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To: CheshireTheCat

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4118566

Findings: Replicating the CDC study shows similar results; however, incorporating a larger sample and longer period showed no significant relationship between mask mandates and case rates. These results persisted when using regression methods to control for differences across districts. Interpretation: School districts that choose to mandate masks are likely to be systematically different from those that do not in multiple, often unobserved, ways. We failed to establish a relationship between school masking and pediatric cases using the same methods but a larger, more nationally diverse population over a longer interval. Our study demonstrates that observational studies of interventions with small to moderate effect sizes are prone to bias caused by selection and omitted variables. Randomized studies can more reliably inform public health policy.


1,864 posted on 05/31/2022 3:36:48 AM PDT by smileyface ("The illuminati's whole philosophy demands the use, abuse, sacrifice and consumption of children.")
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1,955 posted on 05/31/2022 2:26:52 PM PDT by CheshireTheCat ("Forgetting pain is convenient.Remembering it agonizing.But recovering truth is worth the suffering")
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