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Energy intensive infrastructure investments with retrofits in continuous time : effects of uncertainty on energy use and carbon emissions
 
Author:Framstad, Nils Christian; Strand, Jon; Collection Title:Policy Research working paper ; no. WPS 6430
Country:World; Date Stored:2013/04/30
Document Date:2013/04/01Document Type:Policy Research Working Paper
SubTopics:Energy Production and Transportation; Environmental Economics & Policies; Transport Economics Policy & Planning; Climate Change Mitigation and Green House Gases; Climate Change EconomicsLanguage:English
Region:The World RegionReport Number:WPS6430
Volume No:1 of 1  

Summary: Energy-intensive infrastructure may tie up fossil energy use and carbon emissions for a long time after investments, making the structure of such investments crucial for society. Much or most of the resulting carbon emissions can often be eliminated later, through a costly retrofit. This paper studies the simultaneous decision to invest in such infrastructure, and retrofit it later, in a model where future climate damages are uncertain and follow a geometric Brownian motion process with positive drift. It shows that greater uncertainty about climate cost (for given unconditional expected costs) then delays the retrofit decision by increasing the option value of waiting to invest. Higher energy intensity is also chosen for the initial infrastructure when uncertainty is greater. These decisions are efficient given that energy and carbon prices facing the decision maker are (globally) correct, but inefficient when they are lower, which is more typical. Greater uncertainty about future climate costs will then further increase lifetime carbon emissions from the infrastructure, related both to initial investments, and to too infrequent retrofits when this emissions level is already too high. An initially excessive climate gas emissions level is then likely to be worsened when volatility increases.

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