You may have seen posts on social media calling for an economic boycott tomorrow. If you haven’t, activists are targeting large brands, such as Walmart, Amazon, and Wholefoods asking consumers not to spend money for 24 hours because they’re unhappy with growing financial inequality. They say if you do have to shop, support a local business. People’s Union USA is the group behind the action. According to its website, it’s not a political party but a movement of people. Maurice Schweitzer is a professor at Wharton who researched the effectiveness of economic boycotts. I asked him, do they work?