Sometimes when I complain about the horrible state of the art in social science, and especially in human resource management, senior colleagues tell me that it's near impossible to convince companies to do proper large randomized trials. Perhaps, but if that's how science needs to get done, then work on convincing them. Fortunately, there are some who had success. I showcase this particular study not because of content interest to readers of this blog, but because I want to show that such studies are indeed done from time to time. I suggest researchers summarize these when approaching companies to convince them to let researchers do experiments.