Environmental Engineering Reference
In-Depth Information
such testing will also reveal how it compares to the full CAPRI stand-alone version,
with its econometrically estimated or exogenously defined parameters. Equally, it will
be of interest scientifically to compare the bottom-up approach from APES-FSSIM
with the top-down down-scaling approach in the CAPRI-Dynaspat to assess
environmental externalities.
Conclusions
Both SEAMLESS-IF and CAPRI acknowledge that model-chains, linkages across
scales and between economic and bio-physical components, are state-of-the-art and
necessary attributes of tools for policy impact analysis of the new millennium to
respond to societal information needs for policy design. In this chapter, we high-
light some important differences and similarities between the two approaches.
SEAMLESS-IF has placed a strong focus on developing a flexible framework for
hosting and linking different components. It remains to be seen to what extent
this flexibility will be exploited in the years to come. Equally, SEAMLESS-IF
concentrated on the development and improvement of farm level components, and
of establishing interfaces to components at higher scales. The focus on farm level
is on bio-economic interrelations and technological adjustments. Exploitation in
SEAMLESS-IF is seen from a strong client perspective: client server implementation,
a limited but well defined set of indicators, and easy-to-use interfaces.
CAPRI's development is strongly driven by the focus on simulation changes in
the CAP and market conditions, so that improving simulation behaviour received
much attention. Equally, a decision on the most appropriate components in a model
chain for these kinds of scenarios was taken very early, and the components of
the chain then developed in an integrated way such that they are almost insepa-
rable by now - which is also one reason that CAPRI is treated as one component
in SEAMLESS-IF. The client-user model in CAPRI assumes that model results are
mostly exploited by modellers and forwarded to the client in an appropriate format,
along with explanatory notes and potential policy recommendations through a
combined effort of modellers and policy consultants. Therefore, CAPRI places
an emphasis on flexibility in exploitation and access to almost all model results on
different scales. Consequently, the whole modelling system including exploitation
tools is technically completely client based. Access to data and code (changes) is
managed via a server-based versioning system.
References
Adenaeuer, M. (2005). Modelling the European sugar sector - Incentives to supply sugar beets
and analysis of reform. Options . Dissertation, Bonn University, Germany.
Armington, P. S. (1969). A theory of demand for products distinguished by place of production.
IMF Staff Papers, 16 , 159-178.
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