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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Threat to SCV<br />
• When a treatment is implemented slowly and<br />
diffusely, as in the alcohol warning label study, the<br />
researcher has to specify a time point at which the<br />
intervention “took effect”<br />
– Is it the date the law took effect?<br />
– Is it a later date (and if so, did the researcher<br />
capitalize on chance in selecting that date)?<br />
– Is it possible to create a “diffusion model” instead<br />
of a single date of implementation?