Consulta: creatorFacets:"Calatrava-Leyva,   Javier"
Registros recuperados: 7
Data/hora: 12/06/2024 03:13:34

Analysis of the Adoption of Irrigation Technologies Under Uncertain Water Availability
Provedor de dados: 31
Autores: Escribano,   Maria Jesus; Calatrava-Leyva,   Javier.
This paper analyses the adoption process of water-conserving irrigation technologies by a risk averse farmer in a context of uncertain water availability. Firstly, it is analytically shown that the increase in water efficiency that the new technology allows results in a decrease in the cost of the effective irrigation water applied, as well as in an increase in both effective water applied and crop production. It is also concluded that the optimal amount of irrigation water applied depends on individual risk preferences of the producer, on the variance and asymmetry of the cost of water applied, and on the elasticity of the marginal productivity of the effective water applied. Lastly, it is theoretically shown that an increase in the level of uncertainty...
Tipo: Conference Paper or Presentation
Palavras-chave: Irrigation technology; Adoption; Risk; Water availability; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy; Q25; Q12; D81.
Ano: 2005
URL: http://purl.umn.edu/24672

Modelling Spot Water Markets Under Uncertain Water Supply
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Garrido,   Alberto.
Water availability in semiarid regions usually exhibits patterns of extreme variability. Even in intensively controlled basins, some users are subject to low levels of water reliability, and more vulnerable to periods of extreme scarcity. To reduce their risk exposure more flexible instruments, such as voluntary exchanges of water among users, are required. Recent changes in the Spanish water Law have given an initial impulse to allow for leases of water use rights. Properly designed and monitored, this instrument provides some flexibility to water management, and may increase the economic use efficiency as well as mitigate the adverse economic effects of droughts. This paper looks at the risks and uncertainty dimensions of water markets, which have not...
Tipo: Conference Paper or Presentation
Palavras-chave: Uncertainty; Farm modelling; Water markets; Water supply; Resource /Energy Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/24820

Analisis del efecto de los mercados de agua sobre el beneficio de las explotaciones, la contaminacion por nitratos y el empleo eventual agrario
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Colmenero,   Alberto Garrido.
RESUMEN: La evidencia disponible sobre los efectos externos de los mercados de agua actualmente en funcionamiento es contradictoria. Algunos trabajos demuestran que el intercambio de agua reduce la contaminación derivada de los sistemas productivos del regadío, mientras que otros concluyen lo contrario. El uso combinado de tasas sobre el input contaminante y la implantación de un mercado de agua plantea incentivos a los productores con resultados ambiguos, entre otras razones porque agua y fertilización no son sustitutivos. El objetivo de este trabajo es analizar el efecto conjunto del establecimiento de un hipotético mercado de agua entre agricultores y un impuesto sobre el nitrógeno sobre la rentabilidad de las explotaciones, la contaminación por...
Tipo: Journal Article
Palavras-chave: Resource /Energy Economics and Policy; Q25; Q13.
Ano: 2001
URL: http://purl.umn.edu/28738

Adoption of Soil Conservation Practices in Olive Groves: The Case of Spanish Mountainous Areas
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Franco,   Juan Agustin; Gonzalez-Roa,   Maria del Carmen.
This paper presents some results from a survey carried out in 2004 among 223 olive tree farmers from mountainous areas in the Spanish Southern provinces of Granada and Jaen regarding the adoption of soil conservation and management practices. Olive tree groves in mountainous areas are subject to a high risk of soil erosion and have to incur in higher costs of soil conservation. This results in greater difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil conservation; Technology adoption; Resource /Energy Economics and Policy; Q12; Q24.
Ano: 2005
URL: http://purl.umn.edu/24661

Análisis de alternativas para la eliminación de la sobreexplotación de acuíferos en el Valle de Guadalentín
Provedor de dados: 31
Autores: Calatrava-Leyva,   Javier; Guillem,   Amanda; Martinez-Granados,   David.
In this paper we analyse the economic impact of alternative water management instruments that allow addressing the problem of non-renewable groundwater pumping in the aquifers of the Guadalentín Valley (southeast Spain). Their impact is assessed using a partial equilibrium mathematical programming model that maximises the farm net margin resulting from the use of the available water resources for irrigation in the area. Our results show that the buyback of groundwater pumping rights is the option with the greatest public budgetary cost and economic impact. On the contrary, the combination of an environmental tax on groundwater pumping and the substitution of groundwater by subsidised desalinised water allow eliminating aquifer overdraft in the area while...
Tipo: Article
Palavras-chave: Groundwater; Water economics; Water demand; Mathematical programming; Irrigation; Agricultural and Food Policy; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy; Q25; C61.
Ano: 2011
URL: http://purl.umn.edu/120197

Adopción y difusión de prácticas de no laboreo en el olivar de la provincia de Granada
Provedor de dados: 31
Autores: Franco,   Juan Agustin; Calatrava-Leyva,   Javier.
En este trabajo se analiza el proceso de adopción del no laboreo en el olivar de la provincia de Granada utilizando información procedente de un sondeo realizado en 2005-2006 a 215 olivicultores. Se analiza en primer lugar el proceso de difusión agregada de las prácticas de no laboreo realizadas en la zona mediante la estimación de varios modelos de difusión temporal. A continuación se identifican, mediante la estimación de dos modelos probit, algunos factores que influyen en la adopción de dichas prácticas. Los resultados obtenidos muestran cómo las prácticas de no laboreo son realizadas por el 90% de los agricultores. Su difusión ha sido intensa desde mediados de los noventa, predominando el efecto imitación, basado en la interacción entre los...
Tipo: Journal Article
Palavras-chave: Erosión; No laboreo; Olivar; Adopción de tecnologías; Difusión de tecnologías.; Agricultural and Food Policy; Q12; Q24; C50.
Ano: 2010
URL: http://purl.umn.edu/99605

Adoption of Soil Erosion Control Practices in Southern Spain Olive Groves
Provedor de dados: 31
Autores: Franco,   Juan Agustin; Calatrava-Leyva,   Javier.
This paper presents results from a survey carried out in 2005 among 147 olive tree farmers from the Alto Genil River Basin in Southern Spain regarding the adoption of soil conservation and management practices. Olive tree groves in South-eastern Spain's mountainous areas are subject to a high risk of soil erosion and have to incur in high costs of soil conservation. This results in great difficulties to comply with cross-compliance and to benefit from agri-environmental schemes. Our main objectives are to analyse the current level of adoption of soil conservation practices and to analyse which socio-economic and institutional factors determine such adoption. Three Probit models are estimated. Dependant variables are three different soil conservation...
Tipo: Conference Paper or Presentation
Palavras-chave: Olive groves; Soil erosion; Soil conservation; Cross compliance; Crop Production/Industries; Q12; Q24.
Ano: 2006
URL: http://purl.umn.edu/25787