Do Retailers Price Gouge During Supply Shocks?

Johannes Brinkmann and Nikhil Datta
Additional contact information
Johannes Brinkmann: Department of Economics and CAGE, University of Warwick
Nikhil Datta: Department of Economics and CAGE, University of Warwick and CEP, London School of Economics

CAGE Online Working Paper Series from Competitive Advantage in the Global Economy (CAGE)

Abstract: Large supply shocks often raise concerns that retailers exploit rising costs to increase markups. We study the oil-price shock following Russia's invasion of Ukraine using wholesale fuel prices, near-universe daily retail prices across Great Britain, and more than 200 million precisely geolocated searches from a major fuel-price comparison platform. Despite fuel prices rising by 37% over the preceding 21 months with essentially no change in search, the abrupt post invasion increase triggered a more than twentyfold surge in daily search while retail margins contracted sharply. An event-study design shows that this shock-induced search increase causally reduced retail prices and margins, with 95th- versus 5th-percentile exposure implying an 8% margin reduction at the peak. The implied loss to retailer margins peaked at £5.2 million per week, around £650 per station. We rationalise these findings with a model in which large, rapid price increases raise consumer attention and price sensitivity, intensifying competition and compressing margins. More broadly, supply shocks can therefore change not only firms' costs but also the demand conditions governing how those costs are passed through. Consistent with the model's additional predictions, pass-through is approximately complete and symmetric before the invasion, but lower and temporarily exhibits a pronounced rockets-and-feathers pattern afterwards

Date: 2026
References: Add references at CitEc
Citations:

Downloads: (external link)
https://warwick.ac.uk/fac/soc/economics/research/c ... tions/wp821.2026.pdf

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:cge:wacage:821

Access Statistics for this paper

More papers in CAGE Online Working Paper Series from Competitive Advantage in the Global Economy (CAGE) Contact information at EDIRC.
Bibliographic data for series maintained by Jane Snape ().