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Exhibit B Household Methodology The following is an excerpt from SRC's web site. A complete copy of the Methodologies can be found at http://www.demographicsnow.com/AllocateOnline.srct?Show Page=static/methodology.htm#Summary Methodologies and Data Sources AGS uses a wide range of data sources in constructing its estimates and projections, including: ^ Census Bureau tabulations from 1970, 1980, 1990 and most recently, the release of the 2000 Census ^ USPS and commercial source ZIP+4 level delivery statistics ^ Census Bureau estimates and projections of population characteristics at various levels of geographic detail, including the latest estimates of population at the city level ^ The Census Bureau's American Community Survey results, which cover over 60% of the national population and serve as an increasingly important attribute base at the county, metro, and state levels. ^ Bureau of Labor Statistics estimates and projections of employment by industry and occupation at the county level ^ Medicare eligible population counts at the ZIP code level, including population by sex and 5-year age cohorts, provided by the Health Care Financing Administration of Social Security. These counts provide a very accurate local count of the population aged 65 and higher. ^ Internal Revenue Service statistics on tax filers and year-to-year migration ^ Census Bureau's Current Populations Survey (CPS), which provides detailed demographic breakdowns and enables a thorough longitudinal analysis of demographic trends ^ Experian's INSOURCE, a household level credit and demographic database which covers the vast majority of households INSOURCE is a vast database at the household and individual level that Experian provides to AGS for use in its demographic estimates. The INSOURCE database was aggregated to the ZIP+4 and Biock Group levels of geography for analysis and standardized to Census Bureau county level current estimates. A large number of demographic attributes from INSOURCE were utilized in building the current year estimates, including: ^ Population ^ Population by Age ^ Households ^ Household Size ^ Household Type (presence of children) ^ Marital Status ^ Income ^ Hispanic origin ^ Population of Asian origin ^ Dwelling Tenure (own/rent) ^ Length of Residence In turn, the AGS demographic estimates are used as the foundation of Experfan's U.S. MOSAIC segmentation system. Now in its seventh year of use within the AGS estimates methodology, INSOURCE provides an excellent source of small area year-to-year change, which greatly improves the quality of local estimates, especially in areas of growth.