capri:concept []

This is an old revision of the document!

<HTML>

       <div class=rightwindow>

    <H1>Concept</H1>

    <P>CAPRI is a partial equilibrium model for the agricultural sector developed for policy impact assessment

    of the Common Agricultural Policy and trade policies from global to regional scale with a focus on the EU.

    Main features:</P>

    <div style="float:right;padding:20px"><a href="images\overview.jpg"><img style="text-decoration: none;border: none" src="images\overview.jpg"/></a></P></div>

    <UL>

      <LI><P> Comparative partial static equilibrium model, solved by iterating supply

        and market modules<P></LI>

      <LI><P><B>Supply module:</B> separate, regional, non-linear programming models allowing

        to directly implement most policy measures with highly differentiated

        set of activities. Allocation based on profit maximising behaviour calibrated

        to exogeneous elasticities (animals) and estimated multi-product cost

        functions (annual crops); provision of nutrient balances and gas emissions with global warming

        potential based on production system. Template approach with structurally identical models

        which differ in parametrization. Cover completely EU agriculture (280 regional models or 1.900 farm type models) <A HREF=supply.htm> read more ..</A></P></LI>

      <LI><P><B>Market module:</B> global spatial multi-commodity Model. <A HREF=regMarket.htm>28 trade blocks and 60 countries</A>.

         Flexible and well-behaved functional forms. Armington assumption to model bi-lateral trade flows.

         Tariff Rate Quotas and preferential agreements. Subsidised exports and market interventions <A HREF=market.htm> read more ..</A></P></LI>

      <LI><P>Equilibrium ensures cleared markets for products and young animals,

        match of feeding requirements of national herds</P></LI>

      <LI><P>Welfare analysis, rich set of <A HREF="econind.htm">economic</A> and <A HREF="envind.htm">environmental</A> indiactors</P></LI>

    </UL>

    <UL>

      <LI><P><A HREF=spatDown.htm>Spatial downscaling</A> of crop shares, yields, stocking densities, fertilizer application rates to 150.000

             Homogenous Soil Mapping Units (cluster of 1x1 km grid cells) for EU27 and link to bio-physical model DNDC</P></LI>

    <P>Technically, CAPRI is realised in <A HREF=http://www.gams.com/>GAMS</A> and steered by a <A HREF="/dokuwiki/doku.php?id=capri:gui:GUI">Graphical User Interface realised in Java</A>.

    The GAMS code and the data base are hosted on <A HREF=http://subversion.tigris.org/>SVN</A> version control server.</P>

       </div><!-- Ende RightWindow -->

    </div><!-- Ende content -->

</HTML>