The objective of this paper is to provide an alternative model which can be used to test for oligopsony market power applying plant-level data. For this purpose, we took into account empirical studies and specific developments in the Hungarian dairy industry and specified a model that provides useful benchmarks for an econometric test of market power. The results of the econometric analysis show that the effects from policy changes in Hungary, as well as from plant specific issues are highly statistically significant, and produce evidence suggesting the exercise of oligopsony market power in the Hungarian dairy industry.