مقایسهٔ روش‌ها

	تفاوت در تفاوت‌های پویا	مدل اثرات ثابت داده‌های پانل
حوزه	استنتاج علّی	اقتصادسنجی
خانواده	Regression model	Regression model
سال پیدایش	2021	2014
پدیدآور	Callaway & Sant'Anna; Sun & Abraham	Hsiao (textbook treatment); within transformation of panel data
نوع	Causal inference / quasi-experimental	Panel data regression
منبع بنیادین	Callaway, B., & Sant'Anna, P. H. C. (2021). Difference-in-differences with multiple time periods. Journal of Econometrics, 225(2), 200-230.	Hsiao, C. (2014). Analysis of Panel Data (3rd ed.). Cambridge University Press.
نام‌های دیگر	Dynamic DiD, Staggered DiD, Event-time DiD, Heterogeneous-timing DiD	fixed effects model, within estimator, panel fixed-effects regression, Panel Veri — Sabit Etkiler Modeli
مرتبط	4	5
خلاصه	Dynamic Difference-in-Differences extends the classic DiD framework to settings where units adopt treatment at different times. Rather than collapsing all variation into a single 2x2 comparison, it estimates group-time average treatment effects for each adoption cohort at each calendar period, then aggregates them into interpretable summaries of the causal effect over event time.	The Panel Data Fixed Effects model estimates relationships from panel data (the same units observed over several time periods) while controlling for unit- and/or time-specific effects, supporting causal inference. It is developed as the within estimator in standard treatments such as Hsiao's Analysis of Panel Data (2014).