The building of brands for agricultural commodities which make distinc
tions in quality requires the development of efficient contractual mec
hanisms and the coordination between the farmers and the following sta
ges. The contractual moral standards of the farmers, however, are quit
e contradictory Yet apart from successful programs, the program holder
s report again and again about the failure of brands for agricultural
commodities, maintaining that the farmers are not readily enough integ
rating themselves into those contracts and that the way these farmers
see themselves and their striving for independence prevent the buildin
g of competitive brand programs. Opposed to that, the following thesis
- based on a normative model, on organizational, social and structura
l modifications of that model, as well as on simulated calculations -
shows that the contractually organized supply of agricultural brands f
ails either because the contracts do not provide a maximum efficiency
or because too much is expected of the consumer's willingness to pay t
he price for such brands. The results of the model furnish us with ind
ications concerning further efficient structuring possibilities - poss
ibilities helping to build productive contractual systems in agrarian
marketing.