Agreed. Right now the best way to handle that is to filter your analysis in a way that accounts for confounding variables. So in the example you gave, you'd run

Agreed. Right now the best way to handle that is to filter your analysis in a way that accounts for confounding variables. So in the example you gave, you'd run the Desktop OS vs. Compensation analysis then filter for Country == USA only. That's a pretty rough way to deal with that issue. Ideally you'd run a regression that more subtly takes country into account, without losing data. Unfortunately that's not possible in Statwing (currently...).