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Resumen de la sesión
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SES05-9h-1b: MEDIO AMBIENTE, BIOECONOMÍA Y CAMBIO CLIMÁTICO-B
Hora:
Jueves, 05/09/2019:
9:00 - 10:30

Presidente de la sesión: Melania Salazar-Ordóñez, Universidad de Córdoba
Lugar: aula 2
Aulario 1, 84 plazas

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Ponencias

DOES CONSEQUENTIALITY AFFECT FARMERS’ WILLINGNESS TO ACCEPT FOR PARTICIPATING IN INCENTIVE-BASED SCHEMES? A CHOICE EXPERIMENT APPROACH

Anastasio J. Villanueva, Macario Rodríguez-Entrena, Rubén Granado-Díaz

WEARE-Water, Environmental and Agricultural Resources Economics. Universidad de Córdoba, España

Recent literature using stated preference methods provides evidence on the influence on welfare measures of respondents’ beliefs on to what extent their responses would be consequential, i.e. they potentially impact decision-making. Whereas studies have shown that consequentiality affects welfare measures in demand-side environmental assessments using willingness-to-pay formats, evidence from the supply side using willingness-to-accept (WTA) formats are lacking. We investigate the impact of consequentiality in farmers’ WTA for participating in agri-environmental schemes (AES) through a consequentiality treatment randomly distributed among respondents embodied in a choice experiment (CE) approach. Our application focuses on AES participation in mountain olives groves in southern Spain, with the aim of improving the provision of ecosystem services. Results show that those farmers who faced the questionnaire with the treatment display significantly lower WTA for participating in AES, although differences in WTA seem to depend on the level of stringency of scheme requirements. This suggests that this type of surveys should account for consequentiality to avoid biased WTA estimates in this rapidly growing body of literature.



El sesgo hipotético en la valoración de activos ambientales. El Mar Menor y Franja Litoral Mediterránea de la Región de Murcia.

Erasmo I. López-Becerra, Francisco Alcón

Universidad Politécnica de Cartagena, España

La valoración económica ambiental permite otorgar un valor económico a la ganancia o pérdida de bienestar que una persona experimenta a causa de la mejora o daño de un activo ambiental. Para ello, distintas técnicas permiten inferir dicho valor analizando el comportamiento de los individuos en mercados hipotéticos. Los experimentos de elección destacan entre las técnicas de valoración más utilizadas en los últimos años. A pesar de las grandes ventajas de esta técnica, no están exentas de sesgos. Siendo el sesgo hipotético uno de los más importantes. Si la provisión y el pago por servicios ambientales son hipotéticos probablemente su valoración también lo será.

En este contexto, el objetivo del trabajo se centra en realizar un ejercicio de valoración de los beneficios derivados de la implantación del Plan de Gestión Integral de los Espacios Protegidos del Mar Menor y la Franja Litoral Mediterránea (PGIMMFLM) de la Región de Murcia, y evidenciar la existencia de un posible sesgo hipotético en la valoración. Para ello se emplea el enfoque basado en la predicción. Los resultados revelan la existencia de un sesgo hipotético que incrementa 2,8 veces el valor de los activos.



Mountain agricultural systems as providers of an environmental function: estimating the extra prices for olive oil

Anastasio J. Villanueva1, Melania Salazar-Ordóñez1,2, Macario Rodríguez-Entrena1

1WEARE-Water, Environmental, and Agricultural Resources Economics, Universidad de Córdoba; 2Departamento de Economía, Universidad Loyola Andalucía, España

There is a need to explore new mechanisms to enhance biodiversity provision in agricultural systems, especially because of the usual mechanisms (e.g. incentive-based) have proved to be ineffective in many contexts. Some of the most promising mechanisms are market-based instruments, such as eco-labelling. This falls within the so-called commodification of public goods, which involves the internalisation of public goods functions (such as biodiversity) through decentralised pricing mechanisms. This paper aims at estimating the minimum payments farmers are willing to accept (WTA) for changing towards more environmental-friendly practices to provide bird biodiversity jointly with olive oil. A discrete choice experiment was used for the case study of mountain olive growers in Andalusia (Southern Spain). The results show that the higher the level of provision of farmland biodiversity is, the higher are the farmers’ WTA, ranging from 0.185€/kg to 0.195€/kg olive oil. Additionally, low-yield farms show lower WTA compared to high-yield ones, indicating a higher competitiveness in providing olive oil jointly with biodiversity.



Analysis of Farmers’ Stated Risk Using Lotteries and Their Perceptions of Climate Change in the Northwest of Mexico

Miguel Angel Orduño Torres1, Zein Kallas2, Selene Ivette Ornelas Herrera3

1Institute for Research in Sustainability Science and Technology (IS-UPC), Polytechnic University of Catalonia, Barcelona, España; 2Center for Research in Agrofood Economy and Development (CREDA-UPC-IRTA), Castelldefels, Spain; 3Faculty of Mathematics and Statistics (FME-UPC), Polytechnic University of Catalonia, Barcelona, Spain

The risk attitude affects farmers' production and investment decisions. It is a factor related to their environmental attitudes and towards climate change (CC). The multiple price list (MPL) method was applied to identify the level of stated risk by farmers and subsequently related to their socioeconomic characteristics, environmental attitudes and CC' perceptions. The data was collected through a face-to-face survey of 370 farmers in irrigation district 076 in northwestern Mexico. The results showed a risk level of 0.32 according to the Constant Relative Risk Aversion (CRRA) coefficient, locating farmers of the region in a risk-averse group. The heterogeneity analysis showed that socioeconomic factors and perceptions of CC are related to the farmers´ stated risk. Farmers who are young women, with a tendency to use public support for structural investment, were shown to be risk-tolerant. Farmers considered floods, hail, diseases, pests, and weed growth incidences to be the most frequent weather patterns in the region.



 
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