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experiment in terms of the square root of the volatility function .... As an application, simple rateoptimal estimators of the … volatility and efficient estimators of the integrated volatility are constructed. -- High-frequency data ; integrated volatility …; spot volatility estimation ; Le Cam deficiency ; equivalence of experiments ; Gaussian shift …
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volatility of the Standard and Poors 500 index among recent extensions of the heterogeneous autoregressive model. While we find …, improvements achieved by the inclusion of implied volatility turn out to be insignificant. …
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-memory stochastic volatility models, under the nullhypothesis of short memory in volatility. We show that in this situation, if …
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