Tramo Seats

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omerzeybek
Posts: 3
Joined: Fri Sep 23, 2011 7:56 am

Tramo Seats

Postby omerzeybek » Wed Apr 25, 2012 1:14 am

In Turkey central bank seasonally adjusts capacity ultilization rate by using tramo seats technique. Unfortunately they don't publish sub sectors in SA terms. So i have to calculate these sub sectors by using tramo seats. But when i tried to estimate seasonally adjusted series form Tramo Seats dialog screen, i recevied estimated series full of N/A terms. I left exactly 2 years left at the end of actual series for forecast but even i am unable to calculate SA series for my data.

Could yo please help me on this error?

trubador
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Posts: 1518
Joined: Thu Nov 20, 2008 12:04 pm

Re: Tramo Seats

Postby trubador » Wed Apr 25, 2012 2:10 am

That is not an error. If the procedure does not detect any seasonality, then it simply produces NA values. You can look at the details in the report, which is generated right after the procedure ends running. Please note that, the data begins at 2007 and therefore it may not be enough for the procedure to detect or identify any meaningful seasonality. If you like, you can explicitly model the seasonality via EViews' built-in seasonal dummy codes (e.g. @seas) or try another adjustment procedure (e.g. X12).

omerzeybek
Posts: 3
Joined: Fri Sep 23, 2011 7:56 am

Re: Tramo Seats

Postby omerzeybek » Wed Sep 05, 2012 12:47 am

Hi
i checked procedure output but as you could see from table i attached bellow it indicates procedure is finalized and seasonal adjustred series are produced. But eviews didn't create a proper (SA) series after the procedure.

FORECAST OF FINAL COMPONENT



ORIGINAL SEASONALLY TREND-CYCLE SEASONAL IRREGULAR
(UNCORRECTED) ADJUSTED COMPONENT
SERIES SERIES


80.98 82.43 81.57 -1.453 0.8579
81.01 82.48 81.62 -1.471 0.8579
81.44 82.53 81.68 -1.097 0.8579
84.86 82.60 81.74 2.259 0.8579
83.71 82.68 81.82 1.030 0.8579
81.53 82.76 81.91 -1.237 0.8579
83.24 82.86 82.00 0.3781 0.8579
83.47 82.97 82.11 0.5007 0.8579
83.92 83.08 82.23 0.8412 0.8579
84.54 83.21 82.35 1.327 0.8579
83.36 83.35 82.49 0.1072E-01 0.8579
82.40 83.49 82.64 -1.088 0.8579
82.09 83.55 82.69 -1.453 0.8579
82.12 83.59 82.73 -1.471 0.8579
82.55 83.65 82.79 -1.097 0.8579
85.97 83.71 82.86 2.259 0.8579
84.82 83.79 82.93 1.030 0.8579
82.64 83.88 83.02 -1.237 0.8579
84.35 83.97 83.12 0.3781 0.8579
84.58 84.08 83.22 0.5007 0.8579
85.04 84.20 83.34 0.8412 0.8579
85.65 84.32 83.46 1.327 0.8579
84.47 84.46 83.60 0.1072E-01 0.8579
83.52 84.61 83.75 -1.088 0.8579
is it possible that there would be any other problem rather than a calculation problem


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