Figure 2
The distribution of occupations in US metropolitan areas is universal.
(A) Frequency distribution for several cities with different population sizes only differ in their amplitude, which is set by city size and the extent to which they probe rare occupations. The horizontal grey line shows the minimum number of professions (thirty) reported. (B) The rank-probability distributions for different cities collapse on each other when adjusted for city size (total employment). The yellow line shows the fit of the universal form to 
, where we introduces a scale 
at small ranks. The black line is the f of f(i)/Ne in the absence of saturation.
