Credit Suisse Global Investment Returns Yearbook 2014
This popular yearly publication goes in depth on three different questions puzzling many investors. It doesn't provide you with an easy unambiguous answer: there is no such one. Instead the statistical analysis gives you the insight necessary to recognize accepted misconceptions and false evidence. The "Credit Suisse Global Investment Returns Yearbook" 2014 is no longer available on the CS website. You can try the above sequence on a search engine to retrieve a copy on any other site.