Sizing up cities (podcast)

Here's a short podcast on the difficulty of sizing up cities (by More or Less: Behind the Stats Podcast - duration of 11 mins).

“Which are the world’s biggest cities, and what are their populations? Two simple questions that we discover are surprisingly difficult to answer. Plus, has the world got heavier or lighter since the industrial revolution?” 

ps. It is hard to belive in Chinese official statistics.


Related links:

• Urban shrinkage in Leipzig (Germany)
• Urban shrinkage in Germany and the USA
• Shrinking Cities: Urban Challenges of Globalization
• I didn't know there is a 'Shrinking Cities International Research Network (SCIRN)' !