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• Committee on National Statistics 331-332

TABLE 3-1 Hypothetical Inflation Adjustments for Person Income in the ACS

 Data: Consumer Price Index for All Urban Consumers (CPI-U), rounded (1983–1984 = 100) Year Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Average 2004 185 186 187 187 189 190 189 190 190 191 191 190 188.9 2005 191 192 193 195 194 195 195 196 199 199 198 197 195.3 2006 198 199 200 201 202 203 204 205 206 207 208 209 203.5 2007 210 211 211 212 213 214 215 216 216 217 218 219 214.5 (1) Adjustment Factors (x) for 2005 ACS 1-Year Period Person Income (x is applied to prior 12 months’ reported income) January 2005 sample persons (income reported for 01/04–12/04) x = [195.3/((185 + … + 190)/12)] = 1.034 February 2005 sample persons (income reported for 02/04–01/05) x = [195.3/((186 + … + 191)/12)] = 1.032 . . . . . . . . . November 2005 sample persons (income reported for 11/04–10/05) x = [195.3/((191 + … + 199)/12)] = 1.006 December 2005 sample persons (income reported for 12/04–11/05) x = [195.3/((190 + … + 198)/12)] = 1.003 (2) Adjustment Factors (x) for 2006 ACS 1-Year Period Person Income For each monthly sample as in (1) x = [203.5/(average of factors for previous 12 months)] (3) Adjustment Factors (x) for 2007 ACS 1-Year Period Person Income For each monthly sample as in (1) x = [214.5/(average of factors for previous 12 months)] (4) Adjustment Factors for 2005–2007 ACS 3-Year Period Person Income a. For 2005 sample persons x = 214.5/195.3 = 1.09, x is multiplied by the adjusted 2005 income (1) b. For 2006 sample persons x = 214.5/203.5 = 1.05, x is multiplied by the adjusted 2006 income (2) c. For 2007 sample persons x = 214.5/214.5 = 1.00, x is multiplied by the adjusted 2007 income (3) (5) 2005–2007 ACS 3-Year Period Person Income Estimates for All Persons Calculated as ( 4.a + 4.b + 4.c)/3 SOURCE: See http://www.bls.gov for monthly CPIs through February 2006; other months are hypothetical.

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