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1991 | nr 345 Usefulness of demographic modelling | 17--36
Tytuł artykułu

Do moere advanced forecast models produce more accurate forecasts?

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
In this paper I have demonstrated how a separation model can be used to analyse ex-post observed forecast errors, when a series of population forecasts is available. The model was applied to nine population forecasts that the Netherlands Central Bureau of Statistics produced between 1950 and 1980. An. important question which can be answered with such a model is, whether changes in forecast methodology have resulted in smaller errors. I have argued that an appropriate approach should involve that one disentangles period effects and duration effects in these forecast errors. Period effects are supposed to express social and demographic conditions as they were observed in reality (some time after the forecast was produced), and their impact on forecast errors. (fragment of text)
Twórcy
Bibliografia
  • Ahlburg D.A. (1982): How accurate are the U.S. Bureau of the Census projections of total live births?. "Journal of Forecasting" 1.
  • HagenaarsJ.A.P., 1989 L-oglineaire analyse van herhaalde surveys: panel, trend- en cohortonderzoek (Log-linear analysis of repeated surveys: panel, trend and cohort research), Ph. D. Thesis, University of Tilburg.
  • Hobcraft J., Menken J. , Preston S. (1982, Age, period and cohort effects in demography: a review, Population Index.
  • Keilman, N.W.( 1989 a): De trefzekerheid van de nationale bevolkings-prognose (The accuracy of the national population forecast), in: H.A.Becker (ed.):Terugkl.iken.op toekomstonderzoek (Reflecting on futures research) (to appear).
  • Keilman, N.H. (1989 b): Population forecasting errors - a first analysis, manuscript.
  • Maddala G.S. (1977): Econometrics. McGraw-Hill, Auckland etc. (International Student Edition, fifth printing 1983).
  • Mason W. , and S. Fienberg (eds.) (1985): Cohort analysis in social research: beyond the identification problem. Springer Verlag, New York etc.
  • Reynolds, H.T. (1977): The analysis of cross - classifications. The Free Press, New York and London.
  • Schreurs R. (1989): Een beschri.ivende analyse van de trefzekerheid van nationale bevolkingsprognoses (A descriptive analysis of the accuracy of national population forecasts), NIDI Report no. 2, Netherlands Interdisciplinary Demographic Institute, The Hague.
  • Willekens F. J. , N. Baydar (1984): Age-period-cohort models for forecasting fertility, NIDI-Working Paper no. 45, Netherlands Inter- university Demographic Institute, Voorburg.
Typ dokumentu
Bibliografia
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