December 1982
Western Journal of Agricultural Economics
are at an exploratory phase of the develop-
ment of a model which will allow us to esti-
mate food demand, production and food re-
tail price equations and to simultaneously
measure market power and mark-up ratios.
The model yields as special cases the perfect-
ly competitive and perfect collusion (or
monopoly) situations. We have found that
the use of duality theory has been useful in
the derivation of the empirical model and
comparative static analysis.
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