What explains apparent price rigidity over the business cycle? This paper shows that price fluctuations may be hidden in prices of add ons. Using 10 years of extended warranty data from a nationwide Canadian retailer, we show that extended warranty prices respond strongly to changes in local...

What explains apparent price rigidity over the business cycle? This paper shows that price fluctuations may be hidden in prices of add ons. Using 10 years of extended warranty data from a nationwide Canadian retailer, we show that extended warranty prices respond strongly to changes in local...

We study how within-store price variation changes with inflation, and whether households exploit it to attenuate the inflation burden. We use micro price data for food products sold by 91 large multi-channel retailers in ten countries between 2018 and 2024. Measuring unit prices within narrowly...

Do firms respond to cost shocks by reducing the quality of their products? Using microdata from a large Russian retailer that refreshes its product line twice-yearly, we document that higher quality products are more profitable than lower quality ones, but that the number of high quality...

This paper looks at the disruption in food supply chains due to COVID-19 induced economic shutdown in India. We use a novel dataset from one of the largest online grocery retailers to look at the impact on product stock-outs and prices. We find that product availability falls by 10 percent for...

How often do online retailers change prices? Are there any differences in their price rigity? I collected and analysed more than 4 million daily prices of online grocery retailers from Czechia during the unprecedented period between January 2020 and April 2021. There are substantial differences...

We study how within-store price variation changes with inflation, and whether households exploit it to attenuate the inflation burden. We use micro price data for food products sold by 91 large multi-channel retailers in 10 countries between 2018 and 2024. Measuring unit prices within narrowly...

We use Canadian home scanner data to study household food inflation rates during periods of low and high inflation. We find that during the post-pandemic surge in inflation, the actual inflation rates experienced by different households varied more widely. Low-income households faced higher...

Does the internet increase competition? To address this question, I exploit two institutional details unique to Germany: (1) Some municipalities received glass fibre cables that cannot be upgraded to DSL; I use these municipalities as a treatment group with reduced online competition. (2) German...

This paper investigates the short- and medium-term effects of the deregulation of shopopening hours legislation on retail employment in Germany. In 2006, the legislative competence was shifted from the federal to the state level, leading to a gradual deregulation of shop opening restrictions in...