Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
Abbreviated Interrupted Time-Series - Institute for Policy Research
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Problematically<br />
• Different combinations of these have different<br />
distributions, e.g.,<br />
– Binomial <strong>for</strong> counts with fixed n of trials<br />
– Poisson <strong>for</strong> rates with variable n of trials<br />
• HLM usually assumes normally distributed data.<br />
– One can change this, but<br />
– It isn’t clear HLM how can allow different distributions <strong>for</strong><br />
different studies in the same meta‐analysis.