In this contribution a general approach for the derivation of economic weights is given. Economic weights have been derived for two perspectives: maximizing profitability per cow (cow profitability) maximizing profitability per unit of product (product p rofita b ility). Product profitability is equal to costs per unit of product in a one product situation. The economic weights for the two perspectives are identical when product output is restricted. This also holds in a situation with multiple products and one with variation in herd life . Fixed enterprice costs only influence the economic weights when product profitability is used in a situation without a restriction on input or output. Influences of perspective and restrictions are illustrated for a situation where profitability is a function of lactation yield of fat and protein and herd life . Using product profitability the economic weight of fat or protein results from a reduction in costs per unit of product and a change in the ratio of fat to protein. It is concluded that product profitability should be taken as perspective in deriving economic weights.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume XIV. Dairy cattle genetics and breeding, adaptation and conservation., , 78–85, 1990
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