The main difference between Einstein and typical management theories are, the former leaves it to the world to prove his theories experimentally, could be proved hundred years later and the later wants to prove it with statistical analysis however biased or inaccurate it could be..
Management professionals should not waste their time in trying to prove their theories with statistics, they should believe in their intuition and leave it to the world to test it out.. Right theories doesn't need any statistics and the readers will connect it with their own examples & statistics..
Peter Trucker's "Principles of effective executive" doesn't need any statistics and any reader can connect and relate the same easily to their lives..
So the next time someone ask you to prove your theories, tell them the readers will do it..