Yep and here is a useful calculation: https://en.wikipedia.org/wiki/Herfindahl%E2%80%93Hirschman_Index https://en.wikipedia.org/wiki/Herfindahl%E2%80%93Hirschma

Yep and here is a useful calculation: https://en.wikipedia.org/wiki/Herfindahl%E2%80%93Hirschman_Index https://en.wikipedia.org/wiki/Herfindahl%E2%80%93Hirschman_I....