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Separating ethics from facts in climate-change  economics: a brief discussion of the recent work of Humberto Llavador,  John Roemer, and Joaquim Silvestre /   Stergios Athanassoglou, FEEM blog, 29/03/2011http://www.feem.it/getpage.aspx?id=3879Intergenerational tradeoffs are intrinsic to climate-change policy.   They arise because, while the costs of climate-change mitigation are  immediate, its essential benefits are likely to be felt only far into  the future. Given this asymmetry, it is not clear how the present  generation should craft its long-term environmental policy. Indeed, what  welfare measure should it employ in the comparison of different  intertemporal consumption paths? That is to say, on what formal basis  should it decide that one consumption path is “better” than another?...