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Autorregresive conditional volatility, skewness and kurtosis
(University of the Basque Country, Department of Foundations of Economic Analysis II, 2002)
This paper proposes a GARCH-type model allowing for time-varying volatility, skewness and kurtosis. The model is estimated assuming a Gram-Charlier series expansion of the normal density function for the error term, which ...
An empirical comparison of the performance of alternative option pricing models
(University of the Basque Country, Department of Foundations of Economic Analysis II, 2002)
This paper presents a comparison of alternative option pricing models based neither on jump-diffusion nor stochastic volatility data generating processes. We assume either a smooth volatility function of some previously ...
A factor model of seasonality in stock returns
(University of the Basque Country, Department of Foundations of Economic Analysis II, 2002)
Most empirical evidence on stock market seasonality is based on the Dummy Variable Approach (DVA). Typically, the DVA leaves too much variability of stock returns unexplained and inference usually leads to weak or null ...