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There are allegations that poultry integrators in the Philippines exercise both buying and selling power as concentration ratio is relatively high, few brands exist, and operations are highly integrated from production to marketing. On the other hand, there are also allegations that large food retailers exercise market power as they aggressively expand and increase market share in the retail food industry. This study employs a combination of time series and New Empirical Industrial Organization approaches to testing market power. Results show that poultry integrators may have buying but not selling power. They appear to dominate retailers in the supply chain.
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Larry N. Digal (2010) studied this question.
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