Compara mètodes

	Sèrie temporal interrompuda en la recerca educativa	Diferència en Diferències (Diff-in-Diff)
Camp	Inferència causal	Econometria
Família	Regression model	Regression model
Any d'origen	1979-2002	1994
Autor original	Shadish, Cook & Campbell (quasi-experimental design); Wagner et al. (segmented regression formalization)	Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment)
Tipus	Quasi-experimental causal inference	Causal inference / panel regression
Font seminal	Shadish, W. R., Cook, T. D., & Campbell, D. T. (2002). Experimental and Quasi-Experimental Designs for Generalized Causal Inference. Houghton Mifflin. ISBN: 978-0395615560	Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
Àlies	ITS in education, educational ITS, segmented regression in education, policy interrupted time series	diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff)
Relacionats	4	5
Resum	Interrupted time series (ITS) analysis is a quasi-experimental design that estimates the causal effect of an education policy or intervention by examining whether an outcome trend changes abruptly at the point of implementation. Applied to education, it is used to evaluate reforms, curriculum changes, testing policies, and school interventions using routinely collected longitudinal data without a randomised control group.	Difference-in-Differences is a causal-inference method that estimates the effect of an intervention by comparing how a treatment group and a control group change over time. Made famous by Card and Krueger's 1994 minimum-wage study and developed in Angrist and Pischke's Mostly Harmless Econometrics, it isolates the treatment effect as the difference between the two groups' before-after changes.