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Revision of National Accounts Time Series in the Netherlands. Ruurd Schoonhoven ( RSNN@CBS.NL) Gert den Bakker, Bram de Boo, Ruben van der Helm Statistics Netherlands. Time series revisions in the Netherlands. Systematic time series revisions :

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revision of national accounts time series in the netherlands

Revision of National Accounts Time Series in the Netherlands

Ruurd Schoonhoven

( RSNN@CBS.NL)

Gert den Bakker, Bram de Boo, Ruben van der Helm

Statistics Netherlands

time series revisions in the netherlands
Time series revisions in the Netherlands
  • Systematic time series revisions :
  • - after benchmark revisions of 1977, 1987, 1995, 2001
  • for supply and use (and I/O) tables, sector accounts and labour accounts
  • Different methods were used ….
  • …. with different costs (time, resources) …
  • …. and with different quality of results
  • How to proceed in future?
suitability criteria for time series revisions
Suitability criteria for time series revisions
  • Resources
  • Time
  • Quality
  • Transparency
  • Flexibility
approaches to time series revisions
Approaches to time series revisions
  • 1. Annual backward calculation
  • 2. Benchmark years and interpolation
i annual backward calculation
I. Annual backward calculation
  • I.1 From microdata, with new concepts and classifications (‘from scratch’)
  • I.2 Adjustments superimposed on balanced pre-revision data
  • I.3 Linking pre-revision (or revised) growth rates to results for revision year
ii benchmark years and interpolation
II. Benchmark years and interpolation
  • II.1 Benchmark years ‘from scratch’
  • II.2 Benchmark years by superposition of adjustments on balanced pre-revision data
  • Intervening years by interpolation with pre-revision (or revised) growth rates
the 2001 time series revision
The 2001 time series revision
  • Conceptual revisions superimposed on pre-revision data year by year (I.2)
  • Statistical revisions interpolated between benchmark years (II.2)
  • Balancing of the results, year by year from 2000 back to 1969/1980
  • Strict process, good quality results, but (again) required much time and resources…..
requirements for future time series revisions
Requirements for futuretime series revisions
  • Harmonisation of revision policy within EU
  • Users want revised time series faster
  • Budget reduction
points of consideration 1
Points of consideration (1)
  • EU regulations: I/O tables back to 2000, main aggregates back to 1980
  • Main user: detailed >30 yr time series
points of consideration 2
Points of consideration (2)
  • From scratch or using pre-revision results
  • Working level of detail
  • Compiling the time series in parallel with the revision year
points of consideration 3
Points of consideration (3)
  • How to avoid (reduce) the need for year-by-year balancing?
  • Automatic balancing methods
discussion
Discussion
  • International harmonisation of revision policy for time series?
  • Inventory of methods currently used in different countries