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Doubly fractional models for dynamic heteroskedastic cycles
(2011-02)
Strong persistence is a common phenomenon that has been documented not only in the levels but also in the volatility of many time series. The class of doubly fractional models is extended to include the possibility of long ...
Wavelet multiple correlation and cross-correlation: A multiscale analysis of euro zone stock markets
(2011-06)
Statistical studies that consider multiscale relationships among several variables use wavelet correlations and cross-correlations between pairs of variables. This procedure needs to calculate and compare a large number ...
Time-Varying Beta Estimators in the Mexican Emerging Market
(2011)
This paper compares the performance of three different time-varying betas that have never
previously been compared: the rolling OLS estimator, a nonparametric estimator and an
estimator based on GARCH models. The study ...