Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/5289
Título: Data confession in the portuguese EDM
Autor: Costa, Leonardo
Palavras-chave: Water
Agricultural economics
Elasticities
Positive mathematical programming
Maximum entropy
Data: 2008
Editora: Faculdade de Economia e Gestão da Universidade Católica Portuguesa
Citação: COSTA, Leonardo - Data confession in the portuguese EDM. Working paper, n.º 9. 7 p.
Resumo: A dual profit model is used to characterize the Entre Douro e Minho (EDM) region agriculture. The data comes from budgets for twelve representative farms. Positive Mathematical Programming (PMP is applied. First, shadow prices of fixed inputs are obtained for each farm from a linear program (LP) forcing base year (1994) net output and fixed input allocations. Second, the Maximum Entropy (ME) technique is used to recover the restricted profit functions. The model purely reproduces observed net output and fixed input data. A short run profit function is derived for the region from aggregation of the model. The corresponding long run profit function is also derived. The profit model reveals an inelastic response to prices in the short run, and a more elastic response in the long run. Nitrogen and water appear as complements. The inelasticity of nitrogen response to its own price precludes taxing nitrogen to control its use. In contrast, pricing water is an effective strategy, not only to control water use but also nitrogen use. The Water Framework Directive (WFD) recommends both strategies.
Descrição: Este trabalho resulta da apresentação efectuada pelo autor no International Symposium Environment 2010: Situation and Perspectives for the European Union, Porto, Portugal, 6-10 May 2003
URI: http://hdl.handle.net/10400.14/5289
Versão do Editor: http://ideas.repec.org/p/cap/wpaper/092008.html
Aparece nas colecções:FEG - Documento de trabalho / Working Paper

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