(5.) This decomposition of GDP growth into three components parallels the decomposition used in the Census Bureau's X-13
seasonal adjustment filter.
Indirect
seasonal adjustment and linking December 2013 indexes to September 2013 indexes.
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 top figure at right shows how much a second round of
seasonal adjustment adds to or subtracts from each quarter's estimates of real GDP growth.
Economists use
seasonal adjustment to remove or discount normal seasonal changes, thus making underlying trends easier to identify.
For example, if swimwear sales in summer were higher than those in the winter, a
seasonal adjustment could be made to look for any underlying trends.
underemployment, as measured without
seasonal adjustment, was stagnant at 18%.
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.
The surplus in the current account, the broadest measure of Japan's trade with the rest of the world, stood at 407.5 billion yen ($5.3 billion) in August before
seasonal adjustment, finance ministry data showed.
"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 14.5 percent.