A Tale of Three Seasonal Adjustment Procedures: The Case of Sweden's GDP
AbstractThe paper compares the search for structural breaks in Sweden's GDP conducted with X-11 seasonally adjusted data, with seasonally unadjusted data, and with temporally aggregated data. A structural break (in 1980) is found only in the X-11 adjusted data, it is plausible to conclude that this break is due to data distortions (particularly, distortions caused by the application of the filter). However, this interpretation is only plausible a posteriori: had the seasonally unadjusted data not been available, the break found in the adjusted series could be just as well interpreted as a break in the economy and not as a break in the data. The study suggests that seasonally adjusted data should not be used when the unadjusted version is also available.
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Bibliographic InfoPaper provided by Stockholm School of Economics in its series Working Paper Series in Economics and Finance with number 230.
Length: 18 pages
Date of creation: 30 Mar 1998
Date of revision:
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More information through EDIRC
X-11 filter; seasonal adjustment; seasonal unit roots;
Find related papers by JEL classification:
- C12 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Hypothesis Testing: General
- C32 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Time-Series Models; Dynamic Quantile Regressions; Dynamic Treatment Effect Models; Diffusion Processes
This paper has been announced in the following NEP Reports:
- NEP-ALL-1998-06-09 (All new papers)
- NEP-ECM-1998-06-03 (Econometrics)
- NEP-ETS-1998-06-03 (Econometric Time Series)
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
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