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	Provedor de dados AgEcon (3) Autor Benfica, Rui M.S. (1) Boughton, Duncan (1) Margolis, Michael (1) Naevdal, Eric (1) Ranjan, Ram (1) Tschirley, David L. (1) Mais... Palavra-chave Threshold effects (3) Risk and Uncertainty (2) Belief dynamics (1) C21 (1) C61 (1) Contract farming (1) Critical zone (1) Crop Production/Industries (1) D1 (1) Ecological hysteresis (1) Environmental Economics and Policy (1) Groundwater dependent ecosystems (1) Household income. (1) J43 (1) L1 (1) Mixed risk spaces (1) Optimal control (1) Q12 (1) Q20 (1) Q30 (1) Mais... Tipo do documento Conference Paper or Presentation (2) Working or Discussion Paper (1) Ano 2008 (1) 2006 (1) 2004 (1) País United States (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Safe Minimum Standards in Dynamic Resource Problems -- Conditions for Living on the Edge of Risk AgEcon Margolis, Michael; Naevdal, Eric. Safe Minimum Standards (SMSs) have been advocated as a policy rule for environmental problems where uncertainty about risks and consequences are thought to be profound. This paper explores the rationale for such a policy within a dynamic framework and derives conditions for when SMSs can be summarily dismissed as a policy choice and for when SMSs can be defended as an optimal policy based on standard economic criteria. We have determined that these conditions can be checked with quite limited information about damages and risks. In order to analyze the SMSs in a dynamic setting, we have developed a method for solving optimal control problems where the state space is divided into risky and non-risky subsets. Tipo: Working or Discussion Paper Palavras-chave: Safe minimum standards; Optimal control; Critical zone; Threshold effects; Mixed risk spaces; Risk and Uncertainty; C61; Q20; Q30. Ano: 2004 URL: http://purl.umn.edu/10568 Resilience in Ecology and Belief AgEcon Ranjan, Ram. Replaced with revised version of paper 06/18/08. Former title: Non-Linearity in Belief and Environmental Risk Dynamics Tipo: Conference Paper or Presentation Palavras-chave: Belief dynamics; Ecological hysteresis; Water scarcity; Groundwater dependent ecosystems; Threshold effects; Environmental Economics and Policy; Resource /Energy Economics and Policy; Risk and Uncertainty. Ano: 2008 URL: http://purl.umn.edu/5999 Interlinked Transactions in Cash Cropping Economies: The Determinants of Farmer Participation and Performance in the Zambezi River Valley of Mozambique AgEcon Benfica, Rui M.S.; Tschirley, David L.; Boughton, Duncan. This paper investigates the determinants of participation and performance of tobacco contract farmers, and the effects of participation on overall crop and household incomes in the Zambezi Valley of Mozambique. We test the existence of threshold effects in land holdings and educational attainment to identify the types of farmers that benefit. Several results stand out. First, participation in the schemes is driven by factor endowments, asset ownership and alternative income opportunities, and very little by demographic factors. Second, we find no returns to education in tobacco; this result is consistent with previous research in Mozambique but surprising in an agronomically demanding crop like tobacco. Third, there appear to be economies of scale in... Tipo: Conference Paper or Presentation Palavras-chave: Contract farming; Selection bias; Treatment effects; Threshold effects; Household income.; Crop Production/Industries; C21; D1; L1; J43; Q12. Ano: 2006 URL: http://purl.umn.edu/25244 Registros recuperados: 3 Primeira ... 1 ... Última

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