"Fixies per person" in a geographic region isn't a "raw number".
I don't get your point with the example, for those values I get "fixies per capita" of 1 in Manhattan, and 2 in Brooklyn. That clearly states that there are twice as many fixies per person in Brooklyn as there are in Manhattan.
If you also normalize based on Manhattan, you'd get 100 and 200 which say exactly the same thing but with more zeroes and no longer being "per capita".
Sorry if that was unclear. The original comment stated that using per capita in this manner would be "inaccurate", but you can't compare Manhattan and Brooklyn simply by comparing the total number. What I was trying to explain in response was that Priceonomics didn't have "fixies per person" data, only the total fixies for sale in a region (the "raw number"). Without using per capita, these results could easily be misconstrued.
I don't get your point with the example, for those values I get "fixies per capita" of 1 in Manhattan, and 2 in Brooklyn. That clearly states that there are twice as many fixies per person in Brooklyn as there are in Manhattan.
If you also normalize based on Manhattan, you'd get 100 and 200 which say exactly the same thing but with more zeroes and no longer being "per capita".