“…Most studies in the related literature rely on nonhomothetic demands, or heterogeneity in consumer preferences/tastes (so as to capture vertically differentiated traded products), 3 Vertical differentiation can be traced back to Linder (1961) and Alchian and Allen (1964). For the related trade literature on vertical product differentiation see, among others, Falvey and Kierzkowski (1987), Flam and Helpman (1987), Motta et al (1997), Toshimutsu (2005), Iacovone and Javorcik (2010), Anderson and Schmitt (2010), Verhoogen (2008), Johnson (2012), Bastos and Silva (2010), Baldwin and Harrigan (2011), Fajgelbaum et al (2011), Kugler and Verhoogen (2012), Crozet et al (2012), Manova and Zhang (2012), Amiti and Khandelwal (2013), Antoniades (2015), Feenstra and Romalis (2014), Bacchiega et al (2016), Manova and Yu (2017).…”