Yep, totally agree that this would be tricky! There’d be a lot of details to think through. I would note that Vivalt does run regressions where, e.g., the kind of organization implementing the program (government vs NGO) is included as a covariate, and the coefficient on sample size doesn’t change much (-0.011 vs −0.013 in the single linear regression; see table 7, p. 31).
Yep, totally agree that this would be tricky! There’d be a lot of details to think through. I would note that Vivalt does run regressions where, e.g., the kind of organization implementing the program (government vs NGO) is included as a covariate, and the coefficient on sample size doesn’t change much (-0.011 vs −0.013 in the single linear regression; see table 7, p. 31).