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| Registros recuperados: 12 | |
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| Jansson, Torbjorn; Bakker, Martha M.; Boitier, B.; Fougeyrollas, A.; Helming, John F.M.; van Meijl, Hans; Verkerk, P.J.. |
| In order to quantify the effects of a comprehensive set of policies on land use, interaction between sectors needs to be accounted for, while maintaining a high level of detail for each sector. This calls for a combination of sector specific and sector wide models. This paper describes such a modelling system, with emphasis on the linking of the models to a coherent system. Five sectors of significant importance for land use are modelled individually: Forestry, agriculture, urban land use, transport infrastructure, and tourism. All models are connected as sub-modules to an economy-wide partial econometric model. In addition, a land cover model is used to disaggregate land use down to 1km grid resolution. The linking of such a diverse set of models in a... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Model linking; Sustainable land use; Cross sector modelling; Iterative recalibration; Land Economics/Use. |
| Ano: 2008 |
URL: http://purl.umn.edu/44169 |
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| Jansson, Torbjorn; Bakker, Martha M.; Le Mouel, P.; Schirmann-Duclos, D.; Verhoog, A. David; Verkerk, P.J.. |
| In this paper we investigate the impacts of abolishing the Common Agricultural Policy (CAP) for the post-2013 European Union (EU) financial perspective and the impacts of re-investing the released funds on research and development (R&D). We apply a linked system of models to analyze the impacts for the EU member states. The linked system consists of five land-use sector models (agriculture, forestry, urban area, tourism and transport infrastructure), which are connected to a macro-econometric model. Additionally, a land cover model is used to disaggregate land use countries to a 1 km² grid. Three scenarios are analysed. In the “baseline” currently decided policies are assumed to be continued until 2025. In the “tax rebate” scenario agricultural support... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: CAP reform; Economical growth; Land use; Agricultural and Food Policy; Land Economics/Use. |
| Ano: 2008 |
URL: http://purl.umn.edu/43640 |
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| Jansson, Torbjorn. |
| In this article, it is shown how the parameters of a transport model can be estimated in a way that, in contrast to previously used methods, utilizes regional prices as well as of trade costs. The proposed method uses bi-level programming to minimize a weighted least squares' criterion under the restriction that the estimated parameters satisfy the Kuhn-Tucker conditions for an optimal solution of the transport model. We use Monte-Carlo simulations to trace out some properties of the estimator and compare it with a traditional calibration method. The analysis shows that the proposed technique estimates prices as well as trade costs more efficiently. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Public Economics. |
| Ano: 2005 |
URL: http://purl.umn.edu/19473 |
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| Jansson, Torbjorn. |
| In this article, it is shown how the parameters of a transport model can be estimated in a way that, in contrast to previously used methods, utilizes observations of regional prices as well as of trade costs. The proposed method uses bi-level programming to minimize a weighted least squares criterion under the restriction that the estimated parameters satisfy the Kuhn-Tucker conditions for an optimal solution of the transport model. We use Monte-Carlo simulations to trace out some properties of the estimator and compare it with a traditional calibration method. The analysis shows that the proposed technique estimates prices as well as trade costs more efficiently. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Spatial equilibrium; Transport model; Bi-level programming; Research Methods/ Statistical Methods; C15; F11. |
| Ano: 2005 |
URL: http://purl.umn.edu/18787 |
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| Renwick, Alan W.; Jansson, Torbjorn; Verburg, Peter H.; Revoredo-Giha, Cesar; Britz, Wolfgang; Gocht, Alexander; McCracken, Davy. |
| This paper examines the potential impact of agricultural and trade policy reform on land-use across the EU focussing particularly on the issue of land abandonment. Using a novel combined application of the well established CAPRI and Dyna-CLUE models it estimates the extent of change across Europe under removal of Pillar 1 support payments and trade liberalisation. Overall, it is estimated that around 8 per cent less land will be farmed under these reforms than under the baseline situation. However, some regions, areas and farm types face more significant reductions. The reforms are particularly felt on livestock grazing farms situated in the more marginal areas of Europe, which also coincide with areas of high nature value. Therefore, farmland biodiversity... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural Policy; Land Use Change; Land Abandonment; Agricultural and Food Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/108772 |
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| Jansson, Torbjorn. |
| The primary objective of this paper is to estimate behavioural parameters of the quadratic regional supply models in the modelling system CAPRI, using the time series data in the CAPRI database. A secondary objective is to replace the constant yields of the original model by functions that depend on input use. Due to lack of statistical robustness, the second objective is not achieved, thus yields remain constant. A Bayesian highest posterior density estimator is developed to address the primary objective. After discarding regions with insufficient data, parameters for up to 23 crop production activities with related inputs, outputs, prices and behavioural functions are estimated for 165 regions in EU-15. The results are systematically compared to the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Bayesian estimation; Errors-in-variables; PMP; Research Methods/ Statistical Methods; Q11; C32. |
| Ano: 2007 |
URL: http://purl.umn.edu/57030 |
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| Helming, John F.M.; van Meijl, Hans; Woltjer, Geert B.; Jansson, Torbjorn; Nowicki, Peter; Tabeau, Andrzej A.. |
| Following the paradigm for reforming the current CAP, the first objective of this study is to give insights into the economic impact of post-2013 CAP measures at different levels of aggregation (e.g. EU, Member State and region). The post-2013 CAP measures included are directed towards income for the farmers, competitiveness, valuable areas and ecosystem services. The second objective is to analyse the impact of a scenario that combines the above mentioned post-2013 CAP measures. This study can be seen as a first attempt to quantify the transition to a CAP with more targeted measures at the European level and reveals considerable methodological and data challenges. A key finding is that the impact of the various measures is very different with regard to... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2011 |
URL: http://purl.umn.edu/114550 |
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| Registros recuperados: 12 | |
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