Here are some notes from Phil Weiss on the 2016 Markel Omaha meeting:
https://www.dropbox.com/s/7gh3j9g02l398gp/Phil%20Weiss'%202016%20Markel%20Omaha%20Meeting%20Notes.pdf?dl=0 (https://www.dropbox.com/s/7gh3j9g02l398gp/Phil%20Weiss'%202016%20Markel%20Omaha%20Meeting%20Notes.pdf?dl=0)