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	Provedor de dados AgEcon (2) Autor Mitchell, Paul D. (1) Suedekum, Jens (1) Palavra-chave Increasing Returns (2) Crop Production/Industries (1) Damage Control (1) Damage Function (1) Economic Geography (1) Environmental Economics and Policy (1) F4 (1) Functional Response (1) J6 (1) Labor Mobility (1) Labor and Human Capital (1) Migration (1) Pest Economics (1) R1 (1) Regional Unemployment (1) Risk Reducing Input (1) Wage Curve (1) Mais... Tipo do documento Conference Paper or Presentation (1) Working or Discussion Paper (1) Ano 2004 (1) 2001 (1) País United States (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última ADDITIVE VERSUS PROPORTIONAL PEST DAMAGE FUNCTIONS: WHY ECOLOGY MATTERS AgEcon Mitchell, Paul D.. Economic analyses of pests typically assume damage is either additively separable from pest free yield or proportional to it. This paper describes the ecological assumptions required for additive and proportional damage functions to demonstrate that both specifications are reasonable. Ecological research supports a proportional damage function for competitive pests such as weeds, while for insect pests the appropriate damage function depends on the level of pest free yield. Theoretical analysis identifies differences between additive and proportional damage functions in terms of the impact of pest control on output variance and the concavity of output in the pest control input. Tipo: Conference Paper or Presentation Palavras-chave: Pest Economics; Damage Function; Damage Control; Risk Reducing Input; Increasing Returns; Functional Response; Crop Production/Industries; Environmental Economics and Policy. Ano: 2001 URL: http://purl.umn.edu/20775 Increasing Returns and Spatial Unemployment Disparities AgEcon Suedekum, Jens. Regional unemployment rates in the European Union (EU-15) reveal a core-periphery structure. Large "core" regions in the middle of the continent have low unemployment rates, whereas excessive mass unemployment is predominantly found in the peripheral regions at the outside borders of EU-15. This geographical pattern of unemployment rates follows the pattern of GDP per capita. That is, the regions with low (high) unemployment rates on average have comparatively high (low) real income levels. In this paper we try to understand this stylised fact with the help of a theoretical model that builds on two strings in the literature: the recent trade and location theories (like the ´new economic geography´) and the ´wage curve´. Standard models of the new location... Tipo: Working or Discussion Paper Palavras-chave: Regional Unemployment; Economic Geography; Increasing Returns; Wage Curve; Migration; Labor Mobility; Labor and Human Capital; R1; F4; J6. Ano: 2004 URL: http://purl.umn.edu/26358 Registros recuperados: 2 Primeira ... 1 ... Última

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