“…Online markets are not necessarily more integrated than offline markets (Duch‐Brown et al, 2021) and costs of price adjustment still exist online (Böheim et al, 2021). As e‐commerce matures, however, markets seem to become more efficient, which manifests itself in higher share of uniform prices within retailers (Ater & Rigbi, 2018; DellaVigna & Gentzkow, 2019) as well as in lower price rigidity (Böheim et al, 2021; Gorodnichenko & Talavera, 2017; Gorodnichenko et al, 2014). For multichannel retailers, price differences across the channels are mostly driven by geographical price dispersion in their offline stores, and the share of uniform prices is higher if the product can be found on Amazon (Cavallo, 2017, 2018).…”