Compara mètodes

	Anàlisi de Sèries Temporals Interrompudes (ITS)	Diferència en Diferències (Diff-in-Diff)
Camp	Inferència causal	Econometria
Família	Regression model	Regression model
Any d'origen	2002	1994
Autor original	Wagner, Soumerai, Zhang & Ross-Degnan (segmented regression); Bernal, Cummins & Gasparrini (tutorial)	Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment)
Tipus	Quasi-experimental segmented regression	Causal inference / panel regression
Font seminal	Bernal, J. L., Cummins, S., & Gasparrini, A. (2017). Interrupted time series regression for the evaluation of public health interventions: a tutorial. International Journal of Epidemiology, 46(1), 348-355.	Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
Àlies	ITS analysis, segmented regression of time series, Kesintili Zaman Serisi (ITS) Analizi	diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff)
Relacionats	5	5
Resum	Interrupted Time Series analysis is a quasi-experimental design that estimates the effect of a single, well-dated intervention by comparing the trajectory of an outcome before and after it occurs. Formalised as segmented regression by Wagner and colleagues (2002) and popularised as a public-health evaluation tutorial by Bernal, Cummins and Gasparrini (2017), it separates the intervention's impact into a change in level and a change in slope.	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.