> I'm not seeing any info about whether testing rates were consistent between schools with mask mandates and schools without. The paper tells you that the Bost

> I'm not seeing any info about whether testing rates were consistent between schools with mask mandates and schools without. The paper tells you that the Boston and Chelsea districts were outliers in terms of testing in the first sentence of the Results. But it's essential to the claims of the original paper, so you should look there, and cross-apply the same criticism. If you can't prove that testing rates were consistent across schools, how can you make the claim of a 30% increase in positivity? (Hint: Cowager et al. provide the data buried in a supplement. They show that testing practices, in fact, were neither consistent nor stable across time. Both violate the requirements for applying the statistical method used in the original paper.)