Not seeing the survivor bias. It’s a sample of about a dozen, 30 years ago, all sampled again now. Different nationalities from different walks of life and ba

Not seeing the survivor bias. It’s a sample of about a dozen, 30 years ago, all sampled again now. Different nationalities from different walks of life and backgrounds, colocated for a few years in a third world country. What I could see is a few layers of selection bias, as in, expat children of expat parents that would work in third world and buy their children computers and put them in an expat middle school.