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Assessing time series models for forecasting international migration: lessons from the United Kingdom

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Author(s)

Jakub Bijak, George Disney, Allan M. Findlay, Jonathan J. Forster, Peter W. F. Smith, Arkadiusz Wiśniowski

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Abstract

Migration is one of the most unpredictable demographic processes. The aim of this article is to provide a blueprint for assessing various possible forecasting approaches in order to help safeguard producers and users of official migration statistics against misguided forecasts. To achieve that, we first evaluate the various existing approaches to modelling and forecasting of international migration flows. Subsequently, we present an empirical comparison of ex post performance of various forecasting methods, applied to international migration to and from the United Kingdom. The overarching goal is to assess the uncertainty of forecasts produced by using different forecasting methods, both in terms of their errors (biases) and calibration of uncertainty. The empirical assessment, comparing the results of various forecasting models against past migration estimates, confirms the intuition about weak predictability of migration, but also highlights varying levels of forecast errors for different migration streams. There is no single forecasting approach that would be well suited for different flows. We therefore recommend adopting a tailored approach to forecasts, and applying a risk management framework to their results, taking into account the levels of uncertainty of the individual flows, as well as the differences in their potential societal impact.
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Original languageEnglish
Pages (from-to)470-487
Number of pages18
JournalJournal of Forecasting
Volume38
Issue number5
Early online date22 Mar 2019
DOIs
Publication statusPublished - Aug 2019

    Research areas

  • International migration, Forecasting, Bayesian methods, ARIMA models, Uncertainty, Decision making

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