قارن الطرق

	تصميم الانحدار المتقطع متعدد الفترات	تصميم الانحدار الضبابي المتقطع
المجال	الاستدلال السببي	الاستدلال السببي
العائلة	Regression model	Regression model
سنة النشأة	2010s–2020s	2001
صاحب الطريقة	Cattaneo, Idrobo & Titiunik (foundations); extended by multiple authors for repeated-period settings	Hahn, Todd & van der Klaauw
النوع	Quasi-experimental causal inference	Quasi-experimental causal inference
المصدر التأسيسي	Cattaneo, M. D., Idrobo, N., & Titiunik, R. (2020). A Practical Introduction to Regression Discontinuity Designs: Foundations. Cambridge University Press.	Hahn, J., Todd, P., & van der Klaauw, W. (2001). Identification and Estimation of Treatment Effects with a Regression-Discontinuity Design. Review of Economic Studies, 68(1), 201-209.
الأسماء البديلة	multi-wave RD, repeated RDD, dynamic RD, multi-cutoff RDD	Fuzzy RD, Fuzzy RDD, Fuzzy RD Design, Imperfect RDD
ذات صلة	3	5
الملخص	Multi-period Regression Discontinuity Design extends the classic RDD to settings where a cutoff-based treatment is applied in multiple waves, across repeated time periods, or with varying thresholds. By pooling or comparing period-specific discontinuity estimates, researchers gain statistical precision and can examine how causal effects evolve or persist over time.	Fuzzy Regression Discontinuity Design (Fuzzy RDD) estimates causal effects when eligibility for a treatment is determined by a threshold on a running variable but actual take-up of that treatment is imperfect — some eligible units do not receive treatment and some ineligible units do. The cutoff acts as an instrument, and the estimand is a Local Average Treatment Effect (LATE) for compliers near the threshold.