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	Provedor de dados AgEcon (9) Autor Mack, Gabriele (9) Mann, Stefan (6) Ferjani, Ali (5) Gennaio, Maria-Pia (3) Mohring, Anke (3) Zimmermann, Albert (3) Calabrese, Chiara (1) Flury, Christian (1) Kranzlein, Tim (1) Pfefferli, S. (1) Rieder, Peter (1) Rossier, Ruth (1) Mais... Palavra-chave Farm Management (3) Agricultural and Food Policy (2) Livestock Production/Industries (2) Research Methods/ Statistical Methods (2) Structural change (2) Agent definition (1) Agent-based model (1) Agentendefinition (1) Agribusiness (1) Alpine region (1) C16 (1) C53 (1) C61 (1) Demand and Price Analysis (1) Dynamic simulation (1) Efficiency (1) Effizienz (1) Einkommensmaximierung (1) Energie-Input (1) Energy use (1) Mais... Tipo do documento Conference Paper or Presentation (8) Journal Article (1) Ano 2011 (2) 2010 (1) 2009 (2) 2008 (1) 2007 (1) 2005 (1) 2003 (1) Mais... País United States (9) Idioma Inglês (5) Alemão (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 9 Primeira ... 1 ... Última Können Produktionsentscheidungen als Investitionsentscheidungen modelliert werden? AgEcon Mann, Stefan; Mack, Gabriele; Ferjani, Ali. Interviews with Swiss farmers lead to the hypotheses that production decisions, also in crop growing, are not made annually, but similarly to investment decisions in the long run. This hypothesis is backed by non-parametric time-series analysis for Switzerland and Germany. This creates a theoretical basis for combining Positive Mathematical Programming with flexibility constraints in optimization models. Results of the forecasting model SILAS show that forecasting quality is improved through this approach. Tipo: Journal Article Palavras-chave: Flexibility constraints; Production decisions; Optimization models; Forecasting quality; Farm Management. Ano: 2003 URL: http://purl.umn.edu/98078 Entspricht die Schweizer Milchproduktion bei erhöhtem Kraftfuttereinsatz noch den Erwartungen der Bevölkerung? AgEcon Mack, Gabriele; Rossier, Ruth. Dieser Beitrag zeigt auf, wie die modellbasierte agrarökonomische Forschung Umfrageergebnisse über die Erwartungen der Bevölkerung an die Agrarpolitik in ihre Analysen mit einbeziehen und für eine verbesserte Beurteilung von politischen Maßnahmen nutzen kann. Am Beispiel verschiedener Politikszenarien (Zollsenkungen auf Kraftfuttermittel in der Schweizer Milchviehhaltung) wird eine Verknüpfung normativer und empirischer Ergebnisse dargestellt und ein Index für die Übereinstimmung einer Maßnahme mit den Erwartungen der betroffenen Bevölkerung gebildet. Die Ergebnisse zeigen, daß die heutigen Kraftfutterpreise für die Milchviehhaltung den Erwartungen der Schweizer Bevölkerung sowie ausgewählter Bevölkerungsgruppen (Produktivitätsorientierte, Ökologiesensible... Tipo: Conference Paper or Presentation Palavras-chave: Modellbasierte Politikanalyse; Erwartungsprofil; Ökonomische und ökologische Indikatoren Index-Bildung; Kraftfuttereinsatz; Milchviehhaltung; Livestock Production/Industries; Research Methods/ Statistical Methods. Ano: 2009 URL: http://purl.umn.edu/53275 Modeling the Liberalisation of the Milk Market in Switzerland AgEcon Flury, Christian; Mack, Gabriele; Rieder, Peter; Pfefferli, S.. Switzerland aims to liberalise the milk market by 2011. This will result in distinctive changes in the basic conditions for agriculture. The impacts of the liberalisation are investigated with a composite model obtained by combining an optimization model for the agricultural sector and a dynamic simulation model for the milk and meat market. The calculations with the composite model indicate that the milk price depends strongly on the phasing out of market support, while the abolition of milk quotas in 2009 is less decisive. An introduction of a dairy cow premium leads to a higher milk production, especially with abolished milk quotas. In this case the European milk price level represents the lower limit for the milk price in Switzerland. Compared to the... Tipo: Conference Paper or Presentation Palavras-chave: Dynamic simulation; Sectoral optimisation; Milk market; Milk quota; Agribusiness; C53; C61; O21; Q13; Q18. Ano: 2005 URL: http://purl.umn.edu/24507 Farm Entry Policy and Its Impact on Structural Change Analysed by and Agent-based Sector Model AgEcon Mack, Gabriele; Mohring, Anke; Zimmermann, Albert; Gennaio, Maria-Pia; Mann, Stefan; Ferjani, Ali. The Swiss agent-based model (SWISSland) claims to depict as realistically as possible the 50 000 family farms comprising the whole of Swiss agriculture in all their heterogeneity as regards farm and cost structures as well as farm decision-making behaviour and interactions, with the aim of improving the simulation and forecasting of structural change in agriculture. With the linking of different methods and recorded data, there is a marked increase in the quality of the assessment of policy consequences. Simulations are shown for policy measures which affect only farm entry by cutting socially motivated direct payments for young operators. Tipo: Conference Paper or Presentation Palavras-chave: Agent-based model; Sector model; Farm entry; Structural change; Farm Management. Ano: 2011 URL: http://purl.umn.edu/114374 Modelling