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<br />block group is bordered by a major interstate, 1-5. and extends 3.5 miles north to Farmer John <br />Lat in the hills overlooking Valencia. <br /> <br />By the time of the 2004 update cycle BG 9201.07-1 had acquired 445 households with an <br />estimated $20.57 million In aggregate annual disposable dollars to contribute to the local <br />economy. The existence of these new households had been confirmed by two independent <br />data sources; the geocoded ADVO ZIP+4 active residential deliveries and the block group- <br />allocated USPS carrier route derlVery counts. These household counts were distributed to the <br />microgrids corresponding to their block face location, with their demographic profile assumed to <br />be analogous to recent in-migrants in the surrounding neighborhoods. The much finer <br />geographic resolution of microgrids compared to block groups allows a more focused market <br />evaluation of the impact of these new consumers. <br /> <br />AssIgnIng a Demographic Profile to new households <br />W hen household growth occurs in block groups with a significant base population as of Census <br />2000. these new households are assumed to have a demographic profile similar to other <br />households in the block group. However. with no reference 2000 households to rely on, <br />associating a demographic profile to the new households in BG 9201.07-1 requires a different <br />strategy. like thousands of other block groups with none or only a few households in 2000, it is <br />necessary to recruit the demographic profile for these new households from the households in <br />surrounding block groups. This is done by screening nearby block groups to identify those that <br />had experienced rapid growth of a similar housing type in the five years prior to the 2000 <br />Census. The ADVO residential delivery counts, classified into apartment and non-apartment <br />deliveries, provide an important clue to the type of housing being buill. The demographic profile <br />of the most similar block group is applied to the new households. <br /> <br /> <br />.~ .,~.,;.'" "'" , <br /> <br />....... <br />" 8Iod;_....1I-..tI <br />~ BFPllalt(U21l1Jl7., <br />~-...., <br />---- <br /> <br />Map 2: Bloc\< Face Points (BFP) in study area with BG 9201.07-1 highlighted <br /> <br />Scan/US Methodology White Paper <br /> <br />2 <br />