000126768 001__ 126768
000126768 005__ 20180122221801.0
000126768 037__ $$a1007-2016-79432
000126768 041__ $$aen_US
000126768 084__ $$aQ10
000126768 084__ $$aQ15
000126768 084__ $$aQ50
000126768 084__ $$aQ57
000126768 245__ $$aImprovement of a bio-economic mathematical programming model in the case of on-farm source inputs and outputs
000126768 260__ $$c2012
000126768 269__ $$a2012
000126768 300__ $$a20
000126768 336__ $$aConference Paper/ Presentation
000126768 520__ $$aA signicant part of crop productions is not marketed and can be totally (fodders
and pastures) or partly (cereals) used on-farm. Regarding inputs, Nitrogen fertilizers
are also not only provided by the market, but they are signicantly on-farm provided
by livestock. When outputs and inputs are related through technical dose-response
functions, like Nitrogen (N)-yield functions, the optimal gross margin is easily com-
puted at the plot level, when input and output are marketed. In this case, market
prices are required.
The question addressed in this article is how to assess the optimal values when
one crop production (respectively one input) is entirely on-farm used (respectively
on-farm produced). We propose a simple iterative computation method aiming at
replacing market prices by shadow costs. We apply this method to a large set of the
bio-economic agricultural supply model AROPAj, which covers a large range of agri-
cultural activities over the European Union. This method allows us to keep ecient
the basic linear framework of the model even when the yield functions make it non
000126768 542__ $$fLicense granted by Elizabeth Hilber (hilb0033@umn.edu) on 2012-06-29T20:42:47Z (GMT):

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000126768 650__ $$aResearch Methods/ Statistical Methods
000126768 6531_ $$aBio-economic farm model
000126768 6531_ $$aMathematical programming
000126768 6531_ $$aOn-farm source
000126768 6531_ $$aShadow prices
000126768 700__ $$aAghajanzadeh-Darzi, Parisa
000126768 700__ $$aJayet, Pierre-Alain
000126768 700__ $$aDomingues, M.J.P
000126768 773__ $$d2012
000126768 8564_ $$s502160$$uhttps://ageconsearch.umn.edu/record/126768/files/Aghaj.pdf
000126768 887__ $$ahttp://purl.umn.edu/126768
000126768 909CO $$ooai:ageconsearch.umn.edu:126768$$pGLOBAL_SET
000126768 912__ $$nSubmitted by Elizabeth Hilber (hilb0033@umn.edu) on 2012-06-29T20:46:31Z
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  Previous issue date: 2012
000126768 982__ $$gInternational Association of Agricultural Economists2012 Conference, August 18-24, 2012, Foz do Iguaçu, Brazil
000126768 980__ $$a1007