The main emphasis of the present study is the empirical analysis of buyer market power of the Ukrainian milk processing industry on the market for raw milk. For an econometric analysis of pricing behaviour on the Ukrainian market for raw milk a sectoral, comparative-static structural model, based on the New Empirical Industrial Organization (NEIO) framework has been constructed. The model consists of a short-term supply function for raw milk and a first order condition for profit maximizing raw milk demand of the milk processing enterprises. The results of the econometric estimation of the model do not show any evidence for the existence of market power in the Ukrainian milk processing industry on the national level for the estimation period January 1996 to December 2003. However, these results do not exclude existence of market power on the regional level.