Say for example, i want to do a search on Accountants in London(UK), and i want to determine which accountant is the most prominent one. i.e. that has actual influence on the industry.
How would you go about doing this? Is there a key metric i should be searching for? Please bear in mind, whatever formula you come up with, i must be able to do it for free, without having to subscribe to any kind of "companies database" etc.
Thank you kindly