Stephan's Monday Picks

• Inside Shopify's vision of an e-commerce system to rival Amazon (Financial Post)
• Stop & Shop workers are on strike at over 240 stores in New England (NYT)
• What the grocery stores holding their own against Amazon are doing right (HBR)
• The nutrition study the $30B supplement industry doesn't want you to see (Ars Technica)
• Ulta Beauty's Canadian expansion plan adds more competition in crowded sector (Globe and Mail)