Allowing for uncertainty in exogenous shocks to CGE models: the case of a new renewable energy sector

Euan Phimister, Deborah Roberts* (Corresponding Author)

*Corresponding author for this work

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The paper explores the importance of allowing for uncertainty in the magnitude of exogenous shocks in CGE models. The shock examined is the introduction of a new onshore wind sector in North East Scotland. A simple analytical model is developed to show how, a priori, the size of the new sector (the model shock) is uncertain and asymmetrically distributed as a result of spatial correlation in costs and returns across potential development locations. The importance of allowing for this uncertainty is tested by comparing the results from a CGE model where the sector size is assumed known with certainty to those from a model where the sector size is a random variable with an asymmetric distribution. The results show the extent to which allowing for uncertainty can influence the magnitude of estimated impacts with some variables more sensitive to the uncertainty than others.
Original languageEnglish
Pages (from-to)509-527
Number of pages19
JournalEconomic Systems Research
Issue number4
Early online date10 Apr 2017
Publication statusPublished - Apr 2017

Bibliographical note

Deb Roberts acknowledges funding support from the Scottish Government’s Rural and Environmental Science and Analytical Services Division (RESAS) under Theme 8 ‘Vibrant Rural Communities’ of the Food, Land and People Programme (2011–2016).


  • CGE models
  • uncertain shocks
  • onshore wind
  • renewable energy
  • systematic sensitivity analysis


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