“…A similar observation has been made in several prior studies with a more global focus (e.g.,Sebri and Zaccour 2017, p. 125; Talukdar et al 2002, p. 102).4 Initially, b-convergence was used primarily in the macro-economics field (see, for example, Islam 2003 for a review). More recently, the application domain has expanded considerably with, among others, studies on the convergence of car prices(Goldberg and Verboven 2005), retail gasoline prices(Suvankulov et al 2012), retail payment methods(Martikainen et al 2015), or consumers' revealed preferences for car attributes(Silver 2010).K. Gielens, M.G.…”