Σύγκριση μεθόδων

	Μελέτη Περιστατικού (Event Study) σε Πάνελ Πολιτικής	Difference-in-Differences (Diff-in-Diff)
Πεδίο	Αιτιακή Συμπερασματολογία	Οικονομετρία
Οικογένεια	Regression model	Regression model
Έτος προέλευσης	2021	1994
Δημιουργός	Callaway & Sant'Anna (2021); Borusyak, Jaravel & Spiess (2024); Sun & Abraham (2021)	Card & Krueger (canonical 1994 application); Angrist & Pischke (textbook treatment)
Τύπος	Causal inference / quasi-experimental panel design	Causal inference / panel regression
Θεμελιώδης πηγή	Callaway, B., & Sant'Anna, P. H. C. (2021). Difference-in-differences with multiple time periods. Journal of Econometrics, 225(2), 200-230.	Angrist, J. D., & Pischke, J.-S. (2009). Mostly Harmless Econometrics: An Empiricist's Companion. Princeton University Press. ISBN: 978-0691120355
Εναλλακτικές ονομασίες	panel event study, event-study DiD, staggered event study, difference-in-differences event study	diff-in-diff, DiD, Farkların Farkı (Diff-in-Diff)
Συναφείς	6	5
Σύνοψη	A panel event study is a quasi-experimental design that traces how an outcome evolves in periods before and after a policy event, using unit and time fixed effects to identify the causal effect. Widely used in economics and policy research, it tests for anticipation effects, verifies parallel pre-trends, and estimates dynamic treatment effects across post-treatment horizons — making it the standard toolkit for rigorous policy evaluation with observational panel data.	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.