A Historical View of Trump

Migration—temporary and permanent—is turning out to be one of the magic bullets for global economic growth: Ricardo Hausmann (2013): The Tacit-Knowledge Economy: "Know how resides in brains, and emerging and developing countries should focus on attracting them, instead of erecting barriers to skilled immigration. Because knowledge moves when people do, they should tap into their diasporas, attract foreign direct investment in new areas, and acquire foreign firms if possible.... Recent research at Harvard University’s Center for International Development (CID) suggests that tacit knowledge flows through amazingly slow and narrow channels. The productivity of Nuevo León, Mexico, is higher than in South Korea, but that of Guerrero, another Mexican state, resembles levels in Honduras. Moving knowledge across Mexican states has been difficult and slow. It is easier to move brains than it is to move tacit knowledge into brains, and not only in Mexico. For example, as the CID’s Frank Neffke has shown, when new industries are launched in German and Swedish cities, it is mostly because entrepreneurs and firms from other cities move in, bringing with them skilled workers with relevant industry experience.... Knowledge moves when people do...