Stephan's Wednesday Picks

• Walgreens tests digital cooler doors with cameras to target you with ads (WSJ)
• Robotic milkers and an automated greenhouse: Inside a high-tech small farm (NYT)
• America's biggest grocery chain says customers are wary about future (Bloomberg)
• Coffee price slump leaves farmers making less than a cent a cup (Reuters)
• Giant Food stores will place robotic assistants at 172 locations (Washington Post)