And, with thousands of zip-code
locations, we were also able to precisely estimate the relationships between cash shares and location-specific variables.
I would argue that while some institutions continue to rely on MSA-level HPIs, many savvy lenders are drilling down to ZIP-code
level and below to better understand their collateral risk.
On average, housing price growth rates had a standard deviation of about 7.5 percentage points at the zip-code
level within MSAs from 2006 to 2012 This is lower than the 14 percentage point standard deviation across MSAs from 2006-2012, and is also lower than the standard deviation at the zip-code
level within MSAs from 2000-2006 (18 percentage points).
The new analysis expanded the data set by comparing personal and environmental attributes at the zip-code
level throughout the 2005 study area: Cook, DuPage, Kane, Lake, McHenry and Will counties in the Chicago metropolitan area, and the more rural DeKalb, Kendall, Grundy and Kankakee counties.
centroids are spatially associated with areas of high commercial activity and population density, and therefore may often represent the unit of interest (e.g., physician or hospital locations).
Geographical data pertaining to EITC distributions in the Nashville MSA for 2003 (the most recent year for which zip-code
level data was available) considered EITC dollar amounts and the density of EITC returns compared to all tax returns relative to the income level of the zip-code
Median income in the zip-code
areas was looked at, and it did tend to be lower in the minority neighborhoods, but the pharmacists most commonly said low demand was the reason they did not carry better supplies.
We used a time-series approach at the ZIP-code
level to avoid confounding by intrinsic differences between sprayed and nonsprayed ZIP codes (e.g., in underlying asthma rates or patterns of public hospital use) and to maximize sensitivity to temporal determinants of asthma-related visit rates.
This isn't the first time insurers' ZIP-code
data has been the center of controversy.
The census-tract target zone (Figure 4A) includes 94% (491 of 524) of these case children, whereas the zip-code
target zone (Figure 4B) includes 97% (509 of 524).
The amount of inter-zip code variation was quantified by using several measures of variation: the range (highest and lowest values per 10,000 zip code residents), the unweighted (CVU) and population-weighted (CVW) coefficients of variation (determined by dividing the standard deviation of the zip-code
distribution for each procedure by its mean), the chi-square, the square root of Wennberg's systematic component of variation (root SCV) that estimates interarea variation after adjusting for intraarea variation (McPherson, Wennberg, Hovind, et al.