Regression-Discontinuity Design - Institute for Policy Research
Regression-Discontinuity Design - Institute for Policy Research
Regression-Discontinuity Design - Institute for Policy Research
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Interpretation of Treatment Effects <strong>for</strong><br />
Sharp RD <strong>Design</strong>s<br />
• Treatment effect is<br />
interpreted as the average<br />
treatment effect at the<br />
cutoff ( s ).<br />
• This is in contrast to what<br />
is usually estimated by the<br />
RE, which is the average<br />
treatment effect ( ATE ).<br />
• Without further<br />
assumptions about<br />
functional <strong>for</strong>m, s<br />
generalizes only to this<br />
cutoff point on this<br />
assignment variable.<br />
• Cutoff may or may not be<br />
of policy or practical<br />
relevance.<br />
Treatment effects <strong>for</strong> RDD vs. RE<br />
RD data from Shadish et al. (2011)
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