https://www.sciencedaily.com/releases/2023/08/230802105833.htm

Randomized experiments split participants into groups by chance, with one undergoing an intervention and the other not. But in real-world situations, they can't always be done. Companies might not want to use the method, or such experiments might be against the law.

Developed by a researcher at The University of Texas at Austin, the new tool called two-step synthetic control adapts an existing research workaround, known as the synthetic control method.