One methodology, occupation: Occupations that were most disproportionately psychopathic were CEO,lawyer,media,salesperson, surgeon,journalist,police officer,clergyperson,chef,civil servant.
papers.ssrn.com/sol3/papers.cf…
suggest an allure of big cities for psychopaths (Geher 2018). While population density is one operationalization of that latter hypothesis, the percentage living in an urban area is likely the better test