Stephan's Tuesday Picks

• Roger Martin: Michael Porter's three great strategy contributions (Medium)
• One CEOs radical fix for corporate troubles: Purge the bosses (WSJ)
• Philip Kotler and Giuseppe Stigliano on redefining retail (McKinsey)
• Dynamic pricing is coming for everything (Vox)
• This startup promised to help fashion go green. Brands didn't want to pay for it (WSJ)