“…The vertical dimension of price transmission often represents highly complex relationships with vertical integration processes not visible to the researcher (Adjemian et al, 2016;Lan et al, 2022;von Cramon-Taubadel & Goodwin, 2021). The increasing use of nonlinear models-particularly representing regime changes-provide for the effect of such nonobservable mechanisms, especially under the form of transaction and processing costs, with significant nonlinear price dynamics turning as an indicator for market inefficiencies (Cakir, 2021;Mai et al, 2018). Despite the traditional focus on market power (McCorriston et al, 2001;Yu & Gould, 2019), the PT literature endeavors to offer further economic insights explaining food chains' inefficiencies, like the presence of adjustment costs (Chavas & Mehta, 2004), policy interventions (Brummer et al, 2009;Santeramo & Cioffi, 2012), the degree of perishability and storability of the products concerned (Santeramo, 2015;Santeramo & von Cramon-Taubadel, 2016) or product differentiation (Antonioli et al, 2019;Livat et al, 2019), among others.…”