“…There are different methods to represent these six indicators. Certain bodies of literature on bilateral trade have used the six variables as separate measures (Álvarez et al, 2018;Lio & Hu, 2009;Martínez-Zarzoso & Márquez-Ramos, 2018;Méon & Weill, 2005). Other studies have constructed dummy variables based on whether the institutional measure is positive or negative (i.e., above or below the median for all countries), or by summing or averaging the scores of all six indicators into one overall measure (de Groot et al, 2004;de Groot, Linders, & Rietveld, 2005;Linders et al, 2005).…”