.32	0.64952
	Toy store	-0.74691	0.20068	-3.72	0.7472
	Wholesale club	-0.85195	0.18397	-4.63	0.88911
	Discount department	-0.8891	0.04386	-20.27	0.50307
	Off-price department	-0.96694	0.06573	-14.71	0.82057
Control variable:	Northeast	0.05797	0.0377	1.54	0.90027
R2 = 0.8540; Adjusted R2 = 0.8416; F statistic = 69.13; Number of observations = 281
GirlsÂ?? Sweaters (AD013-01) -- 2008
Variable Category	Variable Name	Parameter Estimate	Standard Error	T Statistic	Tolerance Statistic
	Intercept	3.21365	0.06351	50.6	.
Style:	Cardigan	0.28499	0.05735	4.97	0.76781
	Sweater	base
Brand category:	National	0.15789	0.07457	2.12	0.73462
	Private/Miscellaneous	base
Size range:	Girls/Preteen	base
	Preschool	-0.25233	0.0794	-3.18	0.70338
Fabric design:	Multicolored	0.23622	0.05942	3.98	0.84189
	Solid color	base
Neck Style:	Turtle neck	0.64645	0.28161	2.3	0.8419
	Other neck style	base
Country of origin:	East Asia	base
	South Asia	-0.26418	0.10647	-2.48	0.78933
	Southeast Asia	-0.27984	0.07476	-3.74	0.83043
	Central America	-0.78021	0.14038	-5.56	0.70471
Type of business:	Apparel department	0.40938	0.14216	2.88	0.8505
	Full price department	base
	Off-price family clothing stores	-0.39419	0.27431	-1.44	0.88727
	Full-price children's/infants stores	-0.43374	0.10284	-4.22	0.84612
	Discount family clothing stores	-0.55318	0.11873	-4.66	0.82929
	Off-price department stores	-0.73352	0.11746	-6.24	0.73363
	Discount department stores	-0.89815	0.069	-13.02	0.60421
Control variables:	South	0.09041	0.06024	1.5	0.80532
	Spring/summer	-0.16296	0.06213	-2.62	0.83424
R2 = 0.8464; Adjusted R2 = 0.8184; F statistic = 30.30; Number of observations = 105
GirlsÂ?? Shirts, Blouses, and Other Tops (AD013-02) -- 2008
Variable Category	Variable Name	Parameter Estimate	Standard Error	T Statistic	Tolerance Statistic
	Intercept	2.91279	0.058	50.22	.
Fiber:	Spandex	0.02999	0.00972	3.09	0.86629
	Polyester	0.0033	0.00072333	4.56	0.7519
	Cotton	base
Brand category:	National	0.13134	0.04864	2.7	0.56931
	Private	base
	Miscellaneous	-0.45619	0.09019	-5.06	0.69448
Size range:	Girls/preteen	base
	Preschool	-0.09374	0.04176	-2.24	0.8564
Fabric design:	Multicolored	0.12858	0.049	2.62	0.86043
	Printed	0.09826	0.04662	2.11	0.77053
	Solid color	base
Closure:	Full closure	0.18303	0.08613	2.13	0.65396
	Partial closure	0.13127	0.05419	2.42	0.77503
	Other closure/No closure	base
Neck Style:	Turtle	0.25664	0.11683	2.2	0.85324
	Other Neck style	base
Details/Features:	Hood	0.27406	0.08902	3.08	0.85686
	Appliqué	0.22071	0.0877	2.52	0.88281
	Licensed design	0.19085	0.06954	2.74	0.65397
	Side or back ties	0.1884	0.084	2.24	0.80063
	Embroidery	0.11522	0.05577	2.07	0.8037
	No details/features	base
Country of origin:	East Asia	base
	Southeast Asia	-0.16167	0.04779	-3.38	0.6396
	North America	-0.22644	0.10491	-2.16	0.71496
	South America	-0.25751	0.12715	-2.03	0.82055
	Africa	-0.26804	0.1146	-2.34	0.79089
	Central America	-0.27805	0.05093	-5.46	0.5896
	Caribbean	-0.35454	0.13478	-2.63	0.84917
Type of business:	Catalog	0.39503	0.22483	1.76	0.90364
	Apparel department	0.2441	0.11945	2.04	0.8162
	Full price department	base
	Uniform stores	-0.25822	0.33863	-0.76	0.79407
	Discount family clothing stores	-0.36619	0.07578	-4.83	0.77333
