Your eyes aren’t playing tricks on you. One of these men is the Rock, the actor. The other? A wax version of the Rock, aka a “Synthetic Control,” crafted to look like… well, the first guy. Personally, I prefer the real Rock—especially in that disaster movie where California plunges into the ocean thanks to a massive earthquake—but I digress. This podcast dives into an equally obscure data science technique, “synthetic control,” that helps prove causality when a clean A/B test isn’t possible.