We are suffering from a levels problem in public health science. Individual differences at L1 are not the way to model public policy decisions. Population aggregates at L2 are. Understanding fixed & random effects b/w the two levels becomes crucial. Atomistic fallacy is rampant. pic.twitter.com/GeMKJJ3BeG
— J.D. Haltigan, PhD (@JDHaltigan) January 12, 2022
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