For standard calibration, this paper shows that the optimal price, in a model with Calvo form of price stickiness and strategic complementarities, is only defined for annualised trend inflation rates of under 5.5%. This critical inflation rate is below the average inflation rate over recent...

We provide new evidence on price rigidity at the product level based on microdata underlying the Swiss consumer price index from 2008 to 2020. We find that the frequency o f price changes has increased over the last decade, particularly among products where collection switched to online prices,...