volatility of a time series. We derive the main properties of the model and apply it to all agricultural commodities in the … volatility process and, according to homoscedasticity tests, outperforms the ARCH(1) and GARCH(1,1) models, some of the most … popular approaches used in the literature to analyze price volatility. Keywords: Agricultural prices, volatility, GARCH models. …

prices. We empirically assess efficiency gains in volatility estimation when using range-based estimators as opposed to … simple daily ranges and explore the use of these more efficient volatility measures as predictors of daily ranges. The array … forecasts are produced by a realized range based HAR model with a GARCH volatility-of-volatility component. …

examines the consistency, persistency, and severity (degree) of volatility in exchange rate of Nigerian currency (naira) vis … were used to examine the degree or severity of volatility based on the first difference, standard deviation and coefficient … of deviation estimated volatility series for the nominal and real exchange rate of naira vis-a-vis the U.S dollar. The …