“…Since then, scholars have endeavored to consolidate the theoretical and empirical literature to understand and explain the causes and effects of agglomeration (Babkin et al , 2017; Bayliss, 2007; Cruz and Teixeira, 2010; Duranton and Puga, 2004; Fujita and Mori, 2005; Hoover, 1948; Krugman, 1991; Malmberg and Maskell, 2002; Romanelli and Khessina, 2005; Skokan and Zotyková, 2014; Wixted, 2009; Zeibote and Muravska, 2018). However, these efforts found their main challenge in the conceptual heterogeneity embedded in the theory of agglomeration, which describes similar phenomena using different concepts (Duranton, 2011; Ortega-Colomer et al , 2016; Storper, 2009).…”