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Conditional Probabilistic Population Forecasting |
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| Authors: | Warren C Sanderson Sergei Scherbov Brian C O'Neill Wolfgang Lutz |
| Institution: | State University of New York, Stony Brook, NY, USA. E-mail:;Vienna Institute of Demography, Austrian Academy of Sciences and the International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria. E-mail:;International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria and Watson Institute for International Studies, Brown University, Providence, RI, USA E-mail:;International Institute for Applied Systems Analysis (IIASA), Laxenburg, Austria and Vienna Institute of Demography of the Austrian Academy of Sciences. E-mail: |
| 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. |
| Keywords: | Forecasting Population forecasting Probabilistic forecasting Scenarios Scenario analysis |