Stephan's Tuesday Picks

• Roger Martin: Surfaces concave and convex (Medium)
• Buying groceries at Shoppers Drug Mart? You'll pay a buck more for those chickpeas (Globe and Mail)
• Why a shabby luxury brand is hard to fix (WSJ)
• Why does a simple summer dress cost so much now (The Cut)
• Lululemon restructures product and brand teams (WSJ)