structural change in the agricultural sector – An Agent-based approach using FADN data from individual farms AgEcon Mohring, Anke; Zimmermann, Albert; Mack, Gabriele; Mann, Stefan; Ferjani, Ali; Gennaio, Maria-Pia. The development of multi-agent models for agriculture has allowed the inclusion of farm decision-making behaviour and interactions in the simulation of smaller agricultural regions. Important methodological impact for this has come in particular from scientists from Germany. Currently under construction, the SWISSland model claims to depict as realistically as possible the 50,000 family farms comprising the whole of Swiss agriculture in all their heterogeneity as regards farm and cost structures as well as farm decision behaviours, with the aim of improving the simulation and forecasting of structural change. This paper describes methodological aspects in the formation of the agent population by combining various data sources such as accounting and spatial... Tipo: Conference Paper or Presentation Palavras-chave: Structural change; Swiss agriculture; Multi-agent model; Agent definition; Linear optimization; Agricultural and Food Policy; Farm Management; Land Economics/Use. Ano: 2010 URL: http://purl.umn.edu/61094 Evaluation of political control instruments for the Swiss alpine region AgEcon Calabrese, Chiara; Mack, Gabriele. This paper analyses different direct payments system for the Swiss alpine region based on the multi-agent model SWISSland. Moreover, the future demand and management of the alpine pastures are simulated under different scenarios until 2020. In the model, agents are representing existing summer farms and are able to interact with each other. The results imply that the current direct payment system for the Swiss alpine region is effective and able to maintain a stable development until 2020. Since the land management in the alpine region is the activity that provides public goods, it would be reasonable to enforce payments that maximize the area of summered land. A change to contributions coupled to the surfaces could achieve the desired management of the... Tipo: Conference Paper or Presentation Palavras-chave: Multi-agent models; Policy analysis; Simulation; Alpine region; Agricultural and Food Policy; C16; Q18.. Ano: 2011 URL: http://purl.umn.edu/99370 Defining elasticities for PMP models by estimating marginal cost functions based on FADN Data - the case of Swiss dairy production AgEcon Mack, Gabriele; Mann, Stefan. The Swiss agricultural sectoral information and forecasting system (SILAS) is based on the PMP standard approach. The marginal cost functions are estimated by exogenous elasticities. Due to the lack of empirical data the elasticities were set for all activities to unity. Based on total milk production costs of FADN farms, regional supply functions were estimated. The results are used to adjust the marginal cost functions of organic and non-organic dairy cow activities in the model SILAS to the empirically estimated functions. The results show that the marginal cost functions in the sectoral model are in general a bit steeper than in the FADN estimations, when elasticities by the value one are applied. Major differences between organic and non-organic milk... Tipo: Conference Paper or Presentation Palavras-chave: Marginal cost function; Milk production costs; PMP-based sectoral model; Demand and Price Analysis; Livestock Production/Industries. Ano: 2008 URL: http://purl.umn.edu/6694 Multidisziplinäre Agentendefinitionen für Optimierungsmodelle AgEcon Mohring, Anke; Zimmermann, Albert; Mack, Gabriele; Mann, Stefan; Ferjani, Ali; Gennaio, Maria-Pia. Mit der Entwicklung von Multiagentenmodellen für die Landwirtschaft konnten betriebliche Entscheidungsverhalten und Interaktionen in die Simulation von kleineren Agrarregionen einbezogen werden. Wichtige methodische Impulse dazu kamen insbesondere von Wissen-schaftlerinnen und Wissenschaftlern aus Deutschland. Das sich im Aufbau befindende Modell SWISSland erhebt den Anspruch, die 50 000 Familienbetriebe der gesamten Schweizer Landwirtschaft in ihrer Heterogenität bezüglich Betriebs- und Kostenstrukturen sowie Verhal-tensweisen möglichst realitätsnah abzubilden, mit dem Ziel, die Simulation und Prognose des Strukturwandels zu verbessern. Dieser Beitrag beschreibt methodische Aspekte bei der Bil-dung der Agentenpopulation unter Verwendung verschiedener... Tipo: Conference Paper or Presentation Palavras-chave: Strukturwandel; Schweizer Landwirtschaft; Multi-Agentenmodell; Agentendefinition; Lineare Optimierung; Research Methods/ Statistical Methods. Ano: 2009 URL: http://purl.umn.edu/53273 HOW CAN THE ENERGY USE IN SWISS AGRICULTURE BE ASSESSED IN ECONOMIC AND ECOLOGICAL TERMS? AgEcon Mack, Gabriele; Ferjani, Ali; Kranzlein, Tim; Mann, Stefan. Replaced with revised version of paper 12/05/07. Tipo: Conference Paper or Presentation Palavras-chave: Energie-Input; Einkommensmaximierung; Mehrzieloptimierung; Effizienz; Energy use; Income maximisation; Multi-objective programming; Efficiency; Resource /Energy Economics and Policy. Ano: 2007 URL: http://purl.umn.edu/7599 Registros recuperados: 9 Primeira ... 1 ... Última

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