In general, the choice of whether to use direct or indirect
seasonal adjustment is related to the level of index aggregation.
Even after
seasonal adjustment, the irregular components of a time series are often noisy and variable.
If the new pattern persists, the
seasonal adjustment method will eventually reflect it; if the pattern keeps shifting, however, seasonally adjusted data will become chronically troublesome.
Moreover, we argue that failing to control for abnormal weather effects distorts conventional
seasonal adjustment procedures.
The middle figure at right plots the quarterly
seasonal adjustments to real GDI.
Gallup does not apply a
seasonal adjustment to underemployment.
This would mean that the price of the property has to be finally adjusted (after adjusting for all other factors) by the difference in the
seasonal adjustment factors between the two months.
After
seasonal adjustment, the two sales peaks associated with the end-dates of the home-buyers' tax credits are clear," Pakko writes.
The unemployment figure in January according to TurkStat, prior to the
seasonal adjustment, stood at 14.
This was due to a
seasonal adjustment issue: securities firms hired fewer summer interns so when the expected loss in intern employment was not found in the raw September data, the
seasonal adjustment processed it as a gain.
The
seasonal adjustment comes by way of a complex and well-established algorithm that tweaks the actual number of jobs reported in the BLS survey upward or downward based on whether the month in question has traditionally seen more or fewer jobs than other months.
6 percent from November to December 2008 after
seasonal adjustment, according to preliminary data released by the Bureau of Labor Statistics of the U.
