United States Department of Transportation
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Statistical Policy Working Paper 7. An Interagency Review of Time-Series Revision Policies
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1982-10-01
[PDF-58.86 KB]
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Abstract:This report includes recommendations formulated by the interagency subcommittee concerning policies and practices for estimating and publishing revisions to time series. The subcommittee conducted a series of meetings to discuss agency policies, and the impact of alternative policies on users. Because of the wide diversity of policies and users, a questionnaire was developed to give a clearer picture of the extent of this diversity. The final version of the questionnaire contained eight substantive questions, and this discussion is based on series-by-series tabulation of the responses. From the responses it was found that most agencies selected monthly time-series to review, presumably because revision is considered a bigger problem in these series. Thus, annual time-series as a group are not adequately covered by this analysis. A few quarterly and weekly series are covered. These subcommittee recommendations were not formally endorsed by the Federal Committee on Statistical Methodology nor by the Office of Management and Budget. The findings presented here provide guidance for improving agency practices with respect to time series.
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