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Alternative Forecasts of Danish Life Expectancy

Abstract : In the last three decades, considerable progress in mortality forecasting has been achieved, with new and more sophisticated models being introduced. Most of these forecasting models are based on the extrapolation of past trends, often assuming linear (or log-linear) development of mortality indicators, such as death rates or life expectancy. However, this assumption can be problematic in countries where mortality development has not been linear, such as in Denmark. Life expectancy in Denmark experienced stagnation from the 1980s until the mid-1990s. To avoid including the effect of the stagnation, Denmark’s official forecasts are based on data from 1990 only. This chapter is divided into three parts. First, we highlight and discuss some of the key methodological issues for mortality forecasting in Denmark. How many years of data are needed to forecast? Should linear extrapolation be used? Second, we compare the forecast performance of 11 models for Danish females and males and for period and cohort data. Finally, we assess the implications of the various forecasts for Danish society, and, in particular, their implications for future lifespan variability and age at retirement.
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Marie-Pier Bergeron-Boucher, Søren Kjærgaard, Marius D. Pascariu, José Manuel Aburto, Jesús-Adrián Alvarez, et al.. Alternative Forecasts of Danish Life Expectancy. Stefano Mazzuco; Nico Keilman. Developments in Demographic Forecasting, 49, Springer International Publishing, pp.131-151, 2020, The Springer Series on Demographic Methods and Population Analysis, 9783030424725. ⟨10.1007/978-3-030-42472-5_7⟩. ⟨hal-02955322⟩

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