UC Davis Agricultural and Resource Economics

Etienne Guigue, CREST, Institut Polytechnique de Paris

Markups and Markdowns in the French Dairy Market

Date and Location

Friday, February 10, 2023, 10:30 AM - 12:00 PM
ARE Library Conference Room, 4101 Social Sciences and Humanities


Separately measuring firm buyer and seller power is important for policy-making, but challenging. In this paper, we suggest a new methodology to do so and apply it to French dairy processors. These firms exert buyer power when purchasing raw milk, and seller power when marketing dairy products. The analysis is based on plant-level data on dairy firms, with observations on prices and quantities of raw-milk input by origin and output by product from 2003 to 2018. We rely on a production function approach to estimate total margins. The existence of a commodity, (i) substitutable as an input or as an output, and (ii) exchanged on global markets where firms are price-takers, allows us to separately estimate firm-origin markdowns and firm-product markups. We show this methodology can also be useful in other contexts, with more limited data. Markdown estimates imply that dairy firms on average purchase raw milk at a price 16% below its marginal contribution to their profits, while markup estimates indicate that firms sell dairy products at a price exceeding their marginal costs by 41%. Our results show substantial variations in the exploitation of buyer and seller power across firms, products, and time. We analyze how exogenous farmer and processor cost shocks pass through the supply chain. Processors partially absorb such shocks by adjusting markups and mark- downs, thus smoothing variations in farmer revenues. It further implies that 65% of subsidies are currently diverted from farmers due to processor buyer power. A price floor on raw milk could be an alternative welfare-improving policy.

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