Link to Pacific Standard magazine blog post.
Theme: Forget density, even educational attainment. Migration is what matters.
Subject Article: "WHAT'S EATING LITTLE PORTUGAL? FORGET AFRICENTRIC SCHOOLS: TORONTO’S PORTUGUESE COMMUNITY HAS THE HIGHEST DROPOUT RATE IN THE CITY."
Other Links: 1. "How Migration Makes the World Brainier."
2. "Naypyidaw-on-Hudson: Isolated capitals are more corrupt."
Postscript: I'm toying with the idea that migration is more important than education. Knowledge transfer makes the world go round. Innovation is a function of geographic mobility.