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Conditional Probabilistic Population Forecasting

Author

Listed:
  • Warren Sanderson
  • Sergei Scherbov
  • Brian O'Neill
  • Wolfgang Lutz

Abstract

Since policy-makers often prefer to think in terms of alternative scenarios, the question has arisen as to whether it is possible to make conditional population forecasts in a probabilistic context. This paper shows that it is both possible and useful to make these forecasts. We do this with two different kinds of examples. The first is the probabilistic analog of deterministic scenario analysis. Conditional probabilistic scenario analysis is essential for policy-makers because it allows them to answer “what if” type questions properly when outcomes are uncertain. The second is a new category that we call “future jump-off date forecasts”. Future jump-off date forecasts are valuable because they show policy-makers the likelihood that crucial features of today’s forecasts will also be present in forecasts made in the future.

Suggested Citation

  • Warren Sanderson & Sergei Scherbov & Brian O'Neill & Wolfgang Lutz, 2003. "Conditional Probabilistic Population Forecasting," VID Working Papers 0303, Vienna Institute of Demography (VID) of the Austrian Academy of Sciences in Vienna.
    • Handle: RePEc:vid:wpaper:0303
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    References listed on IDEAS

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    6. Tomas Frejka & Jean-Paul Sardon, 2003. "Fertility in Austria: Past, Present and the Near Future," VID Working Papers 0302, Vienna Institute of Demography (VID) of the Austrian Academy of Sciences in Vienna.
    7. Nico Keilman & Dinh Quang Pham & Arve Hetland, 2002. "Why population forecasts should be probabilistic - illustrated by the case of Norway," Demographic Research, Max Planck Institute for Demographic Research, Rostock, Germany, vol. 6(15), pages 409-454.
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