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in local estimation blocks, our theory treats the estimation block size k as fixed. While the resulting spot volatility …We present a new theory for the conduct of nonparametric inference about the latent spot volatility of a semimartingale … estimator is no longer consistent, the new theory permits the construction of asymptotically valid and easy …
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-change sampling from calendar to volatility time. The estimation results indicate that the effect of order flow on exchange rates is …
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