We study how the city system is affected by the possibility for the members of the same cultural diaspora to interact across different cities. In so doing, we propose a simple two- city model with two mobile cultural groups. A localized externality fosters the productivity of individuals when...

India is at the cusp of a major urban transition. In less than twenty years, India's urban population is expected to nearly double from 377 million today to over 600 million. Indian cities already contribute an estimated two-thirds of India's GDP, and this number is expected to rise to 75% by...

Globally as well as in China, cities have contributed to most of the economic output and have accordingly given rise to most CO2 emissions. In particular, given unprecedented urbanization, cities will play an even greater role in shaping energy demand and CO2 emissions. Therefore, cities are the...