	Full-price children's/infants stores	-0.45479	0.07951	-5.72	0.73329
	Hobby, toy and game shops	-0.45723	0.15898	-2.88	0.90947
	Off-price department stores	-0.49635	0.09759	-5.09	0.76511
	Warehouse clubs outlet	-0.91039	0.18926	-4.81	0.85289
	Discount department stores	-0.96916	0.04413	-21.96	0.681
	Off-price family clothing stores	-1.16989	0.14777	-7.92	0.84497
Control variable:	Spring/summer	-0.14915	0.03842	-3.88	0.80197
	Year-round	-0.15695	0.08576	-1.83	0.72792
R2 = 0.7852; Adjusted R2 = 0.7595; F statistic = 30.56; Number of observations = 310
Girls' Pants and Shorts (AD014-01) Â?? 2010
Variable Category	Variable Name	Parameter Estimate	Standard Error	T Statistic	Tolerance Statistic
	Intercept	2.842	0.06883	41.29
Style:	Other styles	Base
	Set (pants or shorts set)	0.81862	0.14526	5.64	0.90582
	Shorts	-0.28073	0.03771	-7.44	0.8732
Size range:	Girls	0.0814	0.03527	2.31	0.83491
	Preschool (3 to 6X)	Base
Fiber:	Cotton	-0.00122	0.00048425	-2.51	0.83226
	Other fibers	Base
Brand/label category:	National	0.16962	0.03679	4.61	0.88059
	Boutique	0.87357	0.10966	7.97	0.91658
	Private/Miscellaneous	Base
Waistband:	Set-on without elastic	0.31609	0.04913	6.43	0.41502
	Partial elasticized	0.24832	0.05598	4.44	0.44024
	Fully elasticized	Base
Details/Features:	SBR	0.14298	0.05953	2.4	0.92162
	Belt	0.07218	0.03819	1.89	0.87403
	Other details/features	Base
Type of Outlet:	Discount Department	-0.66304	0.0363	-18.27	0.80063
	Off-price Department	-0.701	0.07511	-9.33	0.93453
	Discount Specialty	-0.19089	0.06053	-3.15	0.80369
	Off-Price Specialty	-0.25994	0.11041	-2.35	0.90425
	Whole	-0.55227	0.13075	-4.22	0.89711
	Catalog	0.27531	0.13016	2.12	0.90538
	Other Outlets	Base
Region:	Northeast	0.14737	0.04848	3.04	0.75597
	Midwest	0.0927	0.03865	2.4	0.76899
	West	0.1488	0.04299	3.46	0.76308
	Other	Base
R2 = 0.7463; Adjusted R2 = 0.7310; F statistic = 48.63; Number of observations = 334
GirlsÂ?? Skirts (AD014-02) Â?? 2010
Variable Category	Variable Name	Parameter Estimate	Standard Error	T Statistic	Tolerance Statistic
	Intercept	3.05159	54.91	<.0001
Style	Straight	0.1198	0.04735	2.53	0.92847
	Other Styles	Base
Size	Preschool	-0.1414	0.05762	0.0152	0.84802
	Girls/Preteen	Base
Brand Category	National	0.2983	0.0492	6.06	0.87708
	Boutique	0.72123	0.30895	2.33	0.85426
	Private/Misc	Base
Waistband	Seton	0.30863	0.05137	6.01	0.73053
	Partial	0.1443	0.06092	2.37	0.72881
	Fully Elastic	Base
Details/Features	Lined	0.19564	0.08506	2.3	0.92911
	SBR	0.21442	0.09767	2.2	0.75893
	Other details/features	Base
Fabric Design	Print	0.14717	0.06667	2.21	0.82007
	Solid/Multi	Base
Fibers	Cotton	-0.00125	0.00053561	-2.33	0.81708
	Polyester/Rayon	Base
Outlet Type	Discount Dept	-0.87191	0.05052	-17.26	0.84039
	Off Price Dept	-0.97015	0.10154	-9.55	0.91972
	Full Price Children	-0.33511	0.09185	-3.65	0.79697
	Discount Specialty	-0.41832	0.11042	-3.79	0.70418
	Off Price Specialty	-1.13971	0.29429	-3.87	0.94146
	Whole Price	-1.39896	0.30552	-4.58	0.87354
	Other	Base
Countries	SE Asia	-0.08155	0.05846	-1.4	0.72498
	Other Countries	Base
R2 = 0.7606; Adjusted R2 = 0.7355; F statistic = 30.27; Number of observations = 180

Last Modified Date: August 25, 2011