“…Despite negative externalities associated with economies of scale, its seems that "bigger is better" to a certain point if it has to do with increasing economics outputs in the short term, even in Mexico (Ahrend et al, 2014, p. 8;Kim, Yoonhee & Zangerling, Bontje, 2016, p. 17). A recent Asian work found also that size increase productivity in Chinese cities, meaning they still have room for urban growth, but highlight the specific threshold (the famous inverted "U" shape) where productivity promoted by population concentration begins to decline, marking the moment where government should redistribute population in order to avoid diseconomies of scale (Chen & Zhou, 2017;Shen, Chen, Yang, & Zhang, 2019 Regardless of this, other recent studies (McCann & Acs, 2011) challenge the "bigger is better" statement, by saying that most productive cities in the world are the ones who have a population under 3 million inhabitants, followed then by cities up to 7 million, and thus, suggesting mid-sized cities are more productive. Other studies advise that the size-productivity relationship is highly context dependent (Frick & Rodríguez-Pose, 2018).…”