Cities’ outsized proportion of global economy in 2025 and 2050

McKinsey projection for 2025:

Six hundred cities… are projected to generate more than 60 percent of global growth to 2025.

Dan Pelino’s projection for 2050 (emphasis mine):

70 percent of the world’s population will live in just 200 cities by the year 2050. And these cities will then boast 75 percent of the skilled labor in the world and 91 percent of the global economy.