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capri:concept:spatcrops [2011/04/12 12:29]
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capri:concept:spatcrops [2011/04/12 12:30] (current)
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 +<​H2><​a class="​intext"​ HREF="/​dokuwiki/​doku.php?​id=capri:​concept:​spatialdownscaling">​Agricultural land use and environmental indicators at 1x1 km grid resolution</​A><​BR>​ - Cropping shares</​H2>​
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 +<hr style="​color:​ '​blue';​ height: '​2';​ text-align: '​left';">​
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 +Main Contributors statistical estimation and concept: Markus Kempen, Thomas Heckelei,​Wolfgang Britz, Adrian Leip<​BR>​
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 +Main Contributor GAMS coding: Wolfgang Britz, Markus Kempen
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 +<​P>​The <​B>​crop shares</​B>​ are estimated based on locally weighted bi-nomimal regression models, using the LUCAS sample as observations,​
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 +and soil and climatic conditions, slope and altitude as explanatory variables. The forecast from the regression model and its error distribution
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 +define the a priori distribution for the Highest Posterior Density estimator, which determines the most probable crop shares per HSMU
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 +which simulatneously recover the crop areas reported in the Farm Structure Survey, and exhaust the area of the HSMU.</​P>​
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 +<​P><​a href="​images\ARABShare.jpg"><​img style="​text-decoration:​ none;​border:​ none;color: white" src="​images\ArabShare.jpg"​ width="​400px"/></​a></​P>​
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 +<​P><​img src="​images\HDP_EST.jpg"​ width="​600"></​P>​
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 +<hr style="​color:​ '​blue';​ height: '​2';​ text-align: '​left';">​
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 +<​H3>​More information</​H3>​
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 +<P class="​pubparagraph"><​span class="​pubAuthor">​Kempen M., Heckelei T. und Britz W..</​span>:<​BR>​
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 +<I>A Statistical Approach for Spatial Disaggregation of Crop Production in the EU</​I>​
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 +<​BR>​in:​ Arfini F. (editor): Modelling Agricultural Policies: State of the Art and New Challenges, Proceedings of the 89th European Seminar of the
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 +European Association of Agricultural Economists (EAAE), Parma, Italy, Februrary 3-5, 2005 (pages 810-830)</​p>​
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 +<BR>
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 +<P class="​pubparagraph"><​span class="​pubAuthor">​Leip,​ A., Marchi, G., Koeble, R., Kempen, Britz W. and Li, C.</​span>:<​BR>​
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 +<​I><​A HREF="​http://​www.biogeosciences.net/​5/​73/​2008/​bg-5-73-2008.html">​Linking an economic model for European agriculture with a mechanistic model to estimate nitrogen losses from cropland
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 +soil in Europe</​A></​I><​BR>​Biogeosciences,​ 5(1): 73-94</​P>​
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