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	Model GARCH sa vremenski promenljivim parametrima (TVP-GARCH)	Model stohastičke volatilnosti (Heston)
Oblast	Ekonometrija	Finansije
Porodica	Regression model	Regression model
Godina nastanka	1982–2013	1993
Tvorac	Engle (1982) for ARCH/GARCH foundation; extended by Creal, Koopman & Lucas (2013) and others for time-varying parameter variants	Steven L. Heston
Tip	Volatility model with time-varying coefficients	Continuous-time stochastic volatility model
Temeljni izvor	Engle, R. F. (1982). Autoregressive conditional heteroscedasticity with estimates of the variance of United Kingdom inflation. Econometrica, 50(4), 987-1007.	Heston, S. L. (1993). A Closed-Form Solution for Options with Stochastic Volatility with Applications to Bond and Currency Options. Review of Financial Studies, 6(2), 327-343.
Drugi nazivi	TVP-GARCH, time-varying GARCH, TV-GARCH, state-space GARCH	Heston model, SV model, continuous-time stochastic volatility, Stokastik Volatilite Modeli (Heston, SV)
Srodne	5	5
Sažetak	The Time-Varying Parameter GARCH model extends the standard GARCH framework by allowing the conditional variance parameters — including the ARCH and GARCH coefficients — to change over time rather than remaining fixed throughout the sample. This makes it well-suited to financial and macroeconomic series where volatility dynamics evolve across different market regimes or economic episodes.	The stochastic volatility model is a continuous-time option-pricing and risk framework in which volatility follows its own random process rather than staying constant. The Heston model, introduced by Steven Heston in 1993, gives the variance a mean-reverting square-root (CIR) dynamic and yields a closed-form option price; it is the continuous-time counterpart of GARCH.