If someone's interested in a more detailed discussion of this, here's a an out-of-copyright paper that turned up in a 2 minute literature search: https://www.js

If someone's interested in a more detailed discussion of this, here's a an out-of-copyright paper that turned up in a 2 minute literature search: https://www.jstor.org/stable/2972411 https://www.jstor.org/stable/2972411