predict BMI for non–college graduates (n = 258) are roughly equal to zero for college graduates, and very similar results are shown for the simulated environment (90 % and 94 %, respectively). Again, the difference is very slight, with no clear evidence that these are different from a random environment. In other words, although some SNPs fall within zones 2, 4, 5, and 7, their presence does not necessarily provide support for the diathesis-stress or the social push perspectives. It is possible that the environment is systematically causing SNPs to operate differently across the environments, but differentiating real GxE signals from those due to chance is difficult to achieve using traditional methods and existing data sources.
