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In reality most larger US metros are cosmopolitan, the US is an extremely diverse country compared to most of the rest of the world. Even metros that we consider relatively homogeneous like Seattle, Denver and Minneapolis have a similar level of diversity as cities like Paris and Berlin.
It is easier to name the cities in the US that aren't cosmopolitan, because there are only a few of them.
What is the most diverse metropolitan area? (All data is from American FactFinder)
For the 2000 census, the US census released a diversity index (http://www.census.gov/population/cen...ensr01-104.pdf) calculating the statistical diversity of each county in the United States based on the 8 broad ethno-racial demographic groups seen in the census. If you look on the 4th page of the link above, the census demographers use simple mathematics to determine how they got the index to begin with:
1) Square the percentage of each group analyzed
2) Subtract that number from 1.00 (total diversity)
The range of diversity is from .00 (no diversity at all) to 1.00 (total diversity). For the sake of making our lives easier, I will only analyze five statistically significant groups: i) White Non-Hispanics ii) Black Non-Hispanics iii) Hispanics iv) Asian Non-Hispanics v)Two or more races
If you want to calculate it based on diversity within groups (like Italian Americans, Irish Americans, Indian Americans, etc.), just add those percentages based on the American Community Survey Link above and do the same thing.
TOP 11 LIST OF MOST DIVERSE METROPOLITAN AREAS IN TERMS OF RACIAL GROUPS (out of the top 11 populated metro areas): 1) San Francisco (.687)
2) Houston (.676)
3) Los Angeles (.664)
4) Miami (.663)
5) Dallas (.618)
6) Chicago (.605)
7) Washington (.604)
8) Atlanta (.599)
9) New York (.595)
10) Philadelphia (.494)
11) Boston (.346)
There. If you want to calculate your metro area/city/county/etc. or add more variables, just do what I did in the above. Just remember that the formula is
Note: if San Jose is not on the list, then Philly doesn't deserve to be on the list. Philly is not any more cosmopolitan or important than SJ. They're very similar, only Philly is old, and SJ is new.
I guess Montclair beat me too it. But I thought it was common knowledge that SF was the most racially diverse city in the US
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