PPP VERSUS MER: SEARCHING FOR ANSWERS IN A MULTI-DIMENSIONAL DEBATE 1 2 DETLEF P. VAN VUUREN and KNUT H. ALFSEN Netherlands Environment Assessment Agency, MNP E-mail: Detlef.van.Vuuren@mnp.nl Research Department, Statistics Norway E-mail: firstname.lastname@example.org 1. Introduction In 2000, Nakicenovic et al. published a set of new baseline scenarios (Special Re- port on Emission Scenarios, SRES) in response to a request from IPCC to develop reference scenarios (without explicit climate policies) (Nakicenovic, 2000). These scenarios aimed to cover a signiﬁcant portion of the possible trajectories of future greenhouse gas (GHG) emissions and their driving forces on the basis of the scenar- ios in the literature. The scenarios were developed using six of different integrated assessment models, most of them with a more-or-less physical-orientation towards the description of the drivers of future GHG emissions (energy system models; physically oriented integrated assessment models). Consistent with most of the existing literature, the economic growth in most of the SRES scenarios and their regions were reported in US dollars based on conversions using market-exchange rates (MER). In 2003, however, the use of MER-based economic projections in SRES were subject to criticism, primarily from Castles and Henderson (see, for example, (Castles and Henderson, 2003b; Castles and
Climatic Change – Springer Journals
Published: May 4, 2006
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