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Shape Persistence in Elicited Subjective Crop Yield Probability Density Functions AgEcon
Clop-Gallart, M. Merce; Juarez-Rubio, Francisco.
The shape persistence of a crop yield probability density function (PDF) was studied by using two variants of the Visual Impact Method (VIM) to elicit subjective estimations by farmers. In one variant ten weights were used to describe the PDF and in the other variant the farmer chose the number of weights. Results were compared directly and by means of Weibull distributions fitting, with evidence being obtained in favor of methodological persistence and the equivalence of the two estimation methods.
Tipo: Conference Paper or Presentation Palavras-chave: Subjective crop yield PDF elicitation; Visual impact method; Methodological persistence; Crop Production/Industries.
Ano: 2008 URL: http://purl.umn.edu/44128
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Elicitation of Subjective Crop Yield PDF for DSS Implementation AgEcon
Clop-Gallart, M. Merce; Juarez-Rubio, Francisco.
The aim of this research is to establish the persistence of annual crop yield point values subjective estimates, and the coherence and reliability of subjective crop yield probability density functions (PDF) elicited from a series of interviews carried out on a wide group of farmers, and then to determine whether they should be included or not in a decision support system (DSS). Three different elicitation techniques were used: a) The Two Step PDF estimation method b) Triangular distribution c) Beta distribution Although the results are noteworthy, further studies should be carried out to perfect the aforementioned techniques before crop yield PDF's are used in decision making processes.
Tipo: Conference Paper or Presentation Palavras-chave: Decision support systems; Subjective crop yield PDF elicitation; Two step PDF estimation method; Triangular and beta distributions; Crop Production/Industries.
Ano: 2005 URL: http://purl.umn.edu/24561
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Differences in qualitative aspects of broiler meat demand in Spain. Part 1: Home Consumption AgEcon
Colom, Ale; Gosalvez, M.; Clop-Gallart, M. Merce; Averos, X.; Juarez, L.; Gosalvez, L..
To know the Spanish homes reasons of purchasing broiler meat a survey of 1,000 families, by means of a 13 question interview, was carried out during 2007. After processing the information it was concluded that Spanish families purchase food an average of 2.34 times/week, 95% of which do not exceed 100 € and, with the exception of more than 400 € purchases, in more than 90% of which broiler meat accounts for more than 14% of the spent budget. Broiler meat is bought near home, in butcher’s shops or supermarkets, with purchases via telephone or the internet being marginal. The main declared benefits of consuming broiler meat were the low fat content, being a healthy meat, and being proper in a healthy diet. Surprisingly, 72% of interviewees did not see any...
Tipo: Conference Paper or Presentation Palavras-chave: Home demand; Broiler; Meat Consumption; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety.
Ano: 2008 URL: http://purl.umn.edu/43545
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