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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Example<br />
Cocaine Project<br />
• Included 500 patients addicted to cocaine<br />
• Purpose was to show whether intensive in‐patient<br />
rehabilitation showed better improvement <strong>for</strong> patients as<br />
opposed to outpatient care<br />
• Assignment variable was a composite score based on the<br />
following: 1) employment and legal status; 2) family<br />
relationship and recovery; 3) alcohol and drug history; 4)<br />
psychological status..<br />
• Patients with scores above 60 assigned to inpatient rehab;<br />
patients with scores less than 40 assigned outpatient<br />
rehab; those with scores 40‐60 in randomized trial.<br />
• Used RD‐RE design b/c randomized experiment was<br />
consider neither ethical nor feasible.