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Testing seasonal adjustment with Demetra+
Antonian Karine Armenovna National Statistical Service of the Republic of Armenia
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Main results
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Graphs of the results
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Check for the sliding seasonal factor
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General quality diagnostics
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Residual seasonality
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Stability of the model
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Residuals
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Choice of the approach and regressors
Method used - X12 Specific holidays were chosen Specification used - RSA1.
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Conclusions Unfortunately we don’t have enough information to understand the results and be able to analyze them . We also had problems installing Demetra+ program, it was only possible to install on the computers with Windows 7, because we didn’t know minimal operating system requirements for Demetra+. The program Demetra+ works without problems. In future we would like to have sufficient information, that will help us to answer many questions that have arisen.
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Questions to be addressed
We would like to have more information on: 1. How to select between the specifications (RSA0 - RSA5)? 2. Explain in more detail the meaning of irregular component and the trend-cyclic component. 3. To understand and read the results of seasonal adjustment. 4. Explain ARIMA model and the airline model. 5. Impact of calendar effects on measuring economic activity.
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THANK YOU FOR YOUR ATTENTION!
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