Compara mètodes

	Anàlisi d'Impacte Causal amb Dades de Panell	Diferència en Diferències (Diff-in-Diff)
Camp	Inferència causal	Econometria
Família	Regression model	Regression model
Any d'origen	2015 (base method); panel extension mid-2010s	1994
Autor original	Brodersen et al. (2015); panel extension by Holtz et al. and subsequent literature	Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment)
Tipus	Bayesian structural time-series causal inference	Causal inference / panel regression
Font seminal	Brodersen, K. H., Gallusser, F., Koehler, J., Remy, N., & Scott, S. L. (2015). Inferring causal impact using Bayesian structural time-series models. Annals of Applied Statistics, 9(1), 247-274.	Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
Àlies	Panel CausalImpact, multi-unit causal impact, panel BSTS causal inference, panel structural time-series causal analysis	diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff)
Relacionats	6	5
Resum	Panel data causal impact analysis extends the Bayesian structural time-series approach of Brodersen et al. (2015) to multi-unit panel settings, estimating the counterfactual for several treated units simultaneously using control units as a donor pool. It produces credible intervals for the causal effect at each post-intervention time point, aggregated across units and periods.	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.