পদ্ধতির তুলনা করুন

	Time-Varying Parameter TGARCH Model	থ্রেশহোল্ড GARCH (TGARCH) মডেল
ক্ষেত্র	অর্থমিতি	অর্থমিতি
পরিবার	Regression model	Regression model
উদ্ভবের বছর	1990s–2000s	1993-1994
প্রবর্তক	Extension combining Zakoïan (1994) TGARCH and time-varying parameter methods	Zakoian (1994); Glosten, Jagannathan & Runkle (1993)
ধরন	Volatility model with asymmetry and parameter evolution	Asymmetric volatility model
মৌলিক উৎস	Zakoïan, J.-M. (1994). Threshold heteroskedastic models. Journal of Economic Dynamics and Control, 18(5), 931–955.	Zakoian, J.-M. (1994). Threshold heteroskedastic models. Journal of Economic Dynamics and Control, 18(5), 931-955.
অপর নাম	TVP-TGARCH, time-varying TGARCH, threshold GARCH with time-varying parameters, TVP Threshold GARCH	Threshold GARCH, TGARCH, GJR-GARCH, asymmetric GARCH
সম্পর্কিত	4	6
সারসংক্ষেপ	The TVP-TGARCH model extends Threshold GARCH by allowing its volatility parameters to evolve over time via a state-space representation. It captures both the leverage effect — that negative return shocks increase volatility more than positive ones — and structural change in that asymmetry, making it well-suited for long financial time series subject to regime shifts.	The Threshold GARCH (TGARCH) model extends the standard GARCH framework by allowing positive and negative return shocks to have asymmetric effects on conditional variance. Negative shocks — bad news — typically amplify volatility more than positive shocks of the same magnitude, a stylised fact known as the leverage effect. TGARCH captures this asymmetry through a threshold indicator that switches on when the previous period's shock was negative.