“A company can outperform rivals only if it can establish a difference that it can preserve. It must deliver greater value to customers or create comparable value at a lower cost, or do both … delivering greater value allows a company to charge higher average unit prices.”

Michael E Porter, strategy visionary

“In business, barriers to entry are required to generate superior returns … by definition, only sustainable barriers to entry can support sustainably outstanding performance … If we use the term strategic to describe an activity that is designed to enhance the long-term value of a business, then strategy is exclusively about establishing or reinforcing barriers to entry.”

Jonathan A. Knee, Bruce C. Greenwald, Ava Seave – The Curse of the Mogul