Friday, February 27, 2015

Monday, February 23, 2015

Greek bailout rap

Thursday, February 19, 2015

Saturday, February 7, 2015

Top Megacities in 2015

There is wide discrepancy in the sources for population, so I made a chart.  There are 31 megacities in the world today if London is included and Shenzhen is excluded (part of Pearl River Delta)




Most Populous Urban Areas in the World











Rank City
Economist [1]
Worldbank [2]
Demographia [3]
CityPopulation .de [4]
Wikipedia [5]
1 Pearl River Delta
41.8

41.8
NA Guangzhou-Foshan

20.6 34.3
NA Guanghzou, China 9.6


NA Foshan, China 6.7



NA Dongguan, China 7.1
8.4

NA Shenzhen, China 10.2
12.1 12.3

Total Pearl River Delta 33.6 41.8 41.1 46.6 41.8







2 Tokyo, Japan 36.8 31.8 37.8 39.4 37.2
3 Jakarta, Indonesia 9.6 23.4 30.5 27.4 26.7
4 Seoul, South Korea 9.8 15.9 23.5 24.2 25.4
5 Delhi, India 21.9
25.0 25.7 22.8
6 Shanghai, China [6] 20.0 24.2 23.4 30.2 21.8
7 Manila, Philippines 11.9 16.5 24.1 22.8 21.2
8 Karachi, Pakistan 14.1
22.1 23.6 20.9
9 New York, US 18.4
20.6 21.9 20.7
10 Sao Paulo, Brazil 19.7
20.4 21.6 20.6
11 Mexico City, Mexico 20.1
20.1 22.4 20.0
12 Beijing, China 16.2 16.7 21.0 20.3 18.2
13 Mumbai, India 19.4
17.7 22.8 17.3
14 Osaka, Japan 19.5 12.2 17.4 17.8 17.2
15 Moscow, Russia 10.5
16.2 16.8 15.8
16 Cairo, Egypt 16.9
15.6 16.5 15.1
17 Los Angeles, US 12.2
15.1 17.4 15.1
18 Tehran, Iran 8.1
13.5 13.5 14.7
19 Kolkata, India 14.3
14.7 15.8 14.6
20 Bangkok, Thailand 8.2 9.6 15.0 15.1 14.5
21 Dhaka, Bangladesh 14.7
15.7 17.0 14.4
22 London, UK 9.7
10.2 14.1 9.6
23 Buenos Aires, Argentina 14.2
14.1 15.8 13.8
24 Istanbul, Turkey 12.7
13.3 14.2 12.9
25 Lagos, Nigeria 10.8
13.1 13.7 12.1
26 Rio de Janeiro, Brazil 12.4
11.7 12.6 11.6
27 Paris, France 10.5
10.9 11.2 10.9
28 Tianjin, China 9.5 8.8 10.9 11.1 9.3
29 Nagoya, Japan 9.2
10.2 10.4 10.2
30 Kinshasa, Dem Rep Congo 9.4
11.6 10.3 9.4
31 Bangalore, India 8.3
9.8 10.1 9.0







NA Bogota, Colombia 8.5
9.0 9.3 9.9
NA Lima, Peru 9.0
10.8 9.9 9.4
NA Chennai, India 8.5
9.7 9.8 9.2
NA Chicago, IL 8.6
9.2 9.8 9.1
NA Chengdu, China 6.2 8.3 10.4 9.0 8.4
NA Lahore, Pakistan 7.5
10.1 9.8 8.0
NA Chongqing, China 11.2 5.0 7.2 6.9 6.6
NA Suzhou, Jiangsu, China 4.0
5.2
4.4


Notes:


[1] http://www.economist.com/node/21642053?fsrc=scn/fb/wl/bl/dc/dailychart


[2] http://www.worldbank.org/content/dam/Worldbank/Publications/Urban%20Development/EAP_Urban_Expansion_full_report_web.pdf


[3] http://demographia.com/db-worldua.pdf


[4] http://citypopulation.de/world/Agglomerations.html


[5] http://en.wikipedia.org/wiki/List_of_urban_areas_by_population


[6] Does Shanghai include Suzhou? Yes in sources 2 and 4, no in the others.


Friday, February 6, 2015

Top Megacities in 2030

A megacity has 10 million or more inhabitants, and there will be 44 of them in 2030.  About 9% of the entire world's population will reside in one of these cities. Here is the list:
  1. Tokyo, Japan 37.3m
  2. Delhi, India 35.4m
  3. Shanghai, China 30.6m
  4. Beijing, China 27.5m
  5. Mumbai, India 27.3m
  6. Dhaka, Bangladesh 26.8m
  7. Karachi, Pakistan 24.3m
  8. Cairo, Egypt 24.1m
  9. Mexico City, Mexico  23.7m
  10. Sao Paulo, Brazil 23.4m
  11. Lagos, Nigeria 23.4m
  12. Osaka, Japan 20.1m
  13. New York, US 19.8m
  14. Kinshasha, Congo 19.4m
  15. Kolkata, India 18.7m
  16. Guangzhou, China 17.4m
  17. Chongqing, China 17.3m
  18. Buenos Aires, Argentina 16.9m
  19. Istanbul, Turkey 16.6m
  20. Manila, Philippines 16.4m
  21. Tianjin, China 14.5m
  22. Bangalore, India 14.5m
  23. Rio de Janeiro, Brazil  14.1m
  24. Jakarta, Indonesia 13.6m
  25. Chennai, India 13.6m
  26. Los Angeles, CA 13.2m
  27. Lahore, Pakistan 12.7m
  28. Shenzhen, China 12.6m
  29. Hyderabad, India 12.5m
  30. Moscow, Russia 12.2m
  31. Lima, Peru 12.1m
  32. Bogota, Colombia 11.9m
  33. Paris, France 11.8m
  34. Johannesburg, South Africa 11.5m
  35. Bangkok, Thailand 11.4m
  36. London, UK 11.4m
  37. Dar es Salaam, Tanzania 10.3m
  38. Ahmadabad, India 10.3m
  39. Seoul, South Korea 10.0m
  40. Luanda, Angola 10.0m
  41. Chengdu, China 10.0m
  42. Ho Chi Minh City, Vietnam 10.0m
  43. Tehran, Iran 10.0m
  44. Chicago, IL 9.9m
Source: http://www.economist.com/node/21642053?fsrc=scn/fb/wl/bl/dc/dailychart
http://www.maximizingprogress.org/2015/02/urbanization-map-rise-of-megacity.html

Update: I don't think this is accurate.  Greater Los Angeles has more than 18 million people, and Seoul has over 23 million.

Sunday, February 1, 2015