قارن الطرق

	نموذج ARIMA ذي المعلمات المتغيرة عبر الزمن (TVP-ARIMA)	نموذج فضاء الحالة (مرشح كالمان)
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1976–1989	1990
صاحب الطريقة	Cooley & Prescott (1976); Harvey (1989) state-space formulation	Harvey; Durbin & Koopman (state space treatment); Kalman filter
النوع	Time series model with evolving coefficients	State space time series model
المصدر التأسيسي	Harvey, A. C. (1989). Forecasting, Structural Time Series Models and the Kalman Filter. Cambridge University Press. ISBN: 9780521405737	Harvey, A. C. (1990). Forecasting, Structural Time Series Models and the Kalman Filter. Cambridge University Press.
الأسماء البديلة	TVP-ARIMA, time-varying ARIMA, adaptive ARIMA, state-space ARIMA	state space, Kalman filter, unobserved components model, Durum Uzayı Modeli (State Space / Kalman Filter)
ذات صلة	3	4
الملخص	The time-varying parameter ARIMA model extends the classical ARIMA framework by allowing its autoregressive and moving-average coefficients to evolve over time rather than remaining fixed. Cast in state-space form and estimated via the Kalman filter, it is designed for economic and financial time series whose dynamic structure shifts in response to structural breaks, policy changes, or regime transitions.	A state space model is a general time series framework that describes a series through unobserved (latent) state variables linked by a measurement equation and a transition equation, with the states estimated in real time by the Kalman filter. Developed in the state space tradition of Harvey (1990) and Durbin & Koopman (2012), it nests ARIMA and exponential smoothing as special cases.