A review of dispensing records for the previous 3 weeks was carried out to estimate apportionment factors.
Using the source apportionment factors from Maciejczyk and Chen (2005), we have the following four source classes: SS, RS, RO, and MV.
While there's no doubt corporate power needs to be curbed, Nesrine Malik (Opinion, 10 December) proposes a "single sales factor apportionment" to tax corporations based on where sales are made, not where profits are reported.
Using factor analysis/source apportionment, we identified particle sources (e.g., motor vehicle emissions) and quantified daily contributions.
There is plenty of room for negotiations around the apportionment formula and related factors, but the ultimate prize of making a serious dent on organised corporate tax avoidance is worth pursuing.
Both GEP and ANN models were most sensitive to drainage area followed by mean annual precipitation, apportionment entropy disorder index, and shape factor.
We examined associations between daily exposure to PM2.5 components and sources identified through factor analysis and source apportionment, and daily symptoms and medication use in children with asthma.
In a reanalysis of data from the Harvard Six Cities study of daily mortality and PM, source apportionment approaches identified the mobile source factor as most strongly associated with increased daily mortality (Laden et al. 2000).
Factor analysis and source apportionment techniques [ Brown et al. 2007; U.S. Environmental Protection Agency EPAA) 2008; Watson et al. 2002] have been used for many years to help policy regulators identify sources of particle pollution.
Rather than a metric based on proximity to roads or traffic density, we used factor analysis and source apportionment techniques to examine exposures to potentially toxic portions of particle mass and the health of children residing in an area of significant mobile source activity.
