"The secret of Costco’s success revealed! (hint: no MBAs need apply)", https://washingtonmonthly.com/2013/06/09/the-secret-of-costc...

"... Costco does not hire business school graduates—thanks to another idiosyncrasy meant to preserve its distinct company culture. It cultivates employees who work the floor in its warehouses and sponsors them through graduate school." https://www.bloomberg.com/news/articles/2013-06-06/costco-ce...