“…A search in the Web of Science All Databases (Web of Science, 2019) and Scopus (Scopus, 2019) databases reveals that the Kaldor law is considered in several regional analysis, however a limited number of references were found for Portugal and Spain. Around the world, the Kaldor developments have been considered, for instance, for the Sub-Saharan African countries (Ssozi & Bbaale, 2019), Italy (Davanzati, Patalano, & Traficante, 2019), Mexico (Reyes, 2019), Portugal (Martinho, 2019), Asian and Latin American countries (Di Meglio, Gallego, Maroto, & Savona, 2018), Saudi Arabia (Almosabbeh & Almoree, 2018), Brazil (Nassif, Feijo, & Araujo, 2018) and China (McCombie, Spreafico, & Xu, 2018).